My New S4 steering issue?

[mgiglio]

Hello everyone,

New to the forum. Just purchased a new 2015 s4. Feel like the steering looses its center and almost drifts at times. Does it in every driving mode and is a lot worse above 60 mph. Am I imaging this or is it known issue with these cars? If it is, anything I can do to fix it? Tires are not under inflated (I Know someone will ask me this).

-Thanks

[moyenecorniche]

Its called bump steer. A normal annoyance with 245+ tires on 8"+ wheels in a 35-40 profile.
But you should have your dealership check toe, camber and all. This may be the real reason.
This time of year with the pavement so out of shape with frost heaves and what nots you will have the road steering your tires but do have the alignment checked first.

[Waaazooo]

All of the electric steering does this. I believe that it's because the the yaw metering is too precise and powering for the alignment. I wonder if a more neutral (zero toe) alignment would fare better or worse


Sent from my iPhone using Tapatalk

[mgiglio]

Thanks. Yes, ill have the dealer check it out. It can be really unnerving at times, I swear Ive felt the steering wheel move mid corner when taking a turn. I'm also wondering if its the tires. Car has Conti Sport Contact 3's. Never really been a fan, I had Michelin Pilot Super Sports on my previous car and the overall steering feel had much less "slop" I realize this car has a little more play due to the EPS but I'm wondering if maybe its the tires as well.

[SteveYem]

My 2015 does the same thing. I am taking my car for its 5000 mile oil change this month and will be asking them to investigate this. Definitely a problem with the steering assist boosting when it shouldn't be, as far as I can tell.

[Dragoncub]

I've had a similar issue on my 2015. The car will drift to one side and the steering will feel "loose". In trying to correct it almost feels like it corrects too much and then I have to recorrect. I spoke with my sales guys and he suggested dynamic mode. I had been using auto since I got the car (end of December) and recently changed it to individual where every setting is auto except for steering which is set to dynamic. It seems to have help, I've noticed it less. btw, I've got around 500 miles.


There a thread about this where the 2013's had even worse issues.

http://www.audizine.com/forum/showth...ng-Issues-2013

[saxon]

get a eurocode ak

[jygesq]

My steering is set to dynamic and I do not notice a problem.2015 s4 1300 miles.

[bpang1]

I have a 2015 with about 900 miles and do not notice this at all.

However, my last car was a WRX that was lowered and with 245/40/17 so that was a recipe for MAJOR bump steer issues...which makes the S4 seem like I can't feel anything right now.

[BzzzBom]

I have a 2013 B8.5. The steering was horrible until the following were done:
1. Installed Eurocode Alu Kreuz
2. Replaced steering rack
3. De-selected DSR on Vag Com

The steering was a 3 (0-10 scale) and is now an 8.

[badfish]

I've had a similar issue on my 2015. The car will drift to one side and the steering will feel "loose". In trying to correct it almost feels like it corrects too much and then I have to recorrect. I spoke with my sales guys and he suggested dynamic mode. I had been using auto since I got the car (end of December) and recently changed it to individual where every setting is auto except for steering which is set to dynamic. It seems to have help, I've noticed it less. btw, I've got around 500 miles.


There a thread about this where the 2013's had even worse issues.

http://www.audizine.com/forum/showth...ng-Issues-2013

I know its a long thread, 50+ pages, but if you really want to know about what is going on with Audi and its failing attempt at electronic power steering read every page. Its the only thread that covers everything from the beginning over 3 years ago to today and the problems we still are having. I have a lot of posts in that thread because I've been personally dealing with this for over a year so if you have any questions feel free to PM me.

[rich-in-cincy]

I've noticed my '15 will pull or drift while on the highway. It's not horrible and I personally think it's the tires, not 100% sold on the stock Conti's.

[Maitre Absolut]

Its weird how so many people report the exact same issues but not all cars are affected....

I am super anal about things affecting the alignment and normally can easily convince myself that mine does the same...but it just doesnt

[chaos2984]

Its weird how so many people report the exact same issues but not all cars are affected....

I am super anal about things affecting the alignment and normally can easily convince myself that mine does the same...but it just doesnt

Im with you man. I don't feel anything like the people are talking about and ive felt this issue with some cars with electric ps cars and its horrible. I have a 14 and I love the steering. The only issue I had with it was the steering wheel was off center when it was new but the dealer corrected that. I love how the steering feels while slow and hwy speeds. I have the basic steering too

[vpr80]

My 2014 did this like crazy from day 1. I got spacers 15/20mm and the Alu Kreuz and it seemed to improve significantly. I'd recommend both of those, cheap and good to get anyway.

[sjuhawks19]

I see you are in NJ, could it just be because you have summer tires on and it's 11 degrees out?

[mgiglio]

Glad to hear I'm not the only one but sad to hear about these issues. This is a great car by all means, however on a 50-60k performance car, I can't believe audi would let a product go out like this. It is definitely not a bump steering or tram-lining issue, the more I drive it, the more I can feel that it has to do with the calibration of the EPS.

Leaving the car in dynamic mode definitely helps, leaving it in auto is THE WORST. In auto, I can feel the steering ratio and weight constantly change like it can't make up its mind. Driving on the highway in any steering mode is bad as well, If audi can't come up with an update for this, and assuming it is a programming issue with the EPS, I would imagine a great deal of money to be made by any company that could come up with an aftermarket solution.

From what I'm hearing, the Alu Kreuz will help but not eliminate the issue, changing out my tires (conti) will probably help a little as well but the underlying problem still seems to be the EPS not knowing what to do.

[mgiglio]

I see you are in NJ, could it just be because you have summer tires on and it's 11 degrees out?

And no, my E90 M3 had Pilot Super Sports driven year round and never once had this issue. It specifically said on the sidewall "not for use below 40 degrees" lol

[SteveYem]

get a eurocode ak

Did that, and it didn't improve the feeling. When I get near top-dead-center steering wheel position, it sort of feels like there are two 'North' magnets passing by each other. It kind of feels like right around that spot the boost from the steering assist becomes abnormally amplified. I think this is the "slip" that all the 2013/2014 guys were talking about in thedollardoctor's original thread on this. It's a shitty feeling.

The sensation was there when I had summer tires at stock ride height, summer tires at lowered ride height, and now winter tires at lowered ride height.
I will admit that my front camber is outside of OEM spec due to being lowered....but that was the same situation on my 2012 S4 and most other cars I've owned, and it never caused a steering issue. But those cars all had hydraulic assisted steering. Maybe there is some nuance in the electric assist system where it is too sensitive for its own good which causes unwanted fluctuation in the assist boost level at certain steering angles, and maybe even due to certain alignment specs. It would be helpful to know exactly what the steering system senses in order to control the amount of steering assist.....then we might be able to have a more intelligent conversation about it.

[GTItoS4]

Thanks. Yes, ill have the dealer check it out. It can be really unnerving at times, I swear Ive felt the steering wheel move mid corner when taking a turn. I'm also wondering if its the tires. Car has Conti Sport Contact 3's. Never really been a fan, I had Michelin Pilot Super Sports on my previous car and the overall steering feel had much less "slop" I realize this car has a little more play due to the EPS but I'm wondering if maybe its the tires as well.

I get the same mid-corner bump steer on the 19" wheels + contis. It is a little scary at first. But with my winter 18" wheels + PA4's the issue instantly went away.

[mgiglio]

Did that, and it didn't improve the feeling. When I get near top-dead-center steering wheel position, it sort of feels like there are two 'North' magnets passing by each other. It kind of feels like right around that spot the boost from the steering assist becomes abnormally amplified. I think this is the "slip" that all the 2013/2014 guys were talking about in thedollardoctor's original thread on this. It's a shitty feeling.

The sensation was there when I had summer tires at stock ride height, summer tires at lowered ride height, and now winter tires at lowered ride height.
I will admit that my front camber is outside of OEM spec due to being lowered....but that was the same situation on my 2012 S4 and most other cars I've owned, and it never caused a steering issue. But those cars all had hydraulic assisted steering. Maybe there is some nuance in the electric assist system where it is too sensitive for its own good which causes unwanted fluctuation in the assist boost level at certain steering angles, and maybe even due to certain alignment specs. It would be helpful to know exactly what the steering system senses in order to control the amount of steering assist.....then we might be able to have a more intelligent conversation about it.

^ I feel exactly the same. Tires may help but its more of a band aid. It has something to do with the EPS, I've had cars bump steer, this is a slightly different feeling. Its more of a sudden lack of feedback and then a sudden return of feedback from the steering. I feel like the steering is thinking "decrease assist to make steering heavy, no wait increase assist to make steering light, no wait thats to much assist, go back to decrease assist."

[SteveYem]

^ Yep. I am going to be very clear with the service manager that I am not interested in the 48k8 software update, because it seems everyone who has done the update reports that the result is no more discernible difference between comfort and dynamic steering modes (although I'm not sure which mode it ends up feeling like, but worst-case I'll assume Comfort), and then some people have reported that even the software update was just a short term band-aid and that the problem came back after XXX or XXXX miles. The tune I will be singing is that I waited to trade my B8 for a B8.5 until 2015 so that the EPS system could have the bugs worked out and prevent me from having to hassle the local Audi dealer for a replacement rack....but unfortunately Audi cannot seem to get this right so I have to demand replacement hardware.

[CrownSeven]

^ Yep. I am going to be very clear with the service manager that I am not interested in the 48k8 software update, because it seems everyone who has done the update reports that the result is no more discernible difference between comfort and dynamic steering modes (although I'm not sure which mode it ends up feeling like, but worst-case I'll assume Comfort), and then some people have reported that even the software update was just a short term band-aid and that the problem came back after XXX or XXXX miles. The tune I will be singing is that I waited to trade my B8 for a B8.5 until 2015 so that the EPS system could have the bugs worked out and prevent me from having to hassle the local Audi dealer for a replacement rack....but unfortunately Audi cannot seem to get this right so I have to demand replacement hardware.

Good luck with that. I highly doubt they'll OK a rack replacement with out trying all other options first, including the software update. And to be honest, I don't think a rack update will permanently fix the issue.

Oh and not sure why we're starting another thread on this, there is this mega-thread that should be used instead:

http://www.audizine.com/forum/showth...ng-Issues-2013

[mgiglio]

^thread seems to talk about notchiness related to faulty steering racks. I don't think this is a rack problem, this is a software or calibration issue. I'm not talking about "notchiness" unless people mean that term for vagueness and loosing feedback. The easiest way to describe it is that on the highway and on turns the steering goes from feeling tight to very light and back to tight again within a matter of split seconds. This causes the drifting on the highway and when cornering because you're compensating for the lack of feeling for an instant and using more input than you should, then the steering gets tight again and your car steers more than it should have.

[joediesel]

^thread seems to talk about notchiness related to faulty steering racks. I don't think this is a rack problem, this is a software or calibration issue. I'm not talking about "notchiness" unless people mean that term for vagueness and loosing feedback. The easiest way to describe it is that on the highway and on turns the steering goes from feeling tight to very light and back to tight again within a matter of split seconds. This causes the drifting on the highway and when cornering because you're compensating for the lack of feeling for an instant and using more input than you should, then the steering gets tight again and your car steers more than it should have.

My 2015 does the exact same thing, Although I dont notice it as much anymore (probably used to it). The resistance isnt constant, I notice it in dynamic mode as well, really loose near center of the steering, I havent noticed it on turns so much, but driving straight down the highway its a bit odd...

[SteveYem]

^thread seems to talk about notchiness related to faulty steering racks. I don't think this is a rack problem, this is a software or calibration issue. I'm not talking about "notchiness" unless people mean that term for vagueness and loosing feedback. The easiest way to describe it is that on the highway and on turns the steering goes from feeling tight to very light and back to tight again within a matter of split seconds. This causes the drifting on the highway and when cornering because you're compensating for the lack of feeling for an instant and using more input than you should, then the steering gets tight again and your car steers more than it should have.

You are hitting the nail right on the head. In the original mega-thread people were talking about the steering "slipping" causing the car to drift off track, implying that there was some disparity between the motion of the steering wheel and the movement of the steering rack, as though this were a true "steer by wire" system with no positive mechanical connection between the steering wheel and the steering rack. But in reality there is a pinion engaged with the rack similar to the previous generation hydraulic assist system, only the method of providing steering assist has changed.

I agree that the "slip" people are experiencing is due to the movement of the steering wheel that happens under the force of the driver's hands as the steering assist level (i.e. the torque resisting the steering wheel's rotation) fluctuates. Here is why I think this is true: there is a stretch of straight and relatively flat road that I drive every day on my way home from work. If I have both hands on the wheel at 10:30 and 2:30 and try to keep the car moving straight ahead, the feedback from the steering wheel is that it does not want to stay centered. I can certainly position it in the center but there is very little resistance to manual input to keep it centered. There seems to be excessive assist at/near top dead center, especially when approaching it from the left. Meanwhile on the same stretch of road if I center the steering wheel and take both hands off the wheel, the steering wheel stays centered and the car tracks straight.

I recently had the car aligned and the front and rear toe are right in the middle of OEM specs. Front camber is more negative than OEM spec but I can't see how camber would affect steering/tracking. When my hands are off the wheel the steering wheel and car stay straight on flat road surfaces. So I agree this is clearly a problem of incorrect steering assist level at/near steering wheel centered position which causes the user to inadvertently overcorrect the steering wheel position based on the amount of resistance felt. But what we don't know is whether it is a software problem, a hardware problem (not the rack but maybe the electric motor?) or a combination of both...

[mgiglio]

You are hitting the nail right on the head. In the original mega-thread people were talking about the steering "slipping" causing the car to drift off track, implying that there was some disparity between the motion of the steering wheel and the movement of the steering rack, as though this were a true "steer by wire" system with no positive mechanical connection between the steering wheel and the steering rack. But in reality there is a pinion engaged with the rack similar to the previous generation hydraulic assist system, only the method of providing steering assist has changed.

I agree that the "slip" people are experiencing is due to the movement of the steering wheel that happens under the force of the driver's hands as the steering assist level (i.e. the torque resisting the steering wheel's rotation) fluctuates. Here is why I think this is true: there is a stretch of straight and relatively flat road that I drive every day on my way home from work. If I have both hands on the wheel at 10:30 and 2:30 and try to keep the car moving straight ahead, the feedback from the steering wheel is that it does not want to stay centered. I can certainly position it in the center but there is very little resistance to manual input to keep it centered. There seems to be excessive assist at/near top dead center, especially when approaching it from the left. Meanwhile on the same stretch of road if I center the steering wheel and take both hands off the wheel, the steering wheel stays centered and the car tracks straight.

I recently had the car aligned and the front and rear toe are right in the middle of OEM specs. Front camber is more negative than OEM spec but I can't see how camber would affect steering/tracking. When my hands are off the wheel the steering wheel and car stay straight on flat road surfaces. So I agree this is clearly a problem of incorrect steering assist level at/near steering wheel centered position which causes the user to inadvertently overcorrect the steering wheel position based on the amount of resistance felt. But what we don't know is whether it is a software problem, a hardware problem (not the rack but maybe the electric motor?) or a combination of both...

At least two of us are on the same page. THERE IS DEFINITELY SOMETHING WRONG WITH THE HARDWARE (NOT THE RACK) OR SOFTWARE IN ELECTRIC POWER STEERING.

My car only has 1500 miles on it, wondering if I should bring it in or wait for the first service. Maybe by then more people will come out and complain and the service guys will have a way to address the issue.

I feel that if i go in there and voice my complaints, they are going to think im crazy. There needs to be more of us who complain about this.

[Daily Driver]

You are hitting the nail right on the head. In the original mega-thread people were talking about the steering "slipping" causing the car to drift off track, implying that there was some disparity between the motion of the steering wheel and the movement of the steering rack, as though this were a true "steer by wire" system with no positive mechanical connection between the steering wheel and the steering rack. But in reality there is a pinion engaged with the rack similar to the previous generation hydraulic assist system, only the method of providing steering assist has changed.

I agree that the "slip" people are experiencing is due to the movement of the steering wheel that happens under the force of the driver's hands as the steering assist level (i.e. the torque resisting the steering wheel's rotation) fluctuates. Here is why I think this is true: there is a stretch of straight and relatively flat road that I drive every day on my way home from work. If I have both hands on the wheel at 10:30 and 2:30 and try to keep the car moving straight ahead, the feedback from the steering wheel is that it does not want to stay centered. I can certainly position it in the center but there is very little resistance to manual input to keep it centered. There seems to be excessive assist at/near top dead center, especially when approaching it from the left. Meanwhile on the same stretch of road if I center the steering wheel and take both hands off the wheel, the steering wheel stays centered and the car tracks straight.

I recently had the car aligned and the front and rear toe are right in the middle of OEM specs. Front camber is more negative than OEM spec but I can't see how camber would affect steering/tracking. When my hands are off the wheel the steering wheel and car stay straight on flat road surfaces. So I agree this is clearly a problem of incorrect steering assist level at/near steering wheel centered position which causes the user to inadvertently overcorrect the steering wheel position based on the amount of resistance felt. But what we don't know is whether it is a software problem, a hardware problem (not the rack but maybe the electric motor?) or a combination of both...

Yeah, you may be on to something. I've felt this before on the highway in my 2014 Prestige in dynamic and with adaptive steering.

[SteveYem]

At least two of us are on the same page. THERE IS DEFINITELY SOMETHING WRONG WITH THE HARDWARE (NOT THE RACK) OR SOFTWARE IN ELECTRIC POWER STEERING.

My car only has 1500 miles on it, wondering if I should bring it in or wait for the first service. Maybe by then more people will come out and complain and the service guys will have a way to address the issue.

I feel that if i go in there and voice my complaints, they are going to think im crazy. There needs to be more of us who complain about this.

I wanted to take mine in a couple thousand miles ago, and I would have if the dealership was on my way to work. But it's far enough out of the way to deter me from doing so until I go in for the 5k service. But ideally, I would have taken it in as soon as I noticed the issue and was confident in its repeatability. BTW, I will be requesting to ride along with the service manager to watch him experience it for himself.

[mgiglio]

I wanted to take mine in a couple thousand miles ago, and I would have if the dealership was on my way to work. But it's far enough out of the way to deter me from doing so until I go in for the 5k service. But ideally, I would have taken it in as soon as I noticed the issue and was confident in its repeatability. BTW, I will be requesting to ride along with the service manager to watch him experience it for himself.

Sounds like a good idea, I'll be doing the same.

[badfish]

I love how reading this thread sounds just like history repeating itself to me. The notchiness people were first experiencing, though I never did but it was most pronounced in the cold and I live in SoCal, seems to be fixed but the slip that was being talked about is the exact same thing we are still experiencing but it used to be much worse. They have it minimized as much as they can I think but it is still there. Good luck with the dealerships they will tell you either they have never heard of this before or we will call corporate to see what they want to do which will be not much. Unfortunately even after two more model years Audi still hasn't gotten it perfect yet.

[stoked_S4]

OP: Go find a local B8 owner with a VAG cable and disable DSR as suggested in second link below. If you are lucky it will fix the problem for most of the time. This issue is temperature dependent and happens when it is below 50F and gets worse as it gets colder and above 40mph. I had this done in late Sept and so far I noticed wandering few times. Most of the time car tracks straight on the highway now. I hated driving past winter and pulled over at rest areas and restarted the car which seems to reset sometimes.

I am not surprised that 2015's have same issue. As others have said there are 2 main threads on this topic that cover notch and also 12 o'clock wandering issue. Whenever I want to see if anyone updated them is search for the word "48k8" in S4 forum:

http://www.audizine.com/forum/search...archid=5303051

http://www.audizine.com/forum/showth...highlight=48k8

[mgiglio]

OP: Go find a local B8 owner with a VAG cable and disable DSR as suggested in second link below. If you are lucky it will fix the problem for most of the time. This issue is temperature dependent and happens when it is below 50F and gets worse as it gets colder and above 40mph. I had this done in late Sept and so far I noticed wandering few times. Most of the time car tracks straight on the highway now. I hated driving past winter and pulled over at rest areas and restarted the car which seems to reset sometimes.

I am not surprised that 2015's have same issue. As others have said there are 2 main threads on this topic that cover notch and also 12 o'clock wandering issue. Whenever I want to see if anyone updated them is search for the word "48k8" in S4 forum:

http://www.audizine.com/forum/search...archid=5303051

http://www.audizine.com/forum/showth...highlight=48k8

stoked_s4,

Thanks for the advice, it definately sounds like disabiling the DSR will correct what I'm experiencing. I will try this and see what happens before bringing it in.

[SteveYem]

Quick update: I went to the dealer this morning for my 5k mile oil change, and I brought the steering issue (unusual sensation at/near top dead center) to the service advisor's attention. He said the tech was unable to replicate the issue, but offered to have the Service Manager road test the car to which I was very receptive. The Service Manager drove my car and I rode along, and within the first quarter of a mile he acknowledged the issue. He felt the variation in steering assist at/near the 12 o'clock position. He told me the following:

1) He was aware that 2013-2014 cars had issues with "notchy" steering sensation and poor on-center feel
2) He had not yet seen a similar case on a 2015, but he also has not seen nearly as many 2015's for service at this point compared to 2013-2014
3) He knows that on some 2013-2014 cars the 48k8 update seems to have solved the problem, while on others the 48k8 update was applied multiple times to no avail and in those cases Audi supplied a replacement steering rack. He said that from inspecting the replacement rack(s) he was unable to easily tell what the difference was from the originally supplied one - maybe a different electric motor, but could not confirm.
4) He said Audi will likely not be receptive to helping me because the car is lowered on aftermarket coilovers, even though he isn't convinced that this particular steering issue has anything to do with suspension geometry. (This was to be expected).

He then suggested that we take a stock 2015 S4 from their lot for a test drive on the same route that we took mine to see if the steering behaved the same way. NOTE: My car has 18" wheels with 245/40/18 winter performance tires, the stock S4 has 19" wheels with 255/35/19 summer tires. He drove the car first and said he felt a similar sensation. He cycled through comfort/auto/dynamic and set it felt better in dynamic but was still there. He said it felt more like a "dead" spot on center, as opposed to the more pronounced light-to-heavy transition that mine exhibits. We pulled over, switched drivers and I drove it back. What I felt was exactly what he described.

I mentioned to him that I have a set of adjustable front upper control arms that I am planning to install and then have the front wheel camber brought within OEM specs (currently too negative due to being lowered), and he suggested I do so and bring the car back for re-evaluation. I think he was receptive to this approach because of his findings on the bone stock 2015 S4 that we test drove.

Hopefully I will get the adjustable UCA's installed and have the wheels aligned within the coming month so I will update this thread as I go.

[Thumper3]

OP: Go find a local B8 owner with a VAG cable and disable DSR as suggested in second link below. If you are lucky it will fix the problem for most of the time.

This is on my list when I finally get around to plugging in and making all the tweaks I want (Seatbelt and door chime OFF! LOL).

It's funny, people talk about notchy-ness, and dead spots, I guess that's semi-accurate. I have the feeling of the wheel jerking out of my hands (not really, but close). I KNOW it's the DSR because of this. All of a sudden on a straight stretch where the road is pitched usually, it will suddenly just twist the wheel left or right slightly and the car wants to dart off center.

I leave mine in INDIVIDUAL which has the suspension/steering in dynamic since I normally drive around in Manual mode anyway and still get it on occasion. It is RARE, but does happen.

[CrownSeven]

Quick update: I went to the dealer this morning for my 5k mile oil change, and I brought the steering issue (unusual sensation at/near top dead center) to the service advisor's attention. He said the tech was unable to replicate the issue, but offered to have the Service Manager road test the car to which I was very receptive. The Service Manager drove my car and I rode along, and within the first quarter of a mile he acknowledged the issue. He felt the variation in steering assist at/near the 12 o'clock position. He told me the following:

1) He was aware that 2013-2014 cars had issues with "notchy" steering sensation and poor on-center feel
2) He had not yet seen a similar case on a 2015, but he also has not seen nearly as many 2015's for service at this point compared to 2013-2014
3) He knows that on some 2013-2014 cars the 48k8 update seems to have solved the problem, while on others the 48k8 update was applied multiple times to no avail and in those cases Audi supplied a replacement steering rack. He said that from inspecting the replacement rack(s) he was unable to easily tell what the difference was from the originally supplied one - maybe a different electric motor, but could not confirm.
4) He said Audi will likely not be receptive to helping me because the car is lowered on aftermarket coilovers, even though he isn't convinced that this particular steering issue has anything to do with suspension geometry. (This was to be expected).

He then suggested that we take a stock 2015 S4 from their lot for a test drive on the same route that we took mine to see if the steering behaved the same way. NOTE: My car has 18" wheels with 245/40/18 winter performance tires, the stock S4 has 19" wheels with 255/35/19 summer tires. He drove the car first and said he felt a similar sensation. He cycled through comfort/auto/dynamic and set it felt better in dynamic but was still there. He said it felt more like a "dead" spot on center, as opposed to the more pronounced light-to-heavy transition that mine exhibits. We pulled over, switched drivers and I drove it back. What I felt was exactly what he described.

I mentioned to him that I have a set of adjustable front upper control arms that I am planning to install and then have the front wheel camber brought within OEM specs (currently too negative due to being lowered), and he suggested I do so and bring the car back for re-evaluation. I think he was receptive to this approach because of his findings on the bone stock 2015 S4 that we test drove.

Hopefully I will get the adjustable UCA's installed and have the wheels aligned within the coming month so I will update this thread as I go.

Thanks for the update.

So at this point are they willing to do anything to try and address the issue? Or are they waiting for you to install the UCA's first?

[SteveYem]

Thanks for the update.

So at this point are they willing to do anything to try and address the issue? Or are they waiting for you to install the UCA's first?

He wants me to install the UCAs and get the front wheels realigned, then bring it back in for him to evaluate. He also wants me to leave my winter wheels and tires on to avoid introducing another variable.