Q5 mild BBK thread

[Axis]

Well after reading on this mild BBK option, I bought myself a set (345mm version) and I'm currently getting everything together to make it work.

Drewgold bought the 320mm version and is also getting everything he needs to make it work and will possibly chime in.

The reference thread in the B6 section with lots of good info

The reason I call it a mild BBK option is because :

1 - Its a 4 pistons caliper vs the usuall 6 piston caliper BBK
2 - Its a 2 piece caliper vs a 1 piece caliper

What makes it an attractive option :

1 - Its a 4 piston caliper vs our single piston caliper
2 - Its one piece caliper/carrier design (Caliper is two assembled pieces)
3 - Its freaking aluminium and weights 9 pounds
4 - Pad change is a breeze
5 - Possibility to run them with your actuall rotors (320mm version)
6 - Possibility to run them with S4 2 piece floating rotors which offer better cooling for those who track and dont want to transfer heat to the hub/bearings (345mm version)
7 - No need for machined rotors and/or special bolts. These bolt right to our hub and you can use either B7 A4 or B7 S4 rotors of your choice.

Now, these can be found used from a salvage yard, so if you're unsure if the ones you're looking at are from a 2.0T or a 3.0T/3.0Tdi look for the "handle" in the built in carrier. No handle = 320mm and if it has one = 345mm. Be carefull I've been told these calipers are also offered on many other cars and the carrier holes wont match.

2013+ Audi Q5 320mm version from the 2.0T
Part number :
8R0 615 107 F
8R0 615 108 F







2013 + Audi Q5 345mm version from the 3.0T or 3.0Tdi
Part number :
8R0 615 107 G (Pre-revison = E)
8R0 615 108 G


***Handle on the built in carrier***

***Borrowed image from the B6 thread***

***Handle on the built in carrier***

ECS sells the single sensor in their kits so I assume this would be ideal. Single sensor is part number 8R0 615 121 and it looks like this :



These are the different brake wear sensors that could work :

EDIT 01/19/2017: Used part number 8R0 615 121 A (#12 in image below) on the 2.0T Q5 setup I did on my B6 and its a perfect match.

Nice option to tie up the brake pad wear sensor clip to the brake hose :

Click here



1 - 002595ECS04A Which is a brake pad wear sensor bypass
2 - 7L5 907 637A Which is the sensor for the Audi Q7 or VW Touareg (Not a good option since you'll need to cut your oem pad connector and solder them on the sensors)
3 - 8R0 615 121 [22-07-13 >> 27-04-15] 8R0 615 121 A [27-04-15 >>] Which is the part number for the 2013 + Q5

I ordered the dual sensor version from the Q7/VW Touareg and will see if it works, if it doesnt I'll modify it to single sensor and I'll edit accordingly. <---Had to cut the connectors and soldered the ones from my oem pads on them. Go with 8R0 615 121 A (#12 in image below).



345mm Q5 Caliper weight:

For the Americans, that's 8.99 pounds

So far from what I noticed you cant run S4 dust shield with the 345mm version. Will probably cut part of it that comes in contact with the built in carrier.

You can use MKIII 2.0L SS brakes lines : A model available on ECS

I'll edit later with more details

Built kits from ECS :

Front Big Brake Kit - Stage 3 - 2-Piece Cross Drilled & Slotted Rotors (345x30)

Front Big Brake Kit - Stage 3 - Cross Drilled & Slotted Rotors (345x30)

Click HERE to order or for more information


Click HERE to order or for more information

[vce1232000]

info. I might have went this option instead of what I . It would have been cheaper and could have retained smaller rim size

[drewgold]

Thanks for getting this thread going Axis!

Here's a good thread from the B8 A4 forum as well on the Q5 upgrade.

I have yet to fit my 320mm version but everything is supposed to be plug and play. As mentioned dust shields may need to be trimmed. New brake lines will also be required, Looks like early MK3 Jetta brake lines will work but I need to confirm this as well.

I have done lots of research on pad options. The 345mm and 320mm versions of the caliper take the same pads. There are not a lot of pads listed specifically for these Q5 Brembos however there a lot of calipers out there that use very similar if not the same pads.

I have been following this thread with a lot of interest, so I spoke at some length with Pagid US. Pagid offers stock/street pads with the wear sensors for this caliper. That pad shape is T2212 or T2321, see this link: Q5 Brembo 4 piston caliper Stock or Street Brake Pads

The gent I spoke to confirmed that they do offer the E2487 as a race pad option. This pad does not have wear sensors, but that isn't really an issue for the track. SO, you can get great race pads from Pagid for these calipers...but wait, there's more...

On Pagid's page for this pad shape, they mention all the other cars that take this pad shape as well, which is a pretty healthy list of performance cars.

Check it out:
Pagid 2487

REF NO. THICKNESS MAKE MODEL YEAR FRONT REAR
2487 15.4 mm Aston Martin DB 9 04 → X
2487 15.4 mm Aston Martin Vantage V8 GT4 ProDrive [race car] 12 → X
2487 15.4 mm Audi TT RS 2.5 Quattro 09 → X
2487 15.4 mm Cadillac CTS-V (4 piston front caliper) 03 → 09 X
2487 15.4 mm Chevrolet Corvette Brembo non ceramic 09 → X
2487 15.4 mm Chevrolet Camaro SS 09 → X
2487 15.4 mm Ford GT 04 → 06 X X
2487 15.4 mm Ford Mustang Shelby GT500 07 → X
2487 15.4 mm Ford Mustang Boss 302 12 → X
2487 15.4 mm Honda (Acura) Acura TL 04 → X
2487 15.4 mm Hyundai Genesis Coupe 3.8 track 10 → X
2487 15.4 mm Mitsubishi Lancer Evo V - Evo IX 98 → 06 X
2487 15.4 mm Mitsubishi Lancer Evo X 07 → X
2487 15.4 mm Subaru STI 03 → X
2487 15.4 mm Volvo S60 Turbo R Brembo brakes 03 → X
2487 15.4 mm Volvo V70 R 2.5T Brembo brakes 03 → X
2487 15.4 mm Audi A3 RS3 Quattro 11 → X
2487 15.4 mm Dodge Viper SRT TA (time attack) 14 → X X

The question I have is...if you replace the rotors with some nice 2 piece floaters with directional vanes, and maybe take off your dust shields, and install the Macan air scoops, would they hold up for track days?

If the answer is yes, then we have a very affordable BBK, with pretty much unlimited pad selection.

Found this in the S4 thread; thought I would share.

I picked up a set of Brembo Q5 calipers for my B7 A4. I was not thrilled about the limited pad options so did some research similar to what was found through the Pagid site.

I checked out the Brembo site and their pad specs. The Brembo site doesn't list pads for the Q5 Brembo calipers (Which is ironic because the calipers are brembo and the OEM pads are actually marked with the Brembo logo)??
Knowing that the pads for the TTRS/RS3 were virtually the same as the Q5 Brembos, (ECS also has some pads listed for both the Q5 Brembos and the TTRS calipers) I looked up the Brembo listing for the RS3 pads and then scanned through their list of pads looking for other vehicles that use the same part #. Waaaayyyy at the bottom of the list was the 2010 Gen 2 VW Touareg. Seems that 330mm Brembo 4 piston calipers were an option on these and that the pads are the same part # as the RS3. This opens up a whole host of options.

The Brembo pad part # is 07.B314.83 these pads accept wear sensors and are the same part number as Brembo lists for the RS3/TTRS.

I can also confirm that many of these part numbers cross reference with the cars listed above. The Aston Martin DB9 uses these pads on the rear as well as some models of Corvette.

If you cross-reference the Toureg fitment for pads there are a number of options, including:

Pagid: 1977740
EBC Red: DP31908c
Hawk HPS: HB632F.586,
And a whole host of track pads from Hawk: HB632N.586, HB632Z.586, HB632B.586

There are loads of others as well and these pads all appear to have the notch for the wear sensors.

The Caveat is that the pad dimensions APPEAR to be the same or very close but there is some variation, often by only a few tenths of a millimeter. The main difference being in the pad thickness which could mean that some pads are too thick.

Centric lists their specific pads for the Q5 Brembos as measuring 131.8mm wide x 77.5mm high x 15.8mm thick
The Brembo RS3/TTRS/Touareg pads are listed as: 131.6mm wide x 77.3mm high x 17.1mm thick
Hawk lists their Touareg pads as: 131mm wide x 77mm high x 15mm thick (These numbers seem rounded)

I still need to get a set of calipers and measure the OEM pads that came with my Q5 calipers but I may bite the bullet and just buy a set of Hawk pads for the Touareg and see if they are indeed compatible.

In looking through pages of pad shapes and sizes for Brembo calipers, I also just discovered that the 2010 (And probably other years) Subaru WRX STi also has the same pad size and shape as the Q5 Brembo pads however these pads don't include a notch for the wear sensor. It does look like they'll fit though and offers another huge selection of pads possibilities.

I'll do some more research but looking promising for these calipers!!

Here are pad diagrams from a few manufacturers for comparison:

Centric direct replacement pads for Q5 Brembo Calipers:



Brembo RS3/TTRS/Touareg pads:



Hawk Touareg (And apparently Corvette) pads:



And the Brembo Subaru WRX STI pads:

[drewgold]

I was recently able to track down a set of WRX STI pads from a NASIOC forum member who was kind enough to send me an old set.
In comparing the pads side by side they are virtually identical, only major difference is that the Subaru pads don't accommodate a wear sensor.

As far as size goes, the backs are identical width and height-wise. The Subaru pads have a slightly larger hub radius cutout but barely. I test fitted them in my calipers and they seem to fit perfectly. Being as these pads are super worn, I can't road test them but I don't see any reason why they won't work. This opens up a huge list of pad options for thee calipers!!

Pads were from a 2010 Subaru Impreza WRX STI.
OEM pads on top in pics and STI pads on the bottom:






Sent from my iPhone using Tapatalk

[drewgold]

For what it's worth, the 320mm calipers weigh in at 3,917 grams. As Axis mentioned, these calipers seem impossibly light, definitely a bonus of switching to this setup!

Does anyone know the weight of the OEM A4 front calipers? I'll weigh mine when they come off but just curious.

As a comparison, the rear S4 calipers that I have weigh 4347g each, much smaller calipers for a smaller rotor and fairly significantly heavier than the Q5 Brembos!

[CLEANA3]

Any more info. Have the S4 rotors on my car now and looking at the q5 options. Good info guys

[pat_do]

Hi Axis,

Did you had any breakthroughs with the 345 mm calipers being compatible with the stock 17's double spoke wheel?

I have a spare tire that you can borrow if you need to test fit. Just gotta drive to my place.

Pat_do

[Auditude1Six]

Bolted on a set of the 320mm calipers.

Anyone know if there is any brake module coding that can be changed for the front caliper change to help with the proportioning?

[Axis]

Hi Axis,

Did you had any breakthroughs with the 345 mm calipers being compatible with the stock 17's double spoke wheel?

I have a spare tire that you can borrow if you need to test fit. Just gotta drive to my place.

Pat_do

Some B6 guys have fitted the A4 B6 17" Avus wheels without coming in contact with the calipers, not 100% if it was with the 320 or 345 version.

I test fitted my A4 B6 sport wheels and the caliper was coming in contact with the balancing weights and was 2-3mm away from the spokes.

Even if I would balance my wheel static, I'm not confortable with that clearance so I'm going with 18" Sline wheels on studded Hakka 7 for next winter, I prefer to have more room and better brake cooling

[pat_do]

Some B6 guys have fitted the A4 B6 17" Avus wheels without coming in contact with the calipers, not 100% if it was with the 320 or 345 version.

I test fitted my A4 B6 sport wheels and the caliper was coming in contact with the balancing weights and was 2-3mm away from the spokes.

Even if I would balance my wheel static, I'm not confortable with that clearance so I'm going with 18" Sline wheels on studded Hakka 7 for next winter, I prefer to have more room and better brake cooling

Bonne année bro!

[Axis]

Bonne année bro!

Pareillement :)

[Axis]

So I installed my 345mm kit so I'll leave a couple notes here :

- Brake pad sensors from the Q7/Touareg will work but you will have to cut the connector from your old pads and weld it in place of the ones on the Q7/Touareg pads.

- If you're using the oem B6/B7 S4 dust shields you will have to cut it at 12 o'clock and 7 o'clock in order to clear the caliper carrier "ears



I had a really hard time bleeding them initially and always had air in the system, turns out I didnt tighten the driver caliper hardline enought and it was leaking. Fixed that, bled them again and everything works perfectly now.

Quick picture because we like pictures:

[pat_do]

Loooks badassss

How are thet compared to stock?

[vvenom800tt]

Looks good axis. Should've gone yellow

[Axis]

Loooks badassss

How are thet compared to stock?

Well I used Centric Posi Quiet pads so the braking is very linear, the more you press, the more it brakes. But when you press hard, you bite the steering wheel. I imagine guys running 17/18z with aggresive pads must chew their steering wheels lol

It's also very balanced coupled with the S4 rears.

Looks good axis. Should've gone yellow

I'm conservateur :) But I like my red accents even if I was deceived that the BBS center caps look a bit orange compared to the fire truck red calipers :(

[vvenom800tt]

My yellow stuff are very linear as well. They can bite hard though if you dont thread with caution

[Axis]

I've beed looking at options for replacement pistons seals since the 8R0 698 471 A oem rebuild kit includes 4 pistons which arent necessary for a rebuild and is quite pricey at 100$/per side (Garage price).

So I spoke to Kevin, a CARid rep and we found the Centric kit #143.62059 which are listed everywhere for Cadilac/Buick/Corvette with Brembos but listed to fit the 2013+ 2.0T/3.0T/3.0Tdi Q5's on the Centric website.

Will report back once I receive them and test them out.

[.RJ]

Where are you guys picking up used Q5 calipers? I cant find them anywhere.

[Axis]

Where are you guys picking up used Q5 calipers? I cant find them anywhere.

Click here

[.RJ]

Thanks - would like to find a set with the 345mm rotors, if possible.

[Axis]

Installed a 320mm Q5 2.0T set on my B6, didnt need to cut the B7 A4 dust shield like I did when I installed the 345mm set paired with S4 dust shields.

Used the dual sensor Q5 brake pad wear sensor and the connector was a match to ours. Didnt need to do any cut/soldering like I did when using Touareg sensors.

[onedumslack]

Which rebuild kits are you guys using? Do happen to have part numbers? I see cheap ones on rock auto but I'm not sure if they're any good quality and I can't find any on ECS tuning.

[Axis]

New Porsche Macan are rocking these calipers powder coated from the factory with Porsche decals. Wonder if they have the same spacing/carrier mounting points.

Which rebuild kits are you guys using? Do happen to have part numbers? I see cheap ones on rock auto but I'm not sure if they're any good quality and I can't find any on ECS tuning.

I would have to double check but I'm pretty sure its : Centric 143.62059.

Isnt listed for Q5 Front calipers, its listed for Corvette/Buick/ect which all have 4 pistons Brembos.

[pat_do]

Installed a 320mm Q5 2.0T set on my B6, didnt need to cut the B7 A4 dust shield like I did when I installed the 345mm set paired with S4 dust shields.

Used the dual sensor Q5 brake pad wear sensor and the connector was a match to ours. Didnt need to do any cut/soldering like I did when using Touareg sensors.

Zimmerman slotted discs?

Looks great

[Axis]

Zimmerman slotted discs?

Looks great

Ecs Geomet, great combo with the Centric Posi Quiet. They squeal when cold for the first time you press on the brake but have amazing bite. (Might because I havent been able to bead them yet, winter...)

I have Stoptech Slotted High carbon on the B7 with the same pads, no squeaking when cold but the initiall bite is not as strong.

[canadianA4B7]

Great info axis.

And yes the 18Z upgrade requires a healthy appitite of Audi emblems, specifically from the steering wheel. Flavoured to your choice (spicey bar-b-q is my go to) it can make a delicious savoury snack while on the road.

[onedumslack]

I would have to double check but I'm pretty sure its : Centric 143.62059.

Isnt listed for Q5 Front calipers, its listed for Corvette/Buick/ect which all have 4 pistons Brembos.

Thanks again, I just noticed I must've missed you posting the same part# earlier as well. I'm cleaning up a set now and getting ready to attempt powder coating the 320mm version and a set of s4 rears.

[onedumslack]

Anyone know why the OEM kit for the seals is so outrageously expensive? Is it coming with the pistons? Part 9 on the diagram appears to be pistons and seals while part 10 looks like the boot.
https://www.genuineaudiparts.com/par...agramCallOut=5
Part# 8R0698471A

[Axis]

^4 pistons and piston seals included. As you mentionned, boots are not are on the other kit.

Carefull, there's an A and a B revision of the pistons and seals. Look at the same kind of screenshot of Etka I posted in the first post.

You can usually re-use the boot without any issues.

[onedumslack]

^4 pistons and piston seals included. As you mentionned, boots are not are on the other kit.

Carefull, there's an A and a B revision of the pistons and seals. Look at the same kind of screenshot of Etka I posted in the first post.

You can usually re-use the boot without any issues.

My boots are definitely not reusable after I was done figuring out how to get them out. And apparently me breaking one of the pistons was an expensive lesson.

[onedumslack]

It looks like the just the 345mm version has 2 revisions right? But the 320mm just has the 1? At least on genuineaudiparts they it only looks like one to me.

[onedumslack]

And so people can see what not to do to your piston no matter how close to coming out it already is, don't use a damn flathead and pry under the lip :-(

[Axis]

And so people can see what not to do to your piston no matter how close to coming out it already is, don't use a damn flathead and pry under the lip :-(

If you didnt scratch the surround of the piston you can re-use it. That part is made to secure the dust boot. You can probably still use it.

[onedumslack]

If you didnt scratch the surround of the piston you can re-use it. That part is made to secure the dust boot. You can probably still use it.

Yeah, nothing is scratched. I'm still thinking about getting the kit and just putting the others up for sale since they don't seem to be available anywhere else that I can find.

[onedumslack]

Do you know if it matters which bore the pistons go back in? I didn't notice until I had all the pistons out and on the table that there's two different kinds of pistons even though they appear to be the same size.

[Axis]

Do you know if it matters which bore the pistons go back in? I didn't notice until I had all the pistons out and on the table that there's two different kinds of pistons even though they appear to be the same size.

Deeper hole in the pistons = inside

[Axis]

Nice option to tie up the brake pad wear sensor clip to the brake hose :

Click here



I broke two brake pad wear sensor wires when I first did it on the B7, I'm still using tiewraps but I'm picking four of these up soonish.

[kt883]

Anyone rocked BBS LM 18x8.5 et36? Stock calipers look fairly tight fit so these will be very close with such a flat spoke design.


There are templates available only but I'm not sure which type this caliper is.

Found these for MKIII 2.0L SS lines -
http://www.autoanything.com/brakes/77A4620A3567654.aspx

[jschrauwen]

Will this Q5 Brembo 345mm BBK be a direct bolt-on for my 2008 A5?
If so, are there any slightly different supporting parts needed?

[vvenom800tt]

Maybe ask the A5 guys, not the A4 guys.