Comprehensive list of OEM b5 a4 brake upgrades

[Pdaniel8]

Same pads, same caliper. The advantage (IIRC) is the bigger rotor allows heat to be dispersed easier/faster so less fade over time/hard use.

..

[Blazius]

Same pads, same caliper. The advantage (IIRC) is the bigger rotor allows heat to be dispersed easier/faster so less fade over time/hard use.

well along with more contact surface on the 312mm rotor, and the pads are obviously 312mm too

8N0 698 151 312

4B0 698 151 AB 288

[Pdaniel8]

well along with more contact surface on the 312mm rotor, and the pads are obviously 312mm too

8N0 698 151 312

4B0 698 151 AB 288

Thanks.

About the 269mm rear upgrade ventilated ...

Its really something I'm interested. "C5 A6 calipers work, too (so you can get calipers and carriers from the same car, which helps a lot)". I like this.

Carriers: 4D0615425B
Calipers Rt: 4B0615424
Calipers Lt: 4B0615423

About brake lines, no problem with that.

Question is: Still A8 Rotors? Or A6 C5: 4Z7 615 601

The only diference is:
A8 rotor 4D0 615 601B height: 46,4mm
A6 rotor 4Z7 615 601 height: 48,0mm

D2 A8 269mm:
B5 S4 Caliper Rt 8D0 615 424 C
B5 S4 Caliper Lt 8D0 615 423 C
D2 A8 rotors 4D0 615 601B
D2 A8 Carriers 4D0 615 425 B
D2 A8 rotors 269mm *(2mm washer in between the bracket and the upright)
Requires new brake lines?N
•Notes• "Should be stated that C5 A6 calipers work, too (so you can get calipers and carriers from the same car, which helps a lot), the only downside being that it requires a different brake line due to the C5 using a banjo bolt at the caliper."-walky_talky20

[Pdaniel8]

well along with more contact surface on the 312mm rotor, and the pads are obviously 312mm too

8N0 698 151 312

4B0 698 151 AB 288

Both are the same size.

https://www.onlinecarparts.co.uk/oen...8n0698151.html

https://www.onlinecarparts.co.uk/oen...0698151ab.html

[Blazius]

Both are the same size.

https://www.onlinecarparts.co.uk/oen...8n0698151.html

https://www.onlinecarparts.co.uk/oen...0698151ab.html

intresting via OEM part number states they aint.

[Cybersombosis]

Hi everyone. I have an opportunity to get the front brakes from a B6 S4 being parted out. What would I need off the S4 in order to make it work with my 2001.5 A4 B5 1.8T? Would I need to buy anything else or can I take everything I need off of the S4? Can I use the upright from a B6 S4? A lot of the posts say to use the B5 S4 uprights but I haven't seen a post saying you could use the B6 S4 uprights. There is a lot of info in this thread and I don't want to miss anything. A detailed list of what I need would be much appreciated. Thanks everyone.

Doug

[Bordom]

Hi everyone. I have an opportunity to get the front brakes from a B6 S4 being parted out. What would I need off the S4 in order to make it work with my 2001.5 A4 B5 1.8T? Would I need to buy anything else or can I take everything I need off of the S4? Can I use the upright from a B6 S4? A lot of the posts say to use the B5 S4 uprights but I haven't seen a post saying you could use the B6 S4 uprights. There is a lot of info in this thread and I don't want to miss anything. A detailed list of what I need would be much appreciated. Thanks everyone.

Doug

Get uprights. Then order 00 straight control arm. Do not get the 01-01.5 arms as the balljoint is fatter.

EDIT: 00 S4 control arms. Not A4

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[Cybersombosis]

Can I use the control arm of the donor car?

Doug

[LegendaryT2]

If it's straight I think u xan

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[Bordom]

Can I use the control arm of the donor car?

Doug

No. The strut bushing is too thin.

You can if you use washers, but that's just ghetto

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[Cybersombosis]

Can I press in the bushing from the control arm I am taking out? I am getting the setup for free in exchange for parting out the car at my place. The owner lives in an apartment and doesn’t have space. So if I can do it for free, I will.

Doug

[Bordom]

You could.

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[A1 A2 German]

If any fwd's with a C4 hub swap are willing to work with Vogmash. Idk, maybe he could send half a kit via a refundable deposit with return slip for someone to dry test fit a side. You wouldn't even have to crack open your hydraulic system, just talking a dry mount (I suggest having a hand full of ~1/2" washers to use as shims).

Also looks like C4 purchasing source's have dried up unless looking to drop big coin on a pair.

[Mattr567]

If any fwd's with a C4 hub swap are willing to work with Vogmash. Idk, maybe he could send half a kit via a refundable deposit with return slip for someone to dry test fit a side. You wouldn't even have to crack open your hydraulic system, just talking a dry mount (I suggest having a hand full of ~1/2" washers to use as shims).

Also looks like C4 purchasing source's have dried up unless looking to drop big coin on a pair.

I actually talked to him about this a while ago but couldn't justify the price. He offered a deep discount on a kit to let me be a guinea pig. I was just gonna do a 280mm D2 S8 rear with a GLI caliper since it almost lines up (beam axle mk4 to beam axle B5). The voshmod on fwd seemed overkill for my purposes.

I got my hubs from a pnp fwd C4, seen quite a few of them actually here in SoCal yards. Haven't installed any of it yet though...

[Creechy]

Another option for FWD rear brake upgrade would be the B6/7 rear carriers and the early fwd Phaeton calipers (not sure you got the fwd phaeton in America ). This would keep the calipers the correct way up.

[Blazius]

I find the fwd rear brake kinda ... waste of money, the 245 mm is good enough, just slap a decent brake at front and it should fine, there is basically no weight back there.

[Creechy]

B7 S4 fronts and standard rears never felt good, to much dive. Changed the rears to B5 S4 calipers with Rs4 carriers and 310mm discs, now brakes very balanced and stable.

[A1 A2 German]

Anyone comes across junkyard C4's on the cheap grab'm for me.

[Mattr567]

Anyone comes across junkyard C4's on the cheap grab'm for me.

One thing I did find at the yard that might fit our needs is the rear calipers off a Fiat 500 Abarth. They look identical to Mk4 GLI calipers (even the same paint) but the line is a bit different. Most importantly however the handbrake arms line up with our cable as it also routes above the beam axle (while Mk4 GLI doesn't as it routes the cable under the beam axle so it pulls from the bottom).







I may try to reroute my handbrake cable around the bottom of the beam like Mk4 to avoiding needing to lengthen the stock line (mk4 gli and B5 fwd share the same banjo) because swapping the calipers left to right etc to make the GLI arms line up to pull from the top would put the line bolt location on the GLI caliper facing the opposite direction, so it needs more length to reach around the top of the caliper.

[Blazius]

Recently found that there is another BBK path. WILL bolt on without upright swap apparently confirmed by one user:

I can't post in this thread, but those calipers are straight bolt on to the older strut. They can be found on mk1 TT v6 and Golf 4 r32. Calipers are the same as b5 rs4 and some mercedeses and bmw's, carriers have to come from golf or tt to bolt up. Like you said, bigger wheels are needed. it's 19 cm or 7,48 inches from the middle of the cv shaft to the furthest point of the carrier.

I haven't actually run them on my car as i have 16 inch wheels, but i have tried them on. I have B6 s4 front discs for them which need to be turned down about 2 mm in radius to fit. And then you also need 1 or 2 mm spacers between the carrier and the strut.

The only negative is that they are super heavy as they are made of steel not some aluminum compound.

3.2 L Audi TT brakes from 2003-2006 ish

334x32 mm rotors.
2 piston caliper - 41mm ish piston dia.

2640.5 mm2 piston surface area

It has short mounting hole distance (94mm for B5 steel spindles) which means it should bolt straight to steel B5 spindles but its unknown. 17 inch wheels are required.

P/N's:

8N0615123A - caliper left
8N0615124A - caliper right
8N0615125A - carrier left
8N0615126A - carrier right

8N0615301B - Rotor left 334x32
8N0615302B - Rotor right

ATTENTION: These rotors are 5x100. You need to redrill them or use MB rotor 1294212112 , which has correct pcd of 5x112, same thickness and diameter.

brake pads: 8N0698151D

Brake line change ? - unknown possibly I have to guess, the thread is the same as many others M10x1. Stock part number is 8N0611707B. Does not need banjo.


pictures (s3 8L):

Rotor vs 312mm

[Migzvp]

Hi guys. I tried to read as much as I could but just wanna confirm some stuff. I have an 01 a4 and just picked up 18z calipers and rotors. First question is well these clear my winter wheels which are 17s. Also wanna confirm the part number for the apikol bracket since I wanna avoid swapping uprights

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[Bordom]

Hi guys. I tried to read as much as I could but just wanna confirm some stuff. I have an 01 a4 and just picked up 18z calipers and rotors. First question is well these clear my winter wheels which are 17s. Also wanna confirm the part number for the apikol bracket since I wanna avoid swapping uprights

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Depends on which wheels you have. B5 S4 Avus wheels work with a large spacer iirc.

Allroad factory wheels are 17" and will clear 18z without issue. Wheel weight placement is also going to be a big issue.

I have no experience with Apikol so I couldn't tell you.

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[Migzvp]

Depends on which wheels you have. B5 S4 Avus wheels work with a large spacer iirc.

Allroad factory wheels are 17" and will clear 18z without issue. Wheel weight placement is also going to be a big issue.

I have no experience with Apikol so I couldn't tell you.

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These are the wheels I have now

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[Bordom]

These are the wheels I have now

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More than likely will have to use spacers.

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[Migzvp]

More than likely will have to use spacers.

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Yea I figured that. Thanks

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[fhopsk]

I ordered the kit from ecs tuning with the Audi TT front carriers and plain rotor set, but it also apparently comes with 4 2mm spacers/washers. Ive never seen any mention of using spacers when doing this upgrade? Don’t I simply install the tt carriers the same way as what is already on my b5?


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[zatta]

Anybody know if B8 Q5 brakes are a direct fit? The OEM brembos with 345mm rotors.


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[Bordom]

Anybody know if B8 Q5 brakes are a direct fit? The OEM brembos with 345mm rotors.


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B8 brakes will only fit with B5 S4/C5 A6 knuckles.

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[zatta]

B8 brakes will only fit with B5 S4/C5 A6 knuckles.

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Sorry about my lack of knowledge but I’m assuming c5a6 knuckles bolt directly up to the B5 A4? And the B8 brakes are direct bolt on to c5a6 calipers?


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[Bordom]

Sorry about my lack of knowledge but I’m assuming c5a6 knuckles bolt directly up to the B5 A4? And the B8 brakes are direct bolt on to c5a6 calipers?


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Depends on knuckle. There's specific requirements for B5/C5 steel/aluminum knuckles. One of which requires a different straight lower control arm.

The B5 S4 and C5 A6 share the same caliper mount ear spacing and wheel hub offset, which is also very similar to the newer B8 cars.

You cannot use A6 calipers with B8 rotors. I recommend you start doing more research on the differences with steel and aluminum B5/C5 knuckles and brake upgrade options.

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[zatta]

Depends on knuckle. There's specific requirements for B5/C5 steel/aluminum knuckles. One of which requires a different straight lower control arm.

The B5 S4 and C5 A6 share the same caliper mount ear spacing and wheel hub offset, which is also very similar to the newer B8 cars.

You cannot use A6 calipers with B8 rotors. I recommend you start doing more research on the differences with steel and aluminum B5/C5 knuckles and brake upgrade options.

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Yeah just trying to figure out my options for budget BBK for my B5, and I meant to say B8 calipers bolting up to the knuckle not just the rotor. I have a C5A6 parts car which is mainly why I’m curious.


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[trep13]

I was on 17" celebration on s4 b7 brakes (on my b6)

I want same or better, but clear the Celebration again on the b5

17z are the ones..?
Or i can get better for the buck?

I really want them clear 17

And true, its perfect flush fit on these Celebration!! Haha

True.

I would like to mention that 17z's clear 17" Celebration wheels though. It is very tight, but they clear.

[A1 A2 German]

Voshmod 300mm 330mm rear Big Baller brake kit onto Audi A4 B5 Fronttrack Front Track Front-Trak:

By an odd set of circumstances the kit fits....

Stripped down spindle flange, you can see the abs speed hall sensor top middle:


In the Voshmod mod bracket you will make a small relief to clear the abs hall sensor (30 seconds with grinder) and the magic happens that by sheer accident that you do not install it infront of the spindle flange like normal, yet behind it. Dust sheilds from Audi C4 are cut down to size to clear the 17z's and e-brake caliper. It helps to install the Voshmod bracket front side first, to see everything, line everything up then move to the back. This looks busy yet majority of this is all stock hardware, less that little fabbed up bracket bottom left I talk about below.


Fronttrak spindle flanges are smaller than Quattro...so when you go to bolt the caliper side of the Voshmod bracket to the spindle flange there's nothing there to mount to so made these simple brackets that tie the spindle flange to the Voshmod bracket. Again, kinda easier to make this little bracket once up front, then when you bolt the Voshmod bracket in rear, just add spacers.


Throw away the large oem rear all in one hub assembly and slide on Audi C4 hubs that look like this, which allow you to run normal rotors. Shout out to Mattr567 for shipping me a set!


By sheer accident of placing the Voshmod bracket behind, the 17z calipers requires no spacers of the Brembo 17z's, now to be fair the rotor is not dead centered within the Brembo caliper but still works out...if you shimmed the caliper outwards to center the rotor you'd end up needing decent sized wheel spacers to clear the calipers as you'd have to space the calipers outwards into the spokes. This works by sheer accident again as Brembo 17z's allow a huge amount of forgiveness to run the rotors far to the right or left of dead center...most rotors give 0mm's to play with:



I did have to space out the e-brake calipers with longer bolts and ~40mm spacers, off the Voshmod bracket to get everything to line up, you can kind see the long spacers as no longer bolts directly to the Voshmod ears:





The only modifications you do are pretty easy, get the donor Audi C4 hubs (just slides on), make a small dimple clearance grind cut on the Voshmod bracket to clear the abs hall sensor that sticks out of the spindle flange (seen in pic #1), make some kind of small bracket to help secure the caliper side of the Voshmod bracket to the oem spindle flange (pic #2 & #3) and space out the e-brake caliper ~38-40mm away from the Voshmod bracket. I did end up using 5mm spacers to clear the 17z Brembos, to be clear even up front I had to do that with a straight forward setup...remember clearance can simply just be spoke design so if I had different wheels I may not need 5mm wheel spacers.

[clapincd]

I just purchased a set of 18z front calipers that I plan on rebuilding and installing on my B5 A4 Avant along with the 330x328mm AMG rotors and creation motor sport brackets. I currently run 17" wheels on my setup and was wondering if anyone else had done the 18z upgrade with that wheel size.

[GoFundMyGas]

Get uprights. Then order 00 straight control arm. Do not get the 01-01.5 arms as the balljoint is fatter.

EDIT: 00 S4 control arms. Not A4

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Hey, upgrading my original caliper pushed out with 312mm discs with the help of TT carriers, to an aluminium upright set up with 18z. I just wanted to make sure that with a 2001 aluminium upright, I am supposed to get a pre-2001 lower front control arm. Would that be TRW JTC343 or JTC980?

and will the C5 4.2 17in Fat Fives clear the callipers

[walky_talky20]

Aluminum uprights need the "small" tapered ball joint size. Steel uprights use the "big" taper.
There are also 2 different widths of the center bushing (where the shock fork bolts to the control arm). B5, C5 and D2 use the "wide" size, B6/B7 use the "narrow" size.

There are basically 3 different control arms:
Small Taper/Wide Bushing - 4B3-407-151 C or E or K, AKA: JTC980 - Fits Early 2000 B5 S4, D2 A8/S8, Late C5 A6, B5.5 Passat
Small Taper/Narrow Bushing - 8E0-407-151 M or R, AKA: JTC936 - Fits B6 and B7 A4/S4/RS4

Big Taper/Wide Bushing - 4D0-407-151 H or P, AKA: JTC343 - Fits All the Steel Upright cars: All B5 A4, B5.0 Passat, Early D2 A8, Early C5, Late 2000+ B5 S4.
Big Taper/Narrow Bushing - These don't exist. I almost made these once to run used B6 front coilovers on a B5 with Steel uprights.

If you want to run aluminum uprights, you need "Small Taper". If you want to run front shocks made for a B5 chassis, that's "wide bushing". So you would need JTC980.