A6 c7 pulsating brakes & wheel vibration cure

[James200]

[nitch]

Really interesting, thanks. It could be that mine have loosened so will have a look.

Did a quick google and found guide in case it's useful - https://www.audiworld.com/forums/a6-c7-platform-discussion-194/2015-caliper-guide-pin-bushing-corroded-2974183/

[gurra76]

Thanks for the tip 👍🏻

but to be clear, it’s for the front calipers not the rear?

is it possible to have wobble and vibration from front but not feel it in the steering wheel?

[James200]

I went through the same issue, I replaced the front discs twice, pads twice, and still got the vibration. I tried stepping hard on the brakes, my mechanic advised against that, he said the discs would heat distort and make it worse. The only solution was to change the bushings, it is easy to do, you can do it with the calipers on the car, just lift them off the carrier, a bit of manipulation, and then you can get the bushings out. To get them back in I used a clamp, the kind you squeeze with a pistol grip. This is WAY less expensive than changing discs and pads multiple times. The difference in friction between before and after on sliding the pins through the bushings was really significant.

[James200]

That link shows exactly what to do, and yes, it is the front calipers, apparently Audi knows about this. I used a wire brush that is used for cleaning pipe fittings before soldering to get all the crud out of the caliper, and really greased the bushing and where it installs in the caliper to try to keep the water out.

The shake/wobble on my car was so severe I thought that people around me would notice!

[gurra76]

Ok thanks 

will give it a try before go ahead and change everything 

[alpha omega]

On 2/10/2025 at 10:27 AM, cliffcoggin said:

When steel rusts it expands, thereby pushing adjacent parts away from each other. That's why rusty bolts are a swine to remove and brake discs are pushed out of alignment.

exactly clifford. i had to get the garage to free the caliper holding bolts as my snap on would not shift them and as above cleaned and sprayed the area

Edited yesterday at 05:06 AM by alpha omega

[nitch]

Keep us updated Gustaf. 

Does anyone know if the brake calipers are the same on all models?

I've got a 2015 BiTdi Allroad so trying to identify the correct parts for it.

Thanks