Could be the hubs. Mine had an axial throw of 0,02-0,03 mm which I thought wouldn’t affect the discs. I filed a complainment to VW regarding warped discs and they blamed the calipers. Told me one of eight pistons was a bit sluggish. With new calipers and two sets of discs later they found what I had meassured before the complainment, a warped hub. The last pair have not warped after the typical 5000 km mark as before. So at least the floating 365 mm discs are very sensitive regarding straight hubs.
I think the ones I just fitted on the front are TRW, they were significantly cheaper than the genuine parts I've previously bought, but the performance is at least as good, with less brake dust. There's a big difference between quality and cheap parts when it comes to brakes, cheaper rotors will be much more likely to warp.
Just the bigger carrier with the bigger rotors on the front. Didn't bother with bigger for the rears. I bought Red Stuff pads.
That being said, it would be great to see a basic writeup with pics of the fronts and rears being changed. I ordered and received some new slotted/drilled rotors with ceramic pads. When ordering, I just used the GTI as the model, since it uses the same brake rotors as the TDI, 312mm F, 272mm R - IIRC. If I have time, I will get some pics and write a rudimentary writeup on it. Not sure if I have time/patience to tackle this myself so I may just have my Audi/VW guy do the work (he has many more tools and 2 lifts). In any case, I will try to get some info and pics in here.
Just discussed this last week. I side with my VW dealer on it. They recommend just replacing the rotors, its really not that much more than having them turned, considering you almost guarantee no pulsation, no shimmy or shudder and more even brake wear.
Mine are 288 fronts (yeah, I measured) and combined with the pitiful rears the whole systems is not (as I've read many times) "sufficient for daily driving". Too many times I've worried I won't stop in time. Too many times I've come down an average hill with definite fade that made me worry should an animal dart out in front of me. I want something akin to my GTI's brakes. Not something that will stop a freight train but just something I know will stop. And stop firm every time. Definitely OEM . I'd rather not have red but whatever I have, it will have to match front/rear. After reading the limited information I can find across multiple forums, nothing has mentioned swapping the front TDI brakes (if they are actually 310mm) over to a 2.5l. It would seem that if the caliper is the same 2.5 to TDI, all you would really need is the rotor and the TDI carrier, correct? Regarding the rears, nothing seems available straight off the OEM shelf, except GTI, correct? Any non-red options there?
This problem started after I changed the rear VW brakes rotors and rear VW pads and changed all four wheels with remanufactured VW Phaeton wheels.
Just noticed yesterday my front rotors are pretty scored too - got a screw in my tire and the repair shop commented on the rotors too.
Imperfections in either the brake rotors or pads making gouge marks in my rotors
Here's a shot of my rear rotors. They both look like this. To quote my service manager "we looked at some other cars and they all look like this, so this looks like normal wear". Not buying it. My b6 passat has 180K miles and those rotors are super smooth.
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Brake discs Zimmermann or POWER STOP
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Brake discs Brembo or POWER STOP
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Brake discs Zimmermann or STOPTECH
Brake discs Zimmermann or OEM Volkswagen
Brake discs Zimmermann or EBC
Brake discs Zimmermann or Raybestos
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