Rear brake discs heavily rusted | VW

Hello Uwe, there's nothing you can do about it, depending on the compound, they corrode very quickly. Then the brake is used less than the front one.

Hello Uwe, I know this problem too. I've mostly seen it on ATE brake discs. But this was also due to the brake pads, the pad started to corrode. There was also an internal TPI in the VAG Group, ATE pads charge 8135(4) were affected. The rear brakes were replaced under warranty if they started to squeak a lot. Many greetings Jonathan

Hello Uwe, this problem is often encountered with VAG vehicles that are driven a lot on short journeys, trips with little load, or a high proportion of highway driving. This only affects the rear brakes and has already led to problems during the first German vehicle inspection (TÜV) for acquaintances. Unfortunately, this is unavoidable depending on the driving profile.

I have the same problem with my parents' Zafira. It's because they always step on the brake pedal so lightly. I had to change the rear brakes every time for the MOT (TÜV). Now I drive it once a month and do 1-3 emergency stops until the rear discs are clean again. Of course, I give the brakes time to cool down in between. Since then, the brakes have lasted for 4 years now.

If you regularly brake harder, so that the rear brakes also have something to do, then it could get better.

Experienced mechanics can also use the electronic parking brake to free brake discs from rust.

After once messing up a set of rear brakes (driving with foresight and braking gently), I now brake hard on the deceleration lane of the freeway from about 130 km/h down to ensure I can safely make the exit curve (usually 50 km/h, but of course paying attention to the traffic behind). Since then, I haven't had the problem with rust on the rear brakes anymore.

Think of your brakes as a high-performance athlete.

If you use them very gently, the brakes won't be challenged.

With gentle use, at least 3-4 times a month, brake from 100 km/h to 50 km/h 2-3 times in a row until the ABS kicks in.

Provided there is no one behind you.

You will see that when you get into an emergency situation, the brakes will work perfectly.

Regards,

Christian

This is a typical problem with rear disc brakes, often found in vehicles driven by elderly people or those who don't drive much. Usually, the braking is too hesitant, and the brake pads are often stiff in their guides...