Vibration from rear when braking at high speeds off mark on rotor.

[Diesegas]

Hi there, i changed both sets of rotors and pads on my BMW 4 series as the old ones were pretty budget and squealed like hell! It’s about 6 weeks later and I’ve just started to get a shimmy / vibration in the pedal in the car when braking at higher speeds (60mph+) the steering wheel doesn’t appear to be vibrating and you can feel it more when sitting in back.

I’ve noticed one of my rear rotors has a black line on it, could this be related to the vibration? I’ve tried to get a bit of sandpaper to see if it comes off but it doesn’t!

 

[CharBaby]

Make sure the hubs beneath the rotors are perfectly clean. The rotors may not be seating flush to the hubs.

 

[HemiBenny]

Is the rotor cracked and collecting pad material in it. I’m trying to expand the picture to look at the outside edge of the rotor but it makes the picture a little fuzzy. It looks like a fine line continues over the top edge of the rotor.

 

[thescreensavers]

Pad Transfer, does this car have automatic parking brake?

Imo buy new rotors and buy premium pads. You could buy a flex hone for rotors but that's going to be a bit of work.