Car Shudders When Braking

[RSFOURDayz]

Hey.. Just wondering if anyones got any thoughts on a possible cause of car shuddering when braking under heavy conditions, like brakeing from above 100k's. Had new pads front and rear and discs machined and checked for warpage, came up good but still shuddering... Any ideas? Car is a series 2 c34, RB25det auto.

[bentwagon]

Mine does the same, no ideas though.

[stef_1991]

Does it do do it when the brakes are cold too? Brake discs, especially the front can get heat spots in the rotors that are un-machineable. Other than that i would be checking my wheels bolts and front hub nuts mate

[ClassOne]

Wheel balance issue? Wheel bearings ok?

[import_zone]

bearing and ballance nd hub nuts would all cause vibration even when not braking. it would be something brakes. maybe double check caliper bolts if they left any lose, otherwise would be warped rotors. so were not machined properly most likely or have warped since then. have u been through puddles of water after a long or heavy drive? check for discolouration in rotors (ie heat spots)

[RSFOURDayz]

Thanks guys. Have checked bolts and all that in the past and all checked out good, i will re check though i think. I did have a problem with my lhr caliper, it wore the pads down passed the metal backing, while the rh side was fine and i never fixed that i just bought new pads. That wad only the rear though which would only affect the brake pedal and not the entire car right?

[import_zone]

that is right. rears will shudder pedal. nd to fix that wearing problem, remove nd put caliper slide grease on the slide. as slide could be seized. for steering shudder it will be in the fronts.

[Deep Dish V35]

had a similar problem in my previous bmw.

check all the bushes, ball joints, and bearings. particularly lower control arm bushings. then check steering rack mounts and even engine mounts and shock absorbers

[RSFOURDayz]

I think I've narrowed it down to it only happening after continued heavy breaking. Must be getting the brakes too hot perhaps.