steering wheel vibration

M

MACM

New member
Don't know if anyone has come across this but adter a bit of hard driving I'm experiencing a quite serious vibration on the steering wheel. When this occurs and backing of the hard driving it goes away. Initial thoughts that it may be brake related?? :x

Car is 2007 Z4M with 20K on the clock.
 
looks like you need your front wheels balanced ...i would try this cheaper option as i had similar issue ...it worked a treat ... :D
 
Thanks for the information, ballancing already checked and OK. Unfortunately it's not apparent all the time, only after some hard driving and breaking.
 
I had something similar before and it turned out to be a defective tyre with a slight bulge under the tread, impossible to see, but could be felt by running your hand over the tread round the tyre. Heat (and associated increased psi) from harder driving could be allowing a bulge to develop? The replacement went the same and was put down to a defective batch which was sorted by the outlet.

Vibration from an imbalance will tend to occur at a particular speed, or speeds. The vibration from the bulge was more random across the speed range and was not always present but felt similar. Worth eliminating anyway.
 
Since you say it only happens after hard driving and braking I'd be looking to see if you are overheating the pads and depositing material on the disks. this can create significant vibration under subsequent braking. Even sitting at lights after heavy braking with a foot on the pedal will leave deposits on the disk that causes such vibration
 
Thanks all for your thoughts on this matter. I'm loathed to take the car to main the main dealer, but have a very good ind one who I'll discuss it with and see what they recomend. Let you know how this works out.
 
Managed to resolve the matter. I ended up taking the car back to the main dealer who diagnosed a sticking caliper resulting in new calipera and discs. Luckily all this was done under warranty (extended warranty had been taken out), although I was charged for the break pads. Car now going well and racing up to the next service which will be a bit expensive!!
 
Not far off with my diagnosis then. Sticking caliper overheats melts the pad and gives horrible vibrations :)

Glad you got is sorted under warranty, but cheeky for the dealer to charge for pads unless they were already worn out.
 
I'm sure you'd think it was the pikey approach but its dead normal with a lot of vehicles for pistons to stick, and many garages will happily extract the piston, clean, repolish and replace it at a much lower cost than a new caliper... :oops:

This 'module replacement' school of automotive engineering gets on my tits sometimes. :evil:
 
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