Vibration when braking M5
Discussion
I bought a 2012 M5 from BMW 3-4 weeks ago. The car has 16k miles on it - and its fabulous.
When i test drove the car prior to buying it, upon braking from motorway speeds say 60mph, the steering vibrated quite a lot.
During their prep work, the dealer said that the vibration was due to the front discs and pads and put new ones on the car before i picked it up.
I have done around 500 miles and the vibration is still there - at first i thought it was just in my head but its definitely there, if i let go of the steering you can see it vibrate on braking. Its not there all the time. Its not there when you brake from low speeds up to 40mph either. Its only there when i brake from 60mph.
I have called the dealer and told them that the issue that was there before i bought the car is still present. The car is booked in on the 15th.
I'm thinking it can't be the discs or pads, these are brand new.
Could anyone suggest what this is - or has experienced it?
I'm thinking it could be something load related ie only apparent when braking from speed? So control arms? Bushes? Ball joints? Could it even be a rim thats not true round but wouldn't that be apparent at all speeds?
Cheers
When i test drove the car prior to buying it, upon braking from motorway speeds say 60mph, the steering vibrated quite a lot.
During their prep work, the dealer said that the vibration was due to the front discs and pads and put new ones on the car before i picked it up.
I have done around 500 miles and the vibration is still there - at first i thought it was just in my head but its definitely there, if i let go of the steering you can see it vibrate on braking. Its not there all the time. Its not there when you brake from low speeds up to 40mph either. Its only there when i brake from 60mph.
I have called the dealer and told them that the issue that was there before i bought the car is still present. The car is booked in on the 15th.
I'm thinking it can't be the discs or pads, these are brand new.
Could anyone suggest what this is - or has experienced it?
I'm thinking it could be something load related ie only apparent when braking from speed? So control arms? Bushes? Ball joints? Could it even be a rim thats not true round but wouldn't that be apparent at all speeds?
Cheers
I have no real way of knowing how thorough they were. The discs looked new. I insisted on a geometry and they said they did it. I did break in the discs properly and made sure i cooled down the discs before stopping.
The car goes in on the 15th, I am uncertain whether to make suggestions to them (ie control arm, rims, warping) or to leave it to them to look at it and resolve. I am never sure if it gets their back up if a customer tries to tell them what to look for when they're meant to be the experts.
Either way, im going to stand my ground and insist its covered by them.
The car goes in on the 15th, I am uncertain whether to make suggestions to them (ie control arm, rims, warping) or to leave it to them to look at it and resolve. I am never sure if it gets their back up if a customer tries to tell them what to look for when they're meant to be the experts.
Either way, im going to stand my ground and insist its covered by them.
The car is with the dealer and they reckon the discs are warped - so they're replacing them. They supposedly did that pretty delivery to me too. I can't think they put new ones on previous delivery and are doing so again now. The hubs look new and the discs looked new when 8 bought the car. Lets see if this fixes the issue.
I assume the running in for the discs is as for other cars in a series of braking from 60 to 20 with cooling off before I stop?
cheers
I assume the running in for the discs is as for other cars in a series of braking from 60 to 20 with cooling off before I stop?
cheers
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