XSeries-forum

I'm with Raj on this one assuming it's under braking & front discs not shaped like Popadoms

Hi there, i had this prob on mine and it turned out to be a sticking caliper n/s as it happens,quite a simple fix
A seal kit off fleabay for £20 odd quid and about 2hrs labour (when it was freezing cold weather),B.O.L. fella.

[quote="Steve Blackdog"]
I don't reckon its the discs.  I have relatively new Zimms and there is no vibs braking at any other speed.

However, I did another test, which was to roll the car very slowly forwards down a steep hill (engine running) and apply the brakes fully. You can feel a clonk, which sounds to me more like bushes than brakes.

I've still not got round to going to the garage yet, but if its a sign that the front brake arm reaction bushes are shot, then I ought to go see the man.
[/quote]

the downhill/clonk test is almost def 100% bushes. I had the wobble for almost 3 years no-one could find it, MOT passed etc. mechanic did downhill/clonk and then did bushes - hey presto no wobble

So Steve Blackdog did you get it fixed?

I have this judder at exactly that speed when braking (65-70mph)
Its not discs or pads and its not the alignment (all checked) but when it was in for an Inspection 2 service a couple of days ago they said the front tension arm bushes are worn and need replacing.

They were certain that this was causing the shudder under braking.

Having them done in a couple of weeks so can report back, but 99% sure that's the problem.

Hi folks

Yes it is the front reaction arm bushes - they are completely shot.  I'm waiting to get the gearbox sorted, then I'll do the bushes.  I hope I can give problem solving a rest for a few thousand miles, then

[quote="Steve Blackdog"]
Hi folks

Yes it is the front reaction arm bushes - they are completely shot.  I'm waiting to get the gearbox sorted, then I'll do the bushes.  I hope I can give problem solving a rest for a few thousand miles, then
[/quote]

I'm always constantly hoping for trouble free driving...lol

I'm looking at replacing these bushes too as I have the same problem. Can you confirm that they are the most forward bushes on the car and attach to the front cross member/subframe? Also I am thinking of useing power flex bushes, has anyone got any experience with these? And 1 last thing, is that the adjusting bolt for the camber that runs through the middle of the bush?

Hi there

This is the brake reaction arm or control arm - it seems to have many names. The bushes are around £20 for after market parts.  My independent BMW guy prefers to replace the arms as he thinks the bushes can be tricky to remove and replace.  There again, his time cost has to be brought into the equation.

Good luck.

Steve

I have just ordered the power flex version at £80. Hope they are not to harsh as some reports I've read!