Adaptive suspension, parts & problems..

335ier · 03-19-2018, 03:12 PM

Hello all!
My F31 recently developed a problem by the sound I would guess a strut mount at the front. On turning the steering wheel first thing in the morning I hear a donk noise coming from the front of the car. It doesn't always make the noise but if it does it is always first thing. In addition if you drive slowly <10mph it sound like somethings quietly rattling almost like going over really small cobbles but with no feel/vibration at all- everything feels completely normal. My car has adaptive suspension & a good google search doesn't seem to show up top mounts??? I have found plenty but they all say not for EDC

Am I potentially looking at complete new shock absorbers?

Many thanks,

Watsey · 03-19-2018, 03:35 PM

Could be the steering rack. Try gently rocking the steering wheel when the car is stationary and with engine running, just enough to feel resistance off dead-centre, and listen for knocking/clicking.

If that's what you hear, the rack may have some wear on the internal components and will be a warranty repair. Very common, but not dangerous in its current state.

Tengocity · 03-19-2018, 03:38 PM

If it's not the steering rack then could be an ARB drop link. I had a slight knock that could only be heard at low speeds and that's what it was, and it was replaced under warranty.

335ier · 03-20-2018, 02:51 PM

Thanks for the replies

Ill check all those things. Does the adaptive suspension system have separate strut mounts or is it a one part shock absorber?
I ask because I can't seem to find any anywhere?

Panchoa · 03-20-2018, 03:56 PM

Quote:

Originally Posted by Watsey

Could be the steering rack. Try gently rocking the steering wheel when the car is stationary and with engine running, just enough to feel resistance off dead-centre, and listen for knocking/clicking.

If that's what you hear, the rack may have some wear on the internal components and will be a warranty repair. Very common, but not dangerous in its current state.

This post is very timely!! Mine knocks when you rock the steering while stationary, does that mean the steering rack needs replacing? Will i get fobbed off with a ‘they all do that sir’ if i take it to the dealer??

03-19-2018, 03:12 PM	#1
335ier Lieutenant 37 Rep 408 Posts Drives: F31 335d Join Date: Nov 2008 Location: england iTrader: (1)	Adaptive suspension, parts & problems.. Hello all! My F31 recently developed a problem by the sound I would guess a strut mount at the front. On turning the steering wheel first thing in the morning I hear a donk noise coming from the front of the car. It doesn't always make the noise but if it does it is always first thing. In addition if you drive slowly <10mph it sound like somethings quietly rattling almost like going over really small cobbles but with no feel/vibration at all- everything feels completely normal. My car has adaptive suspension & a good google search doesn't seem to show up top mounts??? I have found plenty but they all say not for EDC Am I potentially looking at complete new shock absorbers? Many thanks,
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03-19-2018, 03:35 PM	#2
Watsey Major General 6414 Rep 8,498 Posts Drives: F31 330D sDrive M Sport Join Date: Jun 2015 Location: On sabbatical. iTrader: (1)	Could be the steering rack. Try gently rocking the steering wheel when the car is stationary and with engine running, just enough to feel resistance off dead-centre, and listen for knocking/clicking. If that's what you hear, the rack may have some wear on the internal components and will be a warranty repair. Very common, but not dangerous in its current state. __________________ Current : F31 330sD, remapped, Ohlins Road & Track, Millway camber plates, Quaife LSD, Stoptech brakes + Pagid RSL1 pads all round, Weichers front strut brace, Eibach front & rear anti-roll bars, Michelin MP4S.
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03-19-2018, 03:38 PM	#3
Tengocity General 8566 Rep 19,982 Posts Drives: 911, Cayenne Turbo, Disco 4 Join Date: Sep 2013 Location: Crieff, Perthshire, Scotland iTrader: (0)	If it's not the steering rack then could be an ARB drop link. I had a slight knock that could only be heard at low speeds and that's what it was, and it was replaced under warranty. __________________ Current: Porsche 911 991 C4S, Porsche Cayenne Turbo, Land Rover Discovery 4. Gone...G01 X3 M40i, Cayman S 987, F31 340i, Cayman GT4, F82 M4 CP, Lotus Exige V6, G20 330e, F30 330e, Boxster S 987, F31 335d, Mini Cooper SD, E89 Z4, E90 330d 320d, E60 520d, E46 330d 320d, MX5s, E30 325i
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03-20-2018, 02:51 PM	#4
335ier Lieutenant 37 Rep 408 Posts Drives: F31 335d Join Date: Nov 2008 Location: england iTrader: (1)	Thanks for the replies Ill check all those things. Does the adaptive suspension system have separate strut mounts or is it a one part shock absorber? I ask because I can't seem to find any anywhere?
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