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Clanging/Rattling Over Bumps

Discuss problems you have had or are having with your Z4
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woody1987
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Clanging/Rattling Over Bumps

Post by woody1987 » Wed Feb 22, 2017 4:11 pm

Hi all,

Picked up my z4 coupe a few weeks ago. It's fantastic, absolutely thrilled with it. However, since the weather's gotten a bit warmer and having the window down I've noticed a horrible noise when on rough roads, bumps, speed bumps etc. It sounds like there's a bag of spanners rattling around in the boot(there isn't...I've checked!) or a similar sound to driving over loose manhole/drain covers is the best way I can describe it. I'm sure it's coming from around the drivers side/rear wheel area. It's almost silent with the windows up.

Did some searching and came across the common broken spring issue, fit the symptoms perfectly so got it booked into a local BMW specialist. But two technicians have both taken it for a drive and had it up on the ramp and have found absolutely nothing wrong with it. They were familiar with the spring issues and assured me it's not that. They also didn't charge me anything for their time which was nice and advised I take it back in a week or so if it's still bothering me.

I guess I should be pleased but the rattling noise is absolutely awful.

Is there anything else it might be?

Thanks

Mat

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Smartbear
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Clanging/Rattling Over Bumps

Post by Smartbear » Wed Feb 22, 2017 4:16 pm

Hi, check the rear silencer support brackets-the weld can break & cause a noise when going over bumpy roads :thumbsup:
Rob
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buzyg
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Clanging/Rattling Over Bumps

Post by buzyg » Wed Feb 22, 2017 4:23 pm

Exhaust mount or heat shield lose. Though sure they would have checked that.
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Marlon
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Clanging/Rattling Over Bumps

Post by Marlon » Wed Feb 22, 2017 4:24 pm

One would have hoped if its the silencer brackets that the BMW Indy would had spotted it. Sounds like you should have gone out on the test drive with one of them.
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MJJamieson
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Clanging/Rattling Over Bumps

Post by MJJamieson » Wed Feb 22, 2017 4:51 pm

Mine did the same, check heat shields and stone guards behind disks, both prone to rusting round the mounting bolts and coming loose.
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Ducklakeview
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Clanging/Rattling Over Bumps

Post by Ducklakeview » Wed Feb 22, 2017 4:53 pm

Strut top mounts or anti roll bar drop links?

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Clanging/Rattling Over Bumps

Post by megapixelmike » Wed Feb 22, 2017 5:02 pm

had the same noise on my mini changes anti roll bar bushes and drop links.....ok now :driving:
only cost me £100 fitted inc parts

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Clanging/Rattling Over Bumps

Post by BradleyB » Wed Feb 22, 2017 5:18 pm

I had the same in my old Z. Turns out it was where one of the rear springs had snapped and the loose part was trapped within itself, rattling around! Should be visible if this is the case with yours so take a quick look :thumbsup:
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Clanging/Rattling Over Bumps

Post by VRSteve » Wed Feb 22, 2017 6:18 pm

Rear springs.

Its always the rear springs.
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Smartbear
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Clanging/Rattling Over Bumps

Post by Smartbear » Wed Feb 22, 2017 7:22 pm

VRSteve wrote:Rear springs.

Its always the rear springs.
No its not, mine was the silencer bracket :poke:
Rob
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e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

Rufus59
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Clanging/Rattling Over Bumps

Post by Rufus59 » Thu Feb 23, 2017 1:02 pm

There's nothing loose in the battery compartment? Mine had the toolkit loose in there, suspension is stiff enough to give it a good rattle when going over bumps
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