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04-03-2023, 02:50 PM | #1 |
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Going to the extreme for a NASTY E90 Dash rattle
At some point in my ownership, the car developed a dash rattle (attached). I never did any mods to the interior before it started but I did have Ohlins installed and the windows tinted (including the windshield) shortly before I noticed it so there could be a connection however, myself and others who've ridden in the car all seem to believe it's coming from the dash.
It's a metallic twangy sound like a thin metal bracket that's pulled back then released. It's not always there, just rough pavement. Please give it a listen below! Over the years, I've done things like removed the dash speaker cover and the nearby sensor, instrument cluster, climate controls, dash trim, nav screen, and driven the car pressing on different things with no difference. Before installing an Apple multi-media box I removed a lot of major assemblies in the center console and added foam to some areas that looked like it could be causing it and did numerous drives while pressing, and exploring to see if anything would make a difference--nothing! It's been torn down, tapped, poked, flicked, etc. to find anything lose and foam put in place to limit any movement but so far no luck. I'm DESPERATE, please comment if you have any suggestions on where to look/focus! Audio 20sec (Removed the video because it was a considerably larger file size. In the video, I'm traveling down the freeway over different pavement types at around 60mph while filming the center of the dash just below the windshield then hovering closer to the instrument cluster hump then back, nothing that really helps TBH.) Last edited by davedNconfused; 04-03-2023 at 03:02 PM.. |
04-03-2023, 04:13 PM | #2 | |
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davedNconfused33.00 DrFerry6748.00 |
04-03-2023, 07:27 PM | #3 |
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OP, I feel your pain. Few years ago I had the exact same problem. Similar sound, seemed to be coming from dashboard area below the windscreen. Mine was more intermittent and somehow seemed to be temperature related (less likely to happen on warmer days). I stuffed carpeting down between the dash and firewall. Foamed/taped/lubed anything with a contact surface on the upper dashboard. No difference. Then I decided to pay a professional to take the dash apart to check for broken clips/mountings, which led to me rewrapping the dash in leather, which then led to rewrapping the entire interior in leather and alcantara (Might As Well Syndrome at its finest). None of it fixed the problem, and there were no broken clips in the dash.
Anyhoo, several thousands of dollars later, the problem turned out to be some loose exhaust heat shields under the car. Some of the heat shields had missing screws/clips and were vibrating and transmitting that vibration into the cabin. Tightening and replacing the missing screws made the sound go away. $5 fix for missing screws. I hope this solves your problem also. |
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04-03-2023, 07:43 PM | #4 |
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I wish to someday develop this sort of sheer determination 😂
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04-03-2023, 07:50 PM | #5 |
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04-03-2023, 07:57 PM | #6 |
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04-03-2023, 09:21 PM | #7 | |
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I've circled everything where I'd check first for the issue. On the first top two circles, the metal bracket has a foam that slides between the dash. If that plastic section on your dash is cracked or damaged, it will leave a gap that will make the dashboard rattle. The rest of the circles, make sure the bolts and screws that go there are secured and tight. What you could do is also add a layer of Fire Resistant Automotive Felt to those metal brackets which will help dampen the material from rubbing against the dash. Looks like you have an extended fox red dashboard, which I just recently also swapped into my own FR car. Quote:
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04-04-2023, 02:33 PM | #8 |
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my god i feel for you. had a similar rattle in my jeep grand cherokee and decided it to just sell it. didn't even get as far as taking anything apart. just the subtleness of the rattle made me think it was going to be near impossible to find it.
i wish you luck and hope you find it. i managed to fix all the rattles in my e92 m3 from cupholders and a metal bracket underneath the CIC unit |
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04-05-2023, 08:14 AM | #9 | |
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04-13-2023, 08:14 PM | #11 |
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Shot in the dark but I had an intermittent noise coming from my dash and it turned out to be the driver cupholder where it slides into the dash. Maybe try removing them completely and see if the noise goes away?
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05-03-2023, 10:41 AM | #12 | |
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05-03-2023, 11:19 AM | #13 |
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I had a few loose/missing screws/fasteners in the red box area. Some were at the exhaust heat shielding, some were at the black underbody panels. I don't know which one exactly caused the noise, but after I replaced any missing screws and tightened everything up the dash rattle went away.
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05-03-2023, 03:39 PM | #14 | |
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'08 E92 M3 DCT Melbourne Red/Bamboo Beige Leather/EDC/SSP Spec-R DCT clutch discs/SSP Pro-Gold DCT Fluid/Quaife LSD/3:45 Final Drive by Diffs Online/BE Bearings & ARP Bolts/Vibra Technics Engine Mounts/M3 World HFC X-Pipe/LUX H8 180/BPM Sport DCT Tune/PFC Z-Rated Pads/ECS Brass Brake Caliper Bushings/Alex Shop Solid Sub-frame Bushings/Motul 600/Tint
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05-03-2023, 04:06 PM | #15 |
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I hope to god seeing all you have taken out its not as easy to fix as it was for me.......
https://www.m3post.com/forums/showthread.php?t=1060705
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07-01-2023, 09:33 PM | #17 |
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Subbing for updates!
Your audio reminds me exactly something similar to mine, except I don’t get that metallic “twangy” of thin metal. I hear the same EXACT “clunk” when you hit those bumps……and I’ve been trying to chase the entire engine bay for months now. Getting to the point where I wonder if the clunk is actually behind the dash or not… keep thinking it’s suspension related due to the nature of the clunk, but basically everything in the engine bay is tight down to the windscreen wipers. (Around 35 seconds into the video, shifting from 4-5th, you’ll hear the clunk, then see the car get unsettled through the bump. I can replicate it at this exact bump on my street every time……) View post on imgur.com |
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04-26-2024, 07:29 AM | #18 | |
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