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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Feb-10-2018, 08:56:11 PM   #1
stogybear
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Default What’s the best way to reduce NVH?

My car is a tick over 81k miles and I’m starting to feel a lot of noise and vibrations. I plan on swapping the control arm bushings and rtabs soon, but is there anything else that will impact nvh dramatically?
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Old Sat, Feb-10-2018, 09:50:43 PM   #2
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Default Re: What’s the best way to reduce NVH?

What sort of noise/vibrations?

Pretty much any rubber has some effect on nvh. Diff/trans/engine bushings, csb and guibo should pretty much take care of the drivetrain
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Old Sat, Feb-10-2018, 09:54:27 PM   #3
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Default Re: What’s the best way to reduce NVH?

The steering wheel vibrates a bit at highway speeds. Hitting bumps feels really rough too.
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Old Sat, Feb-10-2018, 09:57:14 PM   #4
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Default Re: What’s the best way to reduce NVH?

Quote:
Originally Posted by stogybear View Post
The steering wheel vibrates a bit at highway speeds. Hitting bumps feels really rough too.
Have you replaced the FCABs?
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Old Sat, Feb-10-2018, 10:10:08 PM   #5
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Default Re: What’s the best way to reduce NVH?

Tires, avoid low-profile wheel/tire setups, bushings, alignment, suspension stiffness.
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Old Sat, Feb-10-2018, 10:46:10 PM   #6
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Default Re: What’s the best way to reduce NVH?

Is your car modified? What age/mileage are the following:

fcabs
rtabs
rear shock mounts
front shock mounts
spring pads
bumpstops
shocks
steering guibo

Also, what tires/sizes/mileage?
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Old Sat, Feb-10-2018, 11:08:57 PM   #7
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Default Re: What’s the best way to reduce NVH?

Quote:
Originally Posted by stogybear View Post
The steering wheel vibrates a bit at highway speeds. Hitting bumps feels really rough too.
Quote:
Originally Posted by EricSMG View Post
Is your car modified? What age/mileage are the following:

fcabs
rtabs
rear shock mounts
front shock mounts
spring pads
bumpstops
shocks
steering guibo

Also, what tires/sizes/mileage?
Good starting point. I would look at the tierod and balljoints too.
I'd just do everything at once cause as soon as you replace one thing, something else will wear out or the part you replaced won't be the culprit.
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Old Sat, Feb-10-2018, 11:32:49 PM   #8
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Default Re: What’s the best way to reduce NVH?

I'm surprised no one has suggested yet the ultimate mod to make your M3 more compliant... changing out your E46 chassis for an E92 one!

Quote:
Originally Posted by icecream View Post
Good starting point. I would look at the tierod and balljoints too.
My car's steering currently has a dead spot/sloppiness that I find unacceptable, and I assumed the problem was just the steering coupler was worn out, but reading around a little bit in threads like these has put the idea into my head that other suspension components could contribute to this as well. Is there an easy way to pinpoint which items are the culprits behind my sub-optimal steering? Or should I just change everything out at once to be safe?
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Old Sun, Feb-11-2018, 03:42:26 AM   #9
stogybear
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Default Re: What’s the best way to reduce NVH?

Quote:
Originally Posted by EricSMG View Post
Is your car modified? What age/mileage are the following:

fcabs
rtabs
rear shock mounts
front shock mounts
spring pads
bumpstops
shocks
steering guibo

Also, what tires/sizes/mileage?
Just bilstein pss9 coilovers that have about 40k miles on them. I think my front tires are getting old and dry too at this point. Good list, thanks,
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Old Sun, Feb-11-2018, 03:59:51 AM   #10
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Default Re: What’s the best way to reduce NVH?

call me crazy but at that mileage Id consider motor and transmission mounts as well.
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Discussing What’s the best way to reduce NVH? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)