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2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) General G20 Sedan / G22 Coupe / G26 Gran Coupe Discussions Low volume rhythmic thump coming from the front

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      02-07-2020, 08:20 PM   #1
greekcs
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Low volume rhythmic thump coming from the front

I'm trying to pinpoint the source of the noise on my 2020 M340i. I hear what sounds like a thump thump thump from the front end that gradually increases with speed as I go faster. I tried swapping out my Run-flats for a set of Goodyear Exhilarate to alleviate the issue. I returned to the tire shop another 3 times to have them check the balance on the tires and even went as far as having them replace one of the front tires, thinking it was the culprit. Alas, the noise is still present. I have included a sound clip of the noise.

I'm driving on newly paved highway with no bumps or expansion joints.
https://soundcloud.com/chris-sakella...i-xdrive-noise
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      02-07-2020, 08:48 PM   #2
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Sounds like a bad ball joint maybe?
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      02-07-2020, 09:07 PM   #3
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A few weeks after having winter tires installed I started hearing very noticeable tire noise, especially at highway speeds. God forbid I take an exit ramp at "enthusiast" speeds because it gets even louder. It's similar to the sound of a pickup truck or Jeep with those big oversized off-road tires riding next to you on the highway. I just assumed that my new winter tires were garbage (Pirelli Winter Sottozero 3 Run Flat Run Flat XL). Now you've got me wondering if it's really the tires. I guess I will find out in 2 months when I put my summer wheels & tires back on.
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      02-12-2020, 07:51 AM   #4
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update: I dropped my car off at BMW today. They're going to place the car on a lift and simulate driving at various speeds. I hope they can pinpoint the source of the mystery noise.
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