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Technical Topics Suspension / Chassis / Brakes H&R Lowering springs sport

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      01-07-2022, 05:25 PM   #1
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H&R Lowering springs sport

Just got installed H&r sport springs on a 2020 m340 with adaptive suspension. At speeds of around 100-120km/h car shakes violently. Like if it's gonna fall appart. Tech checked over all things, test drove vehicle and can't seem to pin point the problem.

If this has ever happened to anyone please help!!?
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      01-08-2022, 01:07 PM   #2
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you either got a defective unit or a bad install. Most likely a bad install to be honest.
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      01-12-2022, 12:30 PM   #3
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I am starting to think m340i's are not lowered suspension friendly. I installed my H&R springs driven on them for over 3k miles already round trip to NC from FL and back and now out of nowhere I hear constant clunking from the front and cannot pinpoint where it is coming from exactly. Bunch of posts on this noise as well with no known remedy
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      01-12-2022, 04:15 PM   #4
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Quote:
Originally Posted by ChrisRoman View Post
I am starting to think m340i's are not lowered suspension friendly. I installed my H&R springs driven on them for over 3k miles already round trip to NC from FL and back and now out of nowhere I hear constant clunking from the front and cannot pinpoint where it is coming from exactly. Bunch of posts on this noise as well with no known remedy
Do you have shorter or modified bump stops installed?
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      01-12-2022, 04:16 PM   #5
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Quote:
Originally Posted by AddictedTo///M View Post
Quote:
Originally Posted by ChrisRoman View Post
I am starting to think m340i's are not lowered suspension friendly. I installed my H&R springs driven on them for over 3k miles already round trip to NC from FL and back and now out of nowhere I hear constant clunking from the front and cannot pinpoint where it is coming from exactly. Bunch of posts on this noise as well with no known remedy
Do you have shorter or modified bump stops installed?
No
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      01-21-2022, 09:04 AM   #6
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Quote:
Originally Posted by mike@x-ph.com View Post
you either got a defective unit or a bad install. Most likely a bad install to be honest.
After changing all four tires and getting everything checked at à bmw dealer car works perfectly now!
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      01-21-2022, 09:12 AM   #7
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Quote:
Originally Posted by Bimmerbros View Post
After changing all four tires and getting everything checked at à bmw dealer car works perfectly now!
So the issues was caused by old tires?
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      01-21-2022, 09:13 AM   #8
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Quote:
Originally Posted by mike@x-ph.com View Post
Quote:
Originally Posted by Bimmerbros View Post
After changing all four tires and getting everything checked at à bmw dealer car works perfectly now!
So the issues was caused by old tires?
Well michelin replaced my tires because after 1 month they where completely bald in the center
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      03-09-2022, 12:01 AM   #9
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Quote:
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Quote:
Originally Posted by mike@x-ph.com View Post
you either got a defective unit or a bad install. Most likely a bad install to be honest.
After changing all four tires and getting everything checked at à bmw dealer car works perfectly now!
And also getting my alignement
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