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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Suspension | Chassis | Brakes > Replacing Shockbreaker
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      11-19-2021, 11:53 PM   #1
free2d
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Replacing Shockbreaker

Hi
My F30 335i stock sedan suspension are giving up soon.
I was wondering my sedan can fit the
Genuine BMW Retrofit Kit Sports Suspensi - 33502320981 for F30 335i.
Can the stock springs be use together with this kit since it does not come with spring?
Must I recode the car?
Thanks.
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      11-20-2021, 05:05 AM   #2
SuperLomi
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1) Do you have ECS? This kit does not retain ECS - it is standard hydraulic dampers. So you would need a ECS delete kit and code it out I think.

2) these dampers will over damp the stock springs, even the m-sport, producing a harsh ride. You can buy the kit and springs together. Best place seems to be getbmwparts.com

3) If your car is not an M-Sport, the kit recommends sway bars also (same bars as M-Sport).



If you’re not trying to improve performance, and just need new struts, look into the bilstein b4 or b6. I would probably say b4 for non-m sport, and b6 for m-sport.
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      11-20-2021, 05:21 AM   #3
free2d
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Mine is M-Adaptive suspension with sensors cables.
I need to replace more than the shock absorber.
According to dealer diagnose, Spring strut, Guide support, spring pad, damper all need to replace. That's why looking at the kit.
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      11-20-2021, 05:28 AM   #4
SuperLomi
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If you want to retain the adaptive suspension (ECS) this kit will not work.
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      11-20-2021, 07:01 AM   #5
free2d
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I will ask other mechanic to check again to see whether change only the struts. That will be easier.
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