E93 M3 Damptronic Suspension Issue

///MPower4Life · 05-18-2021, 12:40 PM

Hello M3post Fam!

I have a 2008 E93 M3 with EDC. I decided to change out the stock EDC suspension with Bilstein B16 Damptronic Kit which is meant for cars with EDC. I had the kit installed by a reputable shop that I have used in the past many times. After installation of the Damptronic kit, the car is riding super stiff in the rear and it seems like the EDC is not working. Upon inspection, we noticed that the rear spring is super compressed while the car is on the ground and the rear shock has zero to no travel when you try to press up on the shock. I have tried reaching out to Bilstein but unfortunately haven't really received much help from them. I don't know if it is a shock issue, spring issue, and/or EDC issue. Has anyone else ran into any problems after installing a Damptronic kit on their M3, preferably a convertible M3? Any advice or help would be great appreciated.

Thanks!

wootloops · 05-18-2021, 07:37 PM

Do you have any pics or videos of the springs on the rear?

Also if the EDC wire is disconnected it will default to full stiffness (but I believe it will also throw a fault code).

///MPower4Life · 05-19-2021, 07:18 AM

The EDC cables are plugged in and the car is not throwing any codes. I’ll be stopping by the shop later today. I’ll take some photos and videos of the rear so you can see how the spring is sitting.

Quote:

Originally Posted by wootloops

Do you have any pics or videos of the springs on the rear?

Also if the EDC wire is disconnected it will default to full stiffness (but I believe it will also throw a fault code).

tbuck · 05-19-2021, 03:36 PM

E93's, as with most BMW verts, are quite a bit different in the rear and many kits of this type will not work properly with anything other than a coupe. Can't say for sure in this case but know that I could not fit coils on either my E36 vert M3 nor my E46 vert M3.

Skers 05 · 06-26-2021, 10:48 PM

With this issue, I would start with the spring. Was it changed when you installed the new kit? Sorry, I'm not so familiar with this kit. Take a picture of the rear spring when the vehicle is on the ground and share it here. If the coils are touching, or close to touching at nominal ride height, you will be limiting the compression travel of the suspension and thus creating the firm ride character you describe.

Redd · 06-27-2021, 12:17 AM

If springs are fully compressed at rest sounds like they sent u the wrong springs.

05-18-2021, 12:40 PM	#1
///MPower4Life Enlisted Member 0 Rep 38 Posts Drives: E46 M3 SC/ 335IS ST/ S54 Wagon Join Date: May 2011 Location: Atlanta, GA iTrader: (0)	E93 M3 Damptronic Suspension Issue Hello M3post Fam! I have a 2008 E93 M3 with EDC. I decided to change out the stock EDC suspension with Bilstein B16 Damptronic Kit which is meant for cars with EDC. I had the kit installed by a reputable shop that I have used in the past many times. After installation of the Damptronic kit, the car is riding super stiff in the rear and it seems like the EDC is not working. Upon inspection, we noticed that the rear spring is super compressed while the car is on the ground and the rear shock has zero to no travel when you try to press up on the shock. I have tried reaching out to Bilstein but unfortunately haven't really received much help from them. I don't know if it is a shock issue, spring issue, and/or EDC issue. Has anyone else ran into any problems after installing a Damptronic kit on their M3, preferably a convertible M3? Any advice or help would be great appreciated. Thanks!
	Appreciate 0 Tweet Quote

05-18-2021, 07:37 PM	#2
wootloops First Lieutenant 355 Rep 361 Posts Drives: 2013 E92 M3 Lime Rock Park Join Date: Aug 2012 Location: Jupiter, Florida iTrader: (0)	Do you have any pics or videos of the springs on the rear? Also if the EDC wire is disconnected it will default to full stiffness (but I believe it will also throw a fault code).
	Appreciate 0 Quote

05-19-2021, 03:36 PM	#4
tbuck Captain 1186 Rep 946 Posts Drives: 2011 E92 M3, 2016 F23 M235i Join Date: Feb 2020 Location: Huntsville iTrader: (0)	E93's, as with most BMW verts, are quite a bit different in the rear and many kits of this type will not work properly with anything other than a coupe. Can't say for sure in this case but know that I could not fit coils on either my E36 vert M3 nor my E46 vert M3. __________________
	Appreciate 0 Quote

06-26-2021, 10:48 PM	#5
Skers 05 Lieutenant 78 Rep 584 Posts Drives: '08 1M Clone, '11 328i, '13 X5 Join Date: Jun 2009 Location: Ann Arbor, MI iTrader: (10)	With this issue, I would start with the spring. Was it changed when you installed the new kit? Sorry, I'm not so familiar with this kit. Take a picture of the rear spring when the vehicle is on the ground and share it here. If the coils are touching, or close to touching at nominal ride height, you will be limiting the compression travel of the suspension and thus creating the firm ride character you describe.
	Appreciate 0 Quote

06-27-2021, 12:17 AM	#6
Redd Brigadier General 3900 Rep 4,164 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	If springs are fully compressed at rest sounds like they sent u the wrong springs.
	Appreciate 0 Quote