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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Suspension Compliance has deteriorated



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      04-14-2017, 12:09 PM   #1
blackhawkk22
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Suspension Compliance has deteriorated

Hey guys Ė lately Iíve been noticing that my car feels more unsettled than usual in Chicago roads. It feels less compliant and not as comfortable on uneven roads. The best way I can explain it when Iím taking an on/off ramp and the car goes over an expansion join/small bump the rear of the car feels like it skips ever so slightly; just enough to make it slightly uncomfortable. Same time last year it wasnít as pronounced, same tires, same wheels no changes to the car.

Before I go ahead and change my shocks, I figured I'd ask here to see what it could be.

Car: 2010 E90 335i RWD with M-sport Package (on stock sport suspension and suspension components)
Miles: ~80k
Aligned in 2016 and the car still tracks perfectly straight.
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      04-14-2017, 03:17 PM   #2
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At 80k is combination of struts/shocks and deteriorating bushings.
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      04-14-2017, 03:20 PM   #3
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im in the same situation... I know i need new shocks what else should I be looking into? I am at 145k miles
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      04-14-2017, 04:04 PM   #4
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Quote:
Originally Posted by feuer View Post
At 80k is combination of struts/shocks and deteriorating bushings.
I posted on Windy City BMW FB page as well and had a few people say it was Rear Trailing Arm Bushings (RTAB). Those are pretty cheap and shouldn't be too big of a deal to change those.
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      04-15-2017, 02:40 AM   #5
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Quote:
Originally Posted by blackhawkk22 View Post
I posted on Windy City BMW FB page as well and had a few people say it was Rear Trailing Arm Bushings (RTAB). Those are pretty cheap and shouldn't be too big of a deal to change those.
RTABs are an E46 issue. I don't think the e90s have that issue.
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      04-15-2017, 09:11 AM   #6
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Originally Posted by blackhawkk22 View Post
I posted on Windy City BMW FB page as well and had a few people say it was Rear Trailing Arm Bushings (RTAB). Those are pretty cheap and shouldn't be too big of a deal to change those.
I'm not on FB but can refer you to few shops depending on the area you live in. It would be good idea to get it up on a lift and inspect.
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      04-15-2017, 08:31 PM   #7
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Quote:
Originally Posted by blackhawkk22 View Post
Hey guys Ė lately Iíve been noticing that my car feels more unsettled than usual in Chicago roads. It feels less compliant and not as comfortable on uneven roads. The best way I can explain it when Iím taking an on/off ramp and the car goes over an expansion join/small bump the rear of the car feels like it skips ever so slightly; just enough to make it slightly uncomfortable. Same time last year it wasnít as pronounced, same tires, same wheels no changes to the car.

Before I go ahead and change my shocks, I figured I'd ask here to see what it could be.

Car: 2010 E90 335i RWD with M-sport Package (on stock sport suspension and suspension components)
Miles: ~80k
Aligned in 2016 and the car still tracks perfectly straight.
Those shocks are done.
My factory rears were done 1t 60K and the fronts not long after that.
I switched to Bilstein B8.
Same ride height and I couldn't be happier.
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      04-16-2017, 02:29 PM   #8
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Quote:
Originally Posted by techwhiz View Post
Those shocks are done.
My factory rears were done 1t 60K and the fronts not long after that.
I switched to Bilstein B8.
Same ride height and I couldn't be happier.
Would the lateral play come from a blown suspension too?
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      04-16-2017, 02:38 PM   #9
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Originally Posted by feuer View Post
I'm not on FB but can refer you to few shops depending on the area you live in. It would be good idea to get it up on a lift and inspect.
That would be great. Although I'm pretty mechanically included and do all my work myself
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      04-17-2017, 08:48 AM   #10
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Quote:
Originally Posted by blackhawkk22 View Post
Hey guys Ė lately Iíve been noticing that my car feels more unsettled than usual in Chicago roads. It feels less compliant and not as comfortable on uneven roads. The best way I can explain it when Iím taking an on/off ramp and the car goes over an expansion join/small bump the rear of the car feels like it skips ever so slightly; just enough to make it slightly uncomfortable. Same time last year it wasnít as pronounced, same tires, same wheels no changes to the car.

Before I go ahead and change my shocks, I figured I'd ask here to see what it could be.

Car: 2010 E90 335i RWD with M-sport Package (on stock sport suspension and suspension components)
Miles: ~80k
Aligned in 2016 and the car still tracks perfectly straight.
I refreshed my suspension last year and the change was night/day. I'd bet shocks and all new mounting hardware/rubber mounts would help tremendously.
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      04-17-2017, 10:40 AM   #11
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Check out what my strut mounts and bump stops looked like at 112k miles.

http://www.e90post.com/forums/showpo...74&postcount=5
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      04-17-2017, 10:50 AM   #12
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Check out what my strut mounts and bump stops looked like at 112k miles.

http://www.e90post.com/forums/showpo...74&postcount=5

Whoa! That's incredible! Perfect timing too as I've been spending the past 30 minutes putting parts together for my order.
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      04-17-2017, 05:00 PM   #13
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Quote:
Originally Posted by blackhawkk22 View Post
Whoa! That's incredible! Perfect timing too as I've been spending the past 30 minutes putting parts together for my order.
I think there are two more pieces you need on the front end.. There's a rubber spring pad and a paper like gasket at the strut mount. These were totally cheap if I recall correctly. Send a note to the guys at FCP; they know their stuff.

Also, you might want to consider sway bar end links too. They're common wear items and inexpensive. In my case, I had already replace the front thrust arm (i.e., the one with the crappy hydro bearing). And, I did the other front control arm for completeness in the front.

Find a good place for alignment and enjoy the ride! Also, watch out for the damned potholes in our area; they do wonders for our wheels, tires and suspension.
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