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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Very bumpy ride on e92 335i



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      04-02-2010, 12:59 PM   #1
spera23
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Very bumpy ride on e92 335i

I recently purchased a used 2007 335i coupe (sport). Everything is going good, except I notice the car has a very bumpy ride on pretty normal roads. It feels like when you drive, you can feel every little bump and pothole. The care is lowered quite a bit (not sure what kind of shocks/springs may of been used).

Is there anyway to improve the bumpy/jerky ride? Would raising the car back up to stock improve it? I tried lowering the tire pressures as they were way over inflated but that only helped slightly. Any other ideas??

Thanks!
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      04-02-2010, 01:47 PM   #2
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First let us know what you have in there. It's possible to improve the ride with your existing setup but we need to know what it is. This includes shocks, springs, swaybars, camber plates. You may only have 1 or 2 of these but you could have all 3. Make sure we know the brand and model of each component.

If the existing setup won't allow a better ride then it's on to a new suspension setup.
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      04-02-2010, 09:59 PM   #3
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dont forget about the tires... run-flats notoriously give jarring rides, especially the older generations..
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      04-03-2010, 10:17 AM   #4
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I heard about the about the run flats making a bit harder of a ride, but Im not using the stock runflat tires.

Sorry for being a bit of a amateur at this, but is this anyway to find out what kinda shocks, springs, swaybars etc may or may not be in there without taking it to a shop and having them hoist it up?

Also, generally does lowering the e92 make for a rougher ride? Or is it that the smoothness of a the ride can possible be improved, depending what kind of parts were used when lowering?
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      04-05-2010, 09:13 AM   #5
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u can look into the wheel wells to see what sort of springs and shocks are installed if car is clean i guess, same for sways, if they are aftermarket you can see them as they usually made from different colour to oem (black). Same goes for shocks and springs come to think of it. Sounds like you just have some HR springs...
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      04-05-2010, 06:02 PM   #6
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Okay so I took a look into my wheel well but I have no clue what I am looking for. Sorry if I sound completely stupid, but ya, I know what spings and shocks look like generally but no clue where I can even find them.

Im hoping you guys can help me out with what I have on the car right now.

Here are some pics of the inside and out....
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      04-05-2010, 07:12 PM   #7
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Looks like (with help from our members) that the shocks are OEM and the springs are H&R Race (29183).

Anymore info you guys can contribute if thats whats causing the bumpy/jerky ride?
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      04-05-2010, 07:14 PM   #8
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as for the pic, i saw that you've OEM shocks, OEM sways, H&R sport springs. My guess is, the OEM shocks die becuz of the H7R sport springs, so your car is manily riding on the springs. Might want to replace the shocks
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      04-05-2010, 07:15 PM   #9
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Is it common that the stock shocks aren't able to handle the H&R springs?
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      04-05-2010, 07:20 PM   #10
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usually need to replace the shocks about a yr after you have the aftermarket springs install.
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      04-06-2010, 04:14 PM   #11
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Lean on the front of your car and push it down, then let it go. Does it keep on bouncing up and down or does it settle quickly?
The former would mean blown shocks.
I personally think it's just the "race" springs. Even with working shocks, OEM shock + stiffer spring is never a great combo.
I don't know what the exact rate on these is but it's probably quite a bit stiffer than stock. I'd ditch them and put stock springs back on.
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      04-06-2010, 06:35 PM   #12
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If I do ditch them, and go back to the stock springs (Sport) how much difference is it going to make in the height of the car? Will it be very noticeable in the front and rear??
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      04-06-2010, 07:57 PM   #13
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Why don't you take a look at any stock 335i around you?
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      04-06-2010, 07:59 PM   #14
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spera id pick up some aftermarket shocks if i were you. the car will handle and feel better
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      04-06-2010, 07:59 PM   #15
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Well thats what I've been doing. But the stock 335's ride a bit higher compared to the stock 335's with sport suspension do they not? Its hard for me (not being the most car knowledgeable) to know why 335's may or may not have the sport package.
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      04-06-2010, 10:22 PM   #16
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Flukey, which aftermarket shocks would you go with? Ive heard a lot of pro and cons about both the Koni yellows and the FSD's.
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      04-07-2010, 06:08 AM   #17
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If you want to keep the race springs then go with the yellows for sure...

If you want to bring it up just a bit, then go with the sports. I have the sports and FSD's and am very happy with my ride...but most recommend the yellows even with the sports and DEFINATELY with the race....
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      04-08-2010, 10:37 AM   #18
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Originally Posted by spera23 View Post
Well thats what I've been doing. But the stock 335's ride a bit higher compared to the stock 335's with sport suspension do they not? Its hard for me (not being the most car knowledgeable) to know why 335's may or may not have the sport package.
There is only a max of about 6-8 mm difference in ride height sport to non sport. Technically it is the same suspension but some will argue the sport is (secretly) stiffer. The height difference will be due to minimal car weight difference and the variable of settling. Either way the ride height will increase 1.4 in up front roughly and 1.2 in in back roughly. I'd say if you could drop a little $ for some koni yellows or something, that would b the best option. Not to mention, the dealership will bend ur wallet over and make it scream if u ask em to put it back to stock.
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