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Need advise for rear shocks - fronts replaced by dealer
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05-19-2017, 08:06 PM | #1 |
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Need advise for rear shocks - fronts replaced by dealer
I did some reading/searching on the forums but couldn't get a clear answer and could use some help from the experienced folks here.
2011 328i - non-sport suspension, 54k miles. Dealer replaced front struts under warranty with stock OEM since they said they were shot when inspected. It is my DD with mostly city driving - quite mild for the most part. I am planning to do the rear ones myself and would like advise on what I should put on there to match up with the new stock front struts. The rear now looks a bit low since the fronts were replaced, so I am guessing they are shot as well. 1. Stock BMW or Bilstein B4 OEM shocks 2. Bilstein B6 or HD shocks 3. Or others? I don't want to replace the rears with something that will mess up the ride with the stock front struts, but am willing to put something other than stock if it will help with longevity or ride quality or handling. Also, should I replace any other parts (like solid rubber Monroe bushings) or lower mounts? I am in northern CA and the car hasn't seen much of extreme weather or poor road conditions. Thanks! |
05-21-2017, 09:19 AM | #3 |
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As long as your replacing the shocks go ahead and replace the rubber mounts too. Both upper and lower. At 82K ours especially the top rear shock mount was bad.
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05-21-2017, 10:58 AM | #4 |
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If you have OEM on the front, I'd go with Bilstein B4's on the rear. Better shock than OEM.
I'd never go above and beyond the B4 for a 328. If you have a 335 than, that's a different animal and thus requires more advanced parts. If the car just had 54k on it, just replace the shocks. Don't worry about surrounding parts till the car has 100k |
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05-21-2017, 11:05 AM | #5 |
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Smear some oil around rear shocks, take it back to dealer & tell them you've been told your rear shocks may need replacing & let the dealer do the rears under your warranty
I did this on my old e39 540i & had all four shocks replaced for free
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E92 335i. E36 328is coupe E39 540i V8 6SP manual E34 3.6 M5. E34 525i sport. VW Jetta Mk2 GTI 16v. 1679cc 1967 resto-cal beetle |
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05-21-2017, 02:38 PM | #6 |
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Thanks all. Will stick to stock oem for rears.
I'll try to get the rears replaced under warranty as well. Dealer experience wasn't the best with the fronts. They wanted me to pay so had to show them fine print coverage under BMW platinum warranty. Broke my front brake sensor and did not install the clip that holds it. Took 5 days total waiting for parts and weekend in between. No loaner either- they were all out Or just do it myself with b4/Sachs stock shocks. Seems like a pretty straightforward install. I'll also replace the mounts if there are signs of wear. |
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05-22-2017, 04:25 AM | #7 |
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hahah good one! Haven't heard than one in a while lol
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05-22-2017, 09:46 AM | #8 |
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05-22-2017, 11:36 PM | #9 | |
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05-23-2017, 01:39 PM | #10 |
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Ok looking at B4 rear shocks I keep getting TWO different part numbers from various websites - bavauto, fcpeuro, summit and bilstein(US):
19-135021 OR 19-136592 I could not find the detailed specs on either shock. Which is the correct one? 2011 328i e90 sedan build date: 04/2010 Thanks! |
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05-23-2017, 04:17 PM | #11 | ||
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05-23-2017, 11:49 PM | #12 |
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Garage List E86 Z4 M [10.00]
F15 X5 xDrive35i [9.17] F10 550i (Retired) [9.17] E85 Z4 M (Retired) [9.41] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.56] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [8.93] |
Interesting...
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05-24-2017, 12:40 AM | #13 |
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05-24-2017, 09:46 PM | #14 | |
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I am not sure where you are going with this. My original point was that putting a b12 kit on a 328, for example, would be a waste money & time. |
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05-24-2017, 11:48 PM | #15 | |
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Garage List E86 Z4 M [10.00]
F15 X5 xDrive35i [9.17] F10 550i (Retired) [9.17] E85 Z4 M (Retired) [9.41] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.56] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [8.93] |
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/thread |
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05-28-2017, 05:31 PM | #16 | |
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05-28-2017, 06:02 PM | #17 | ||
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That's why a B4 sport is a better option for a car that has 230 hp and can't break 6 seconds 0 to 60 from the factory. |
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05-28-2017, 06:45 PM | #18 | |
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Or, are you saying that it's the owners of the cars that physically cannot push the car? Is a 0-60 of six seconds a universal factor for determining how much suspension a car can use? What about the 255hp 330i - how much more would you say it could use of its suspension? Enough to qualify for an acceleration demanding, but rather generic Bilstein B6? Maybe even the B8? These new theories you bring to the table really deserve an explanation. EDIT: Wait, I think i might get it now. Upon putting the skinny pedal to the floor in a 335i, those owners will experience something in less than 6 seconds that will really put the suspension under extreme duress? That movement of the weight moving to the rear compresses the suspension down so much that a B6 or B8 suspension will truly be appropriate. |
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05-28-2017, 06:47 PM | #19 | ||
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Drives: 2007 Black/Black 335i e90
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05-28-2017, 07:24 PM | #20 | |
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Garage List E86 Z4 M [10.00]
F15 X5 xDrive35i [9.17] F10 550i (Retired) [9.17] E85 Z4 M (Retired) [9.41] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.56] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [8.93] |
Quote:
F = MA (acceleration for the non-experts here) 335i "a" is about a factor of 7 units 328i "a" is about a factor of 2.5 units M is about the same for both... hence 335i requires suspension that can handle more force if you will, e.g. the bilstein B6/8. 328i can get away with less sporty hardware. Those values are rounded so don't hold my math against me... Agreed Btw what suspension do you have? How do you like it and how's it handle when you push your car to limits? Always looking for ways to improve my times... |
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328i suspension, rear shocks, suspension kit |
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