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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 02-02-2013, 08:34 AM
hondo402000 hondo402000 is offline
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Location: Charlotte, NC
 
Join Date: Nov 2012
Posts: 1,640
Mein Auto: 2007-335 HTC
Brake booster Vacuum Check valve and grommet replacement on 335i

There was a thread about a hard brake peddle upon car sitting over night, So the tread said the check valves were known to leak and or the grommet was leaking, well I purchased the check valve, about 30 bucks and the grommet(BMW calls it a gasket) for like 3 bucks. I just finished replacing them on my 2007 335i, it was a pain, ended up taking the cabin filter out and the cover under the cabin filter, and I un bolted the ABS module, I didnt disconnet any break lines but it did give me more room to pry the old check valve out, the Grommet was easy to get out, a little more difficult to install, but I did manage to get it back together. Now I will see if by sitting overnight the vacuum holds in the booster and the peddle is easier to push down, I did check the old unit by sucking on the valve and it was leaking so that was the problem, . so hopefully that will take care of the hard peddle issue

minor tools needed to do the repair but a set of locking hemostats came in handy griping the grommet while lining it up and working it back in with a screwdriver.

Hondo
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  #2  
Old 02-02-2013, 10:56 AM
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fun2drive fun2drive is offline
BMWCCA 149159
Location: Panhandle of Florida
 
Join Date: Nov 2005
Posts: 2,609
Mein Auto: 335 vert//M3/4/ 13Outback
Mine leaks but it isn't much of any issue since it only happens if my car sits a long time. I will get around to doing this. Interesting that it leaked when I let the car sit but take to the dealer under warranty is would not leak since they didn't let it sit for maybe 5 days.
Good to know it is no big deal to replace...
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  #3  
Old 02-02-2013, 01:08 PM
hondo402000 hondo402000 is offline
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Location: Charlotte, NC
 
Join Date: Nov 2012
Posts: 1,640
Mein Auto: 2007-335 HTC
well, not a big deal, just a little difficult to get to, could be a lot of curse words involved, and getting the nuts off of the ABS system without dropping them under the brake booster is a challenge. if you have patience you can do it, Definitely not a big deal if the BMW palace does it. Now thinking like a woman, No offense, but I just save 300 bucks now I can go get that new Sig 9mm gun I want

Yea, I need to do more repairs so I can save money and spend it on something else


Hondo
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  #4  
Old 02-03-2013, 06:48 AM
hondo402000 hondo402000 is offline
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Location: Charlotte, NC
 
Join Date: Nov 2012
Posts: 1,640
Mein Auto: 2007-335 HTC
checked the brake peddle this morning, Great, still had an easy peddle, so the fix worked

Hondo
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  #5  
Old 02-09-2013, 08:29 AM
hondo402000 hondo402000 is offline
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Location: Charlotte, NC
 
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Posts: 1,640
Mein Auto: 2007-335 HTC
well my car sat for a week and still had a vacuum for a soft peddle feel at start, issue solved

Hondo
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