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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 08-06-2011, 06:40 AM
dalejewell dalejewell is offline
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Brake fluid change at BMW dealer

Had my car into the BMW dealer for oil change: They told me my car needs brake fluid change at NO charge, ok dhange the fluid:

They said they did change the brake fluid:

My question is: Does the dealer flush the brake fluid or just change the fluid at the master cylinder?

I could find no signs that the fluid was changed at the calipers or at the master cylinder.

Does anyone know how the dealer changes the brake fluid?
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  #2  
Old 08-06-2011, 06:47 AM
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Saintor Saintor is offline
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I don't know the answer, but it appears to me that the reason why this oil needs service so often (every 2years) might be because there is only a portion of it that is changed. It is often referred as a brake oil flush instead brake oil replacement.
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Last edited by Saintor; 08-06-2011 at 07:06 AM.
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Old 08-06-2011, 07:05 AM
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thekurgan thekurgan is offline
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Per the TIS, they will bleed in standard fashion, starting with the farthest caliper from the master cylinder, then the ones closest. Most dealers use pressure bleeders attached to the master cylinder now, but some still use the two-man method.
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  #4  
Old 08-06-2011, 12:21 PM
anE934fun anE934fun is offline
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Quote:
Originally Posted by thekurgan View Post
Per the TIS, they will bleed in standard fashion, starting with the farthest caliper from the master cylinder, then the ones closest. Most dealers use pressure bleeders attached to the master cylinder now, but some still use the two-man method.
With labor rates being what they are? Not in the S.F. Bay Area. I wonder if the techs in the Bay Area even know how to do the 2-man bleed procedure.
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Old 08-06-2011, 12:39 PM
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thekurgan thekurgan is offline
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Originally Posted by anE934fun View Post
With labor rates being what they are? Not in the S.F. Bay Area. I wonder if the techs in the Bay Area even know how to do the 2-man bleed procedure.
Yeah, I hear you there, but if you really want a good pedal feel, the two-man effort is worth it, and a rubber mallet on the brake caliper doesn't hurt either while bleeding
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  #6  
Old 08-06-2011, 12:59 PM
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bmw_n00b13 bmw_n00b13 is offline
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Quote:
Originally Posted by thekurgan View Post
Per the TIS, they will bleed in standard fashion, starting with the farthest caliper from the master cylinder, then the ones closest. Most dealers use pressure bleeders attached to the master cylinder now, but some still use the two-man method.
A proper bleed REQUIRES a pressure bleeder; it is not possible to bleed the ABS/DSC module without one (and the BMW computer of course).
I have done the two-man with my car; works fine, but there is definitely no abs bleeding possible without the pressure on the master cylinder, even with a BMW computer cycling the ABS.

The pressure bleeder model still requires the pedal to be pushed a few times.
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  #7  
Old 08-06-2011, 01:04 PM
Easy Rhino Easy Rhino is offline
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No need to have a two-person bleed - that's the old school manual method.

All decent shops use vacuum or pressure bleeders, which is a one-man operation.

They will flush out all of the brake fluid if done correctly, starting with emptying and refilling the master cylinder reservior with fresh fluid then purging through the individual lines to the slave cylinders at each wheel, until the fluid runs clear, using s presurized fitting at the reservior cap, or using the vacuum system (not as easy).

This is a maintenance item you don't want to ignore.
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  #8  
Old 08-06-2011, 01:31 PM
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thekurgan thekurgan is offline
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Quote:
Originally Posted by bmw_n00b13 View Post
A proper bleed REQUIRES a pressure bleeder; it is not possible to bleed the ABS/DSC module without one (and the BMW computer of course).
I have done the two-man with my car; works fine, but there is definitely no abs bleeding possible without the pressure on the master cylinder, even with a BMW computer cycling the ABS.

The pressure bleeder model still requires the pedal to be pushed a few times.
Yes, ABS is a PITA for the DIY'r.

I've been using Mike's DIY guides for years now.

http://www.madrussian.net/m3/diy_brake_bleed.shtml
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Last edited by thekurgan; 08-06-2011 at 01:32 PM.
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  #9  
Old 08-06-2011, 06:34 PM
Lufthansa Lufthansa is offline
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Just out of curiosity, because I also have a '10 328 Coupe - why did they change the brake fluid so soon? My understanding is it's done every 2 years.
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Old 08-07-2011, 07:16 AM
bballfreak bballfreak is offline
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It is hard to really know that it has been done?
unless one checks the color of the brake fluid coming out of the
caliper. It is quite easy to fool folks by just sucking out the
old darker fluid out of the reservoir and filling it
with new fluid.
BTW, does 2009 335d use DOT4 or DOT5?
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  #11  
Old 08-08-2011, 08:25 AM
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need4speed need4speed is offline
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One thing to remember about the 2 year brake flush, the two years starts to run from the date of manufacture, not the inservice date like the "free" oil changes do. As such you should be able to get 2 free brake fluid flushes under the 4 year "free" service plan. N4S
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