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  #1  
Old 09-03-2019, 09:47 AM
Ostremike Ostremike is offline
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Brake System Flush

I have a 2015 328i xdrive.
a local service (not BMW dealer) tells me I am due for a complete brake system flush including
MASTER CYLINDER, ANTILOCK BRAKE HYDRAULIC SYSTEM, BRAKE LINES, HOSES AND CALIPERS

I don't see anything in my owners manual as to scheduled service nor am I getting a dashboard warning

could this guy be right or is he pulling a fast one on me?
thanks BMW Community
Mike
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  #2  
Old 09-03-2019, 09:52 AM
John in VA John in VA is offline
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BMW maintenance calls for a flush every 2 or 3 years. Should find it in the iDrive directory.
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  #3  
Old 09-03-2019, 11:00 AM
namelessman namelessman is offline
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My 2013 iDrive says brake fluid service every 2 years. Forum wisdom says 2% or more water in brake fluid is no good, so one option is to test for water content and decide. My local dealers at times have brake fluid specials for $150 which is not bad.
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Old 09-03-2019, 11:52 AM
edycol edycol is offline
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Every two years REGARDLESS of mileage!


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  #5  
Old 09-03-2019, 01:13 PM
jlevin jlevin is offline
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Would a brake flush be covered under new car maintenance?
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  #6  
Old 09-03-2019, 01:26 PM
namelessman namelessman is offline
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Quote:
Originally Posted by jlevin View Post
Would a brake flush be covered under new car maintenance?
Yes.
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  #7  
Old 09-05-2019, 06:39 AM
jlevin jlevin is offline
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Where do I find Brake Fluid flush under time-based maintenance? I looked at manual and service warranty docs and not seeing this listed. I am getting my BMW serviced next week, and service personnel agrees that brake fluid is changed every 2-3 years. So I am getting this service performed. Are there any other fluids that should I look at for a 2016 328xi 40K miles? Thank you.
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  #8  
Old 09-05-2019, 06:42 AM
Autoputzer Autoputzer is offline
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Quote:
Originally Posted by edycol View Post
Every two years REGARDLESS of mileage!


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BMW pulled a fast one a few years ago when they still provided four years of free maintenance in the U.S. They extended the first brake fluid change to three years. This meant they only had to do one for free.
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  #9  
Old 09-05-2019, 09:37 AM
edycol edycol is offline
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Quote:
Originally Posted by Autoputzer View Post
BMW pulled a fast one a few years ago when they still provided four years of free maintenance in the U.S. They extended the first brake fluid change to three years. This meant they only had to do one for free.


No, all European cars have first flush after three years. They think that filling in controlled environment delays moisture levels creeping above 2%.
VW does it, MB does it. In Europe that is schedule from long time ago. Now, in some areas first flush could be after two years.


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  #10  
Old 09-05-2019, 10:50 AM
Autoputzer Autoputzer is offline
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Quote:
Originally Posted by edycol View Post
No, all European cars have first flush after three years. They think that filling in controlled environment delays moisture levels creeping above 2%.
VW does it, MB does it. In Europe that is schedule from long time ago. Now, in some areas first flush could be after two years.


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My 2002 M3 had all the brake fluid changes after two years. My 2014 535i had the first brake fluid change after three years, and then every two. The same for Frau Putzer's 2018 X3.

Not having to pay for that second brake fluid change under four-year free maintenance saved BMW literally tens of millions of Euros. I'm sure that was in the back (front) of their minds.

Last edited by Autoputzer; 09-05-2019 at 11:26 AM.
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  #11  
Old 09-05-2019, 11:55 AM
Rebound Rebound is online now
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Brake System Flush

Quote:
Originally Posted by Autoputzer View Post
BMW pulled a fast one a few years ago when they still provided four years of free maintenance in the U.S. They extended the first brake fluid change to three years. This meant they only had to do one for free.
Itís up to consumers to decide: Carmakers only need to engineer their cars to work through the warranty period. GM makes cars that frankly fall apart pretty quickly after that. Toyota, in my opinion, is the best at making cars which will keep running without repair long after the warranty expires.

BMW is sadly closer to GM in the longevity aspect. I own one, and I love it, but it definitely doesnít have the quality of my Toyota Prius.

I flushed the brake fluid last month. One thing Iíll say... the 435 is a pretty easy car to work on.

Last edited by Rebound; 09-05-2019 at 12:25 PM.
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  #12  
Old 09-05-2019, 11:55 AM
namelessman namelessman is offline
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Quote:
Originally Posted by Autoputzer View Post
My 2002 M3 had all the brake fluid changes after two years. My 2014 535i had the first brake fluid change after three years, and then every two. The same for Frau Putzer's 2018 X3.

Not having to pay for that second brake fluid change under four-year free maintenance saved BMW literally tens of millions of Euros. I'm sure that was in the back (front) of their minds.
One possible way to explain 3-year first brake fluid change is that the factory fill is 100% clean, while any subsequent brake service may still have residual fluid somewhere, so the mixed result is not as clean as from factory.
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  #13  
Old 09-05-2019, 12:04 PM
Autoputzer Autoputzer is offline
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Quote:
Originally Posted by namelessman View Post
One possible way to explain 3-year first brake fluid change is that the factory fill is 100% clean, while any subsequent brake service may still have residual fluid somewhere, so the mixed result is not as clean as from factory.
Yeah, and the fluid goes from a sealed delivery system to the car, in an air conditioned factory, and is closed up in the car in minutes. But, you can bet that Hans and Franz were also thinking about those millions of Euro's.

With the economies of scale with consumer products, a penny here and a dollar there can add up to millions real fast.

A friend of mine designed TV's in the 1970's. He said they'd fret for days about how to eliminate one resistor on a board. He later went on to manage a weapon system designed specifically for WWIII that cost about $2B. He said that there was no optimization of the design. Once they got it to work, it went into production. The thing was full of resistors that required 0.5% or 0.25% tolerances.
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  #14  
Old 09-05-2019, 12:07 PM
Autoputzer Autoputzer is offline
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Quote:
Originally Posted by Rebound View Post
Itís up to consumers to decide: Carmakers only need to engineer their cars to work through the warranty period. GM makes cars that frankly fall apart pretty quickly after that. Toyota, in my opinion, is the best at making cars which will keep running without repair long after the warranty expires.

BMW is sadly closer to GM in the longevity aspect. I own one, and I love it, but it definitely doesnít have the quality of my Toyota Prius.
Yeah, tell me about it. I'm currently nursing a 12.5 year old, 123k mile Chevy Cobalt SS. But, I get big discounts on GM stuff. Shortly after I bought the Cobalt, it became apparent that GM was going to be bankrupt soon. The first clue was the owner's manual being printed on pulp paper, only a slightly better grade than what's used in comic books.

GM's running out of trim parts for Cobalt's, and what they have left is usually on sale. There's not much demand now, because most of the current Cobalt owners are more interested in getting more meth' or crack than in replacing a broken passenger side sun visor or leather seat cover.

Maybe BMW will get some good ideas from the Z4/Supra joint project.
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Last edited by Autoputzer; 09-05-2019 at 12:12 PM.
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  #15  
Old 09-05-2019, 12:54 PM
namelessman namelessman is offline
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Quote:
Originally Posted by Autoputzer View Post
Yeah, and the fluid goes from a sealed delivery system to the car, in an air conditioned factory, and is closed up in the car in minutes. But, you can bet that Hans and Franz were also thinking about those millions of Euro's.

With the economies of scale with consumer products, a penny here and a dollar there can add up to millions real fast.
A $150 brake fluid special probably means half-hour labor plus $15-$20 DOT brake fluid at retail, or maybe $100 of shop charge billable to BMWNA, so it does add up with, say, 350k new bimmers in US needing one extra free job every 2 years.

BTW just by cutting free maintenance to 3 years/36000 miles already takes care of extra brake fluid service without changing from 2 to 3-year for first service.
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  #16  
Old 09-05-2019, 10:04 PM
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Dave 20T Dave 20T is offline
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BMW used to specify brake fluid changes every year. Then it became 2 year. Now it's 3 years. GM is 4 years. German brake fluid brand ATE recommends 3 years.

I think it's a matter of priorities. Changing it every year is good but there's probably not much difference with 2 years. Probably could go to 3 years.
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  #17  
Old 09-06-2019, 05:46 AM
jlevin jlevin is offline
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Where do I find the BMW fluid maintenance schedule? I looked at manual and service warranty docs and not finding brake fluid listed.
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  #18  
Old 09-06-2019, 06:15 AM
jaye944 jaye944 is offline
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1'er here.
I've had mine done twice, in about 4 years

It comes up in the iDrive for me
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  #19  
Old 09-06-2019, 06:39 AM
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Doug Huffman Doug Huffman is offline
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All that you need to know about BRAKE FLUID DOT 3, 4, 5, 5.1.

Boiling point dry and wet moisture fraction. Forward and backwards mixing compatibility. compositions. Anti-corrosion packages. Viscosity ranges with temperature.

https://www.epicbleedsolutions.com/b...s-mineral-oil/

I run Magura Bigs (assymetrical Julies) hydraulic disc brakes on both HPV tricycles.

I note with great amusement that DOT 5 silicone brake fluid is PolyDiMethylSiloxane!
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Old 09-06-2019, 08:59 AM
namelessman namelessman is offline
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Quote:
Originally Posted by jlevin View Post
Where do I find the BMW fluid maintenance schedule? I looked at manual and service warranty docs and not finding brake fluid listed.
My 2013 warranty booklet(available online) says 2 years.

https://www.bmwusa.com/explore/bmw-v...nty-books.html
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