flashing brake failure light revisited - BMW Luxury Touring Community
 
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post #1 of 5 Old Nov 5th, 2005, 5:57 pm Thread Starter
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flashing brake failure light revisited

Well, it has been a month or so since I last posted. I have finally had a chance to check out my rear master cylinder fluid resrvoir. It was not as hard to remove stuff to get to it as I had originally feared. It turns out that the fluid level was at the low mark. I added some Valvoline "Exceeds Dot 3 and Dot 4 specifications." brake fluid. I used a 10 cc syringe (my wife is a doctor so it was easy to come by) and added 10 cc of said fluid. Low and behold, the brake failure light stopped flashing, and I once again hear those R2D2 sounds from the servo gizmo. All is right once again.

(Amazing how much more verve one rides with when the brake failure light isn't flashing!)

Hope this helps others to check it out themselves. Not as daunting a task as it might seem.
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post #2 of 5 Old Oct 30th, 2008, 9:12 pm
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Re: flashing brake failure light revisited

I recently purchased an '02 k12. When I got it home, the lights were flashing indicating low fluid. I replaced the rear pads because the dealer said that was the probable cause of the low fluid, but it sounds like I might be wise to top off the fluid too since the pads weren't really worn down all that much. It must have been low fluid level itself rather than worn pads.
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post #3 of 5 Old Oct 30th, 2008, 9:22 pm
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Re: flashing brake failure light revisited

As the pads wear, the fluid in the wheel reservoirs will go down some. If your brake fluid level is marginal, then this could lead to the lights flashing. The LT prefers to have its brake reservoirs filled all the way to the Max mark (not just somewhere above the Min mark). This is particularly true for the '02-'04 LTs with the Integral (power) ABS brake system.

Fortunately, it's a known issue with an easy fix.

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post #4 of 5 Old Oct 30th, 2008, 9:24 pm
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Re: flashing brake failure light revisited

Welcome to the asylum, um, er forum, Brian. I think your thoughts of topping off the rear reservior are correct. You might even want to have a look at the front. If the fluid looks like iced tea, you will definitely need to change it. Not having an LT with the linked brakes, I'm not aware of all the processes a fluid flush entails. A search for "linked brake fluid flush" should net some results. There may be instructions in the Hall of Wisdom. Either way, I imagine someone with knowledge will post here shortly.

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post #5 of 5 Old Oct 30th, 2008, 10:08 pm
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Re: flashing brake failure light revisited

Thanks, Ken and Lee. Topping off that fluid is on my 'to do' list this weekend. I appreciate your feedback!
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