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What type of brake fluid?
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02-24-2009, 06:40 PM | #1 |
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What type of brake fluid?
Car is indicating low brake fluid. I could not find in the manual what grade of fluid i need for a possible top off. Also where is the reservoir? I have a/t transmission. |
02-24-2009, 09:12 PM | #2 |
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Any Dot 4 fluid will do... Well you're in Canada so I dunno if the DOT standards are even used there.
The brake fluid is behind the driver side strut tower, under the black cover as I recall.
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02-24-2009, 09:56 PM | #3 |
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You should never have to top off brake fluid. You either have a leak, or the pads are getting low. Although it's possible that the last person to do a brake flush didn't correct the level when they were done...
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02-24-2009, 10:48 PM | #4 | |
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Brake fluid level go down as your pads wear out... I am not saying a possibility of a leak does not exist.
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02-24-2009, 10:53 PM | #5 |
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02-24-2009, 11:37 PM | #7 |
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If your car is under warranty, bring that sucker in. They'll diagnose the problem for you. Why are you even asking us?
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02-24-2009, 11:43 PM | #8 |
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The reason being is that I bought my car in the US. I live in Canada and the free maintenance does not transfer over. Just warranty (something breaking, not wear and tear).
The closest US dealer is in Seattle, about 2 hours away. So if I have to get the brakes done, I have to drive to Seattle, if its something that's just basic warranty, I'll go local. |
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02-24-2009, 11:44 PM | #9 |
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that sucks lol
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02-25-2009, 12:04 AM | #10 |
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02-25-2009, 02:09 AM | #12 |
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What you see is this oily stuff in a can. In reality brake fluid is carefully formulated from Glycol (Polyalkylene Glycol Ether) or silicon based oils plus a selection of corrosion inhibitors, pH stabilizers and anti-oxidants. Brake fluid is carefully controlled for boiling point and has a 'wet' and 'dry' spec. (before and after absorbtion of atmospheric moisture).
Your brakes comprise a rather complex hydraulic system incorporating several high tolerance valves for the ABS so quality and compatibility of brake fluid are both important considerations. I would therefore not just top off with any old fluid but would buy a fluid recommended by BMW to ensure compatibility with the fluid that's already in the system. Your break fluid sensor will light up for one of 3 reasons.... 1. gradual loss (seepage) around 1 or more pipe joints or seals 2. pad wear (especially if the fluid wasn't topped off properly at the last service) 3. faulty sensor Break fluid level is a diagnostic signal for you to check things over Get the right fluid and top-off the reservoir to slightly below the max mark Have a quick look under the car with an inspection lamp for any signs of leakage If the warning is extinguished, and you find no signs of fluid loss then you're good to go |
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02-25-2009, 07:52 AM | #14 | |
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Does that mean I should flush out the cow milk I added last week?
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02-25-2009, 08:04 AM | #15 |
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[QUOTE=noro;4566192]Does that mean I should flush out the cow milk I added last week?
I hope is was full cream? Semi-skimmed has too high water content while half and half is likely to boil under heavy usage and the resultant cream cheese is a bitch to flush |
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02-25-2009, 12:01 PM | #16 | |
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I'll try to top if off with dot4 brake fluid, check for leaks etc. If the problem persists I'll head down to the stealership. The reason I posted front and rear brake status is that it seems it can not be pad wear ( I hope, unless the sensors are wrong). So it must be a leak? Do you need scheduled brake fluid changes? |
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02-25-2009, 01:53 PM | #18 |
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02-25-2009, 01:57 PM | #19 |
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Yes, a definite +1 for SocalTech. He's been awesome answering my questions.
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