How to check the brake fluid level on Bmw Serie 3 E92 ?

check out motive power bleeders. Their euro kit comes with a cap that fits the BMW reservoir, and makes it easy to pressure bleed your brake system

Dude, it sounds like to me you have no F-ing clue what the hell you are doing. Every car built in the last 70 years has the brake reservoir on top of the master cylinder, which on the other side of the fire wall from where the brake pedal is. It shouldn’t be a question of whether it’s on the left side of the engine compartment or the right side, if you can’t even figure that out or know what kind fluid it takes maybe it’s a safety issue for you. It takes DOT 4 fluid BTW. Hope that helps. Try not to kill anyone.

And if one were to look closely at the powersteering reservoir one would see hoses going down to the steering rack, not to the brake system, which should be the first clue that the powersteering reservoir is not connected to the brake system, and not to point out the fact that the green label on the powersteering reservoir doesn’t say «Brake Fluid Only» on it like every brake fluid reservoir cap does, regardless of what brand of car it is. So using the excuse «this is my first BMW. » is bullshit.

01-26-2011, 06:03 AM #12

01-26-2011, 08:52 AM #13
Chriztofor
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^^^ In ENINTY’s defense, I’ve never seen a brake fluid reservoir on the passenger side either. But you’re right, war isn’t the answer, we’re all on the same team. OP, I got this device:

And now I’m looking for an adapter to fit my Jeep.

At this time, Motive Products price is better.

01-26-2011, 09:25 AM #14

^^^ In ENINTY’s defense, I’ve never seen a brake fluid reservoir on the passenger side either. But you’re right, war isn’t the answer, we’re all on the same team. OP, I got this device:

And now I’m looking for an adapter to fit my Jeep.

At this time, Motive Products price is better.

Listen, I wasn’t trying to flame the OP. I was trying to teach him to think for himself; to apply logic to the situation. All machines are based on logic. Which is why I used the powersteering reservoir as an example in my second response. We had another Poster earlier this week on the maintenance blog, finally figure out he put brake fluid in the powersteering reservoir, thinking the PS reservoir was the brake fluid reservoir. If you take the time to look at the components that make up a car, they all have a purpose, and logically flow together. The PS fluid reservoir is connected to the powersteering pump and steering rack, not to the brake system. (i.e. the airfilter is not connected to the exhaust manifold; it is connected to the intake manifold — logic. )

It is a US DOT regulation that the brake system reservoir be labeled «Brake Fluid Only». All cars have this marking; it is required by law. The law is there to help prevent a person from putting the wrong fluid in the brake system and cause a failure; possibly killing someone. So if the OP has added brake fluid to one of his other cars in the past, then even with his unfamiliarity with his new BMW, he should have looked for a similar label on the component he was considering to be the brake fluid reservoir. The PS reservoir has no such marking, so the process of elimination would indicate that the PS reservoir is not the correct under-hood component to put brake fluid into.

I get it, not everyone is mechanically inclined, and the E90 has a stupid cover over the brake fluid reservoir making it not easy to find. But if one is slightly familiar with cars and brake systems, it would be a very good and logical guess the brake system mastercylinder is on the firewall, under the hood, in front of the driver’s seating position, like it is on every other car and it would be labeled «Brake Fluid Only» like every other car is.

At some point in his life the OP will be in a situation where he can’t get the internet and ask for someone to show him a picture. I was just trying to help the man out. Give a man a fish, he’ll starve; teach a man to fish and he’ll eat forever.

01-26-2011, 10:07 AM #15