Important update according to bmw do i do it?

DTRJ · 10-18-2019, 10:30 PM

Quote:

Originally Posted by sinbad4

Brake fluid flush? Nah.. A paranoid person might do at 50k. Most people never do. I generally do when I change my brake pads.. since I'm there anyway.

Their is no charge for brake fluid flush within 3 years or 36k miles under the free maintenance plan. I always,have them due the fluid change at just under the 3 years when they do the final free oil/filter change. They will also change the cabin filter if you request it at no cost to you

BobsM3Coupe · 10-19-2019, 08:38 PM

Quote:

Originally Posted by DTRJ

Their is no charge for brake fluid flush within 3 years or 36k miles under the free maintenance plan. I always,have them due the fluid change at just under the 3 years when they do the final free oil/filter change. They will also change the cabin filter if you request it at no cost to you

My dealer changed the cabin air filter at the first 1 year service. I never mentioned it. I think they just did it to bill BMW for the more costly filter and labor. Crazy since my car only had about 4,000 miles on it. I mentioned that the engine air filter would be more important to do instead of the cabin filter, but they said that isn't allowed till the 3rd service.
I think they make this stuff up.

SteveX3M40i · 10-20-2019, 02:57 AM

Hi,
The reason that brake fluid needs changing occasionally is that it is hygroscopic - so absorbs water.
This water then can boil off when the fluid gets hot in the calipers after heavy braking.
However - it sits in a sealed system - so little chance for fresh, water laden, air to mix with it to allow that water to be absorbed!
Nice little earner for dealers!
Cheers
Steve

chpnsus · 10-20-2019, 07:26 PM

Brake fluid absorbs water which reduces the boiling point. Also, that water makes its way towards the caliper. Yes, you won't notice anything but years later that caliper can seize. That being said I flush mine on my own every four years. I also use ISTA to open up the abs valves to get it all out.

"Glycol-ether (DOT 3, 4, and 5.1) brake fluids are hygroscopic (water absorbing), which means they absorb moisture from the atmosphere under normal humidity levels."

10-20-2019, 02:57 AM	#25
SteveX3M40i First Lieutenant 541 Rep 382 Posts Drives: BMW iX40MSport Join Date: Jan 2019 Location: Sunny Abu Dhabi iTrader: (0)	Hi, The reason that brake fluid needs changing occasionally is that it is hygroscopic - so absorbs water. This water then can boil off when the fluid gets hot in the calipers after heavy braking. However - it sits in a sealed system - so little chance for fresh, water laden, air to mix with it to allow that water to be absorbed! Nice little earner for dealers! Cheers Steve __________________ Checkout my Instagram @carsandheels 2019 X3M40i - gone! 2023 iX40MSport
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10-20-2019, 07:26 PM	#26
chpnsus Private 29 Rep 56 Posts Drives: 2020 x3 m40 Join Date: Sep 2019 Location: washington, DC (USA) iTrader: (0)	Brake fluid absorbs water which reduces the boiling point. Also, that water makes its way towards the caliper. Yes, you won't notice anything but years later that caliper can seize. That being said I flush mine on my own every four years. I also use ISTA to open up the abs valves to get it all out. "Glycol-ether (DOT 3, 4, and 5.1) brake fluids are hygroscopic (water absorbing), which means they absorb moisture from the atmosphere under normal humidity levels."
	Appreciate 0 Quote