Just got a service alert on the wife's Mercedes that indicates, among other things, a brake fluid flush. The car is 4 years old and just under 40k miles.
That led me to thinking, is this really necessary at 40K, and at what interval does Aston Martin recommend a brake fluid flush.
My Honda recommended a brake fluid flush at 100K if I remember correctly. I understand that moisture will eventually contaminate the fluid, but modern cars brake systems are pretty air tight. I can go along with flushing the brake system every 5 years and or 50K miles, but I am not convinced that this should be done every 2 years as recommended on the MB discussion list.

Any thoughts on this ?

 

Aston's service interval for brake fluid is every 2 years/20k miles.
I think for a normally-driven car, it's a bit excessive as well. But it's recommended for this frequency for safety, performance, and long-term reliability. A Honda doesn't see the kinds of use that an M-B or AM will see - these cars are made for high speeds (performance driving, autobahn cruising, etc), so the brake systems are designed to see much higher wear rates.

 

If you are using very high temp brake fluid they tend to be more hydroscopic (absorb water particles) and need more frequent changes so every two years for these should be observed. If the car isn't track driven and a high quality (but not extreme) brake fluid is used you can stretch this out a bit longer. Just my opinion.

 

I would do it every 2 years, regardless of the car, obviously more frequently if the car sees any track usage.

 

Porsche also recommend a brake fluid flush every 2 years for their cars.
CATTMAN

 

From what I've found is if it's a V12 model brake fluid should be changed every year or 10K. DB9/Vanquish/Rapide/12Vantage.

 

V8 Vantage is every 2 year, V12 Vantage/DB9/DBS/Vanquish is every year..Depending on the year of owners manual you have, it's explained in there.. Just in front of the service stamp done by the dealer.

 

There is a cheap like $15-20 brake fluid tester like this one

http://www.ebay.com/itm/like/2820206...&ul_noapp=true

You can test water content and it will tell you, if there is more water content, then time to replace. On the other hand last night I replaced my Lambo brake fluid which was 2 years old. Water content was