FlatSix911
Porsche 918 Hybrid
Agreed. Use a test strip every year for fluid contamination analysis and you are good to goWe barely even use the brakes on our Teslas. My Lexus hasn't had new fluid in at least eight years. When I had it in last year for new brakes, I asked them to replace the brake fluid. They said they tested the fluid with brake fluid test strips, and that it was fine and it didn't need to be replaced.
As a former track junkie, your experience with brake fluid is due to many repeated high heat cycles and not hydroscopic absorption.Interesting. I think if you did have it changed, you would notice an improvement in brake feel and response. Brake fluid is hydroscopic and degrades with time; it becomes more compressible, degrades brake feel, and becomes much more susceptible to fade. Internal corrosion is also an issue. All European cars I have owned have recommended two-three year replacement interval for brake fluid. Tesla is right in line with common practice for this service. A brake flush on my Mini recently cost $110 with .8 hour labor at an indy shop. Seems like a small price to keep a vital safety system in top shape.
Perhaps because of my road racing experience, I am more sensitive to this. To be competitive I had to replace brake fluid every other race weekend at a minimum. With proper tools it is an easy job for competent mechanics.
I agree with frequent fluid changes including synthetic and maintenance based on total elapsed track hours ... not months or miles.
Regarding our Tesla's ... changing the brake fluid and battery coolant every 4 years is very conservative. YMMV