- First Name
- Mike
- Joined
- May 3, 2024
- Threads
- 4
- Messages
- 4,917
- Reaction score
- 4,500
- Location
- KC Metro area
- Vehicle(s)
- 2005 Toyota RAV4, 2024 XLT Hybrid
- Engine
- 2.5L Hybrid
24MY manual points to website service schedule - and gives no interval for replacement.FYI time based fluid change is absolutely the worst way to do fluids.
But it does say inspect fluid levels and fluid on either 10K service, or the 6 month multi-point inspection - coolant says specifically the strength with refractometer.
No such recommendation for brake fluid as to best tool to use.
But if you are in humid environment, in prior cars with venting - time based was the best way.
Sitting in garage barely driven saw the same amount of humid air as one being driven.
Around hear 3-4 years was enough to see well over spec'd moisture content. At least not many long downhills to worry about!
Blew a Ford Taurus sedan or Mercury Sable wagon rear brake line from internal rust - rear brakes not replaced often, probably needed no bleeding ever. Bleeding other 3 after line replacement showed the gross stuff coming out. Did that routine as part of my used car purchase service thereafter, and for others. Always bad looking stuff. I'm guessing caps left off accidentally for chunks of time. Or using that opened bottle of fluid in garage sitting for 15 yrs.
Just did my mom's after who knows how long, - wasn't too bad.
Did the Rav4 with son after 9 yrs 80K (just looked it up, unless I missed an entry - egads!) - and my lack of attention to it showed in the disgusting fluid that came out - and the great brake pedal feel that remained.
So by time is a great way to check this fluid at least. If cap only comes off every 3 yrs - may not be a problem.
Wondering about vehicles with power-steering fluid now - at least no likely overheat conditions to cause moisture to boil on pressure side.
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