Okay first time posting but need to see if anyone has advice or a solution. 2001 prius 195k on it. No codes relating to abs. No brake line leaks nor leaks at the wheels. Car bleeds off brakes at stoplights. I have diagnosed it as a bad master cylinder is that a correct diagnosis? That being said master cylinders for Gen 1s are discontinued and I dont see any aftermarket solutions. Does anyone know of a retro fit or should I do the "rebuild kit" that has a new piston seal and retainer (my worry there is a possible worn cylinder) or is my best bet to find one at a junkyard or a full blown parts car. Thanks in advance.
You talking about the part that pedal connects to ? I believe that's a somewhat normal hydraulic 3/4 bore type master cylinder. If so very rebuild able.. but usually leak downs are in accumulator.
How would I go about checking and or verifying which component is the issue? Rather than throw parts at it that are expensive and discontinued?
Can you give any more detail on exactly what happens at stoplights, and how you went about your diagnosis that it's the M/C? If you're right, you're in luck, in that gen 1 had an inexpensive M/C rebuild kit available, which later gens did not.
