I was told by the local mechanic that I need to replace the “master cylinder with electric assist” and that he couldn’t find any since it’s such an old car. I think I have found some online but it’s named something different. Is there anyone here that can help me find the part I need? Send me in the right direction? I will attach a picture for some reference. Thank you for the help.
2003 4Runner Master Cylinder Question
- Thread starter Manny0583
- Start date
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Here you go, you can also find used unit on Ebay or CL. What did the mechanic tell you what's wrong with the part?
- Thread starter
- #3
He just said it was bad. I took it in because it was giving me lights and alarms, as well as the brake would sometimes not work. It seems to be fine now, but I’m not gonna risk it. I was hoping i could find the part a little bit cheaper than that. I’ll keep looking. Thank you so much for the help!
- Thread starter
- #5
It was/is leaking brake fluid but it seems fine now. Sometimes you had to really mash the brake in order for it to work, on top of the warning alarm going off. There are some lights on the dash as well. I’ll upload a picture of it once I get a chance. I just wanna make sure my daughters car is safe.What are you experiencing? Low pedal? Noise?
Sorry I didn't read the reply.
If that is the case please stop driving it since it is your daughter driving it, she may not know how to react if it fails and get in an accident. There are other sources to get a new/rebuilt unit, I have the same problem with mine but not to the point I am losing brakes my issues are with the pump/accumulator.
- Thread starter
- #7
Oh, I do NOT let her drive it nor does anyone drive it. I have her using my car. When I run it or drive it around our neighborhood to check it out, it seems to be working fine. I’m not letting her behind the wheel of it until it is fixed.
It’s a common failure. Mine gave up after 20 years and ~200k miles.
The assembly should still be available from the dealership.
The assembly should still be available from the dealership.
Last edited:
alia176
SILVER Star
These things are quite robust but the motor brushes and bearings could be the culprit due to age. You can buy both parts easily from the usual places. Listen to the ABS motor running when you first turn on the key to IGN, and see how it sounds. It typically comes on few seconds when you start the engine but not very noticeable over the engine sounds. I grabbed a spare one from a junk yard and rebuilt the motor then stuck it on the shelf as a spare.
