Power steering fluid in the brake line

[Jmy11301960]

I have accidentally put power steering fluid in the brake fluid resevoir.  Does everything in the brake system need to be replaced or is the master cylinder enough?

[Exhaustgases]

Total system drain and flush.  So this means the ABS system, and trac if you have it. This is a better project for the lexus dealer since they have the correct tools to do it.

So did you push the pedal after adding the fluid?  Since its setting in there it polluted all the brake fluid I'm sure.

And one other tid bit, you should not have any power steering fluid bottle anywhere near a 1992 LS400, there is nothing on the car that uses it.

The power steering system has listed in the owners manual as well as the cap for the powersteering that you are to use only Dexron automatic transmission fluid.

And another important thing, you DO NOT use that same Dexron in the transmission. The transmission takes the Toyota IV fluid.

You may not need to change the master cylinder or anything else, just a good drain and total system flush. Time will tell though, if it ruins the brake system then the car is likely a total loss unless you do mechanic work and can fix everything.

When adding fluids it is best to study things well, there is a lot on the forums how to and what is supposed to be used.

[pj8708]

Hi Bob,

Do you know in what year Lexus went to the power steering system with fluid?

Paul

[Exhaustgases]

I only know 1990 to 1994. I don't think they ever did, but don't know that for sure.