Mick2

My car has 195,000 miles and somewhere in my master cylinder i have been hearing a loud squeal that sounds like a dolphin when pressing or releasing the brakes. This used to occur only in freezing temperatures but over the last 2 years this has become worse and will do it when 100 degrees. For the past 5 years my brakes feel a little mushy as if needing bleeding.

I asked a Lexus dealer about it this week and was told the electronic actuator is probably about to fail and will lose my breaks. The replacement labor and parts is not worth it and would like to change this myself with a used one. Does anyone have knowledge on how to replace the unit and how hard it is to do? Thanks.

rgarjr

iTrader: (1)

I used to have the same problem with mine, very annoying hearing that sound everytime you pressed on the brake pedal. Bought a used master cylinder/ABS pump unit and think I paid no more than 150 for the labor.

AMSMIKE

iTrader: (40)

remove the 4 lines from the unit itself
unplug all electrical connectors and sensors
remove the pin going through the brake pedal
remove the 4 bolts holding the booster to the firewall (inside the car)

pull the booster assembly out

Mick2

Thank you very much. I think I will track down a used one and attempt replacing it. Appreciate the help!

AMSMIKE

iTrader: (40)

most people upgrade to 01+

do some searches

Mick2

So then.... do 01+ master cylinder assemblies replace the current unit without modification?

sinistervr

iTrader: (1)

i dont know if it needs modification i would think not, but the 01 plus is better

Mick2

Thanks for all your help. I bought a 1999 ABS unit out of a salvage yard for $450. There was really nothing complicated about removing and installing it but it took 3-4 hours because I had a hard time getting the right angle on the 4 firewall bolts. Once installed I had it towed to a Lexus dealer who bled the system for $112. Other local mechanics said they would not bleed the brakes and that I had to have a dealer do it. My brakes work better now than they ever did. The salvage guy said the 98 and 99 models are well know for faulty ABS systems and finding a cheap used one is getting a more difficult.

sinistervr

iTrader: (1)

why didnt you choose to go with the 01 and up?

speedaddic

iTrader: (10)

I'd like to remove my ABS all together....

Mick2

I had read about using newer ABS units but when I went to the salvage yard the guy told me only 98 and 99 ABS brakes were compatible so that's why I went with the 99 model. I didn't have time to look into it more and just bought it. I hardly knew what I was doing anyway.

AMSMIKE

iTrader: (40)

I did. best thing I did!

https://www.clublexus.com/forums/sus...nd-master.html

sinistervr

iTrader: (1)

this guy used a supra one
https://www.clublexus.com/forums/gs-...ter-build.html
i have a supra one thomas, but it has abs or else i would trade you

KAJmapper

if you do end up replacing your master cylinder/brake booster components can I buy the old broken ones from you ?

Please pm me

Leonraghoo

I need help anyone who have a brake booster for a GS300 and they are selling it let me know ASAP 1347-545-8231 thanks