Losing Brake Fluid

[venos]

I have a 1998 lexus gs300se,its done 87000 miles and for the last 3 weeks ive been losing brake fluid,i have to top up virtually every time i use the car yet the brakes seem fine,no warning lights appearing and no sign of fluid on my drive,i would be very grateful if anyone has any idea whats going on

[TigerFish]

Anything on the carpet below the pedals?

Sent from my Iphone using Lexus OC

[venos]

Thanks for the reply,no,nothing on carpet,completely dry,i have a feeling the master cylinder is leaking,i can see a damp patch just underneath yet no sign on the floor,i wonder if its dripping onto exhaust and being burned off

[Mihanicos]

If your brakes have a vacuum servo to assist the brake master cylinder, then the brake fluid is sucked in the servo due to the vacuum created by the engine.

Check the brake master cylinder seals or replace them.

Good luck

Mihanicos

[mattmanic]

I'm having the same problem, went to lexus today to have my brake fluid changed and they wouldn't do it because they said it was leaking, and I'd noticed the level go down a lot recently too.

Does anyone know where to get the master cylinder seal kit? http://www.lexuspartsnow.com/oem-lexus-gs300-master-cylinder-repair-kit.html Part numbers are there, no one in the UK has them! And I'm scared to ask a Lexus dealer after they told me they could fix my leak for £3000 plus labour today...

FYI, my car is also a '98 GS300 with 90k miles on the clock

[ColinBarber]

04493-30280 is the part code for the master cylinder kit. Should be around £90 from your dealer.

http://www.toyodiy.com/parts/p_E_1998_LEXUS_GS300%7E430_JZS160R-BEAQFW_4702.html