sorry to hear about your pronlems with your rx,I just hope I am not going down the same road as you .I would be very interested in why you had your brake master and servo units changed ,I am still not happy with the braking on my RX300SEL 2003 .the brake pedal falls away when stopped in traffic and gives the same feeling when coming to a slow stop.I would be very greatfull in your comments.
swager
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First the warning light comes on (ie the parking brake light stays on all the time) followed very shortly after by loss of virtually all braking. The brake pedal could be depressed nearly all the way to the floor with no resistance then sudden, I presume emergency, almost not controllable braking in the last 1cm of brake pedal travel.
I have now bough a BMW 535d, 0-62mph in 6.5s and 35mpg overall.
Kaldoc