Brake fluid absorbs moisture over time and this affects brake system integreity and safety.

Lexus recommends replacement every three years. .. Off the wall at McGrath Lexus..
If you don't know if your fluid has been changed, then it probably hasn't...
Achtung
Most independent shops do not have the special service tool necessary to properly bleed the anti-lock brake solenoid unit...

 

What is the name of the "special tool?"Thanks.

 

A switch box for the gen 1's. I think a good 2 way scan tool for the newer stuff will work.

 

You remove the brake fluid reservoir cap and screw on a cap with a port that accepts low air pressure to bleed the anti-lock brake solenoid assembly. (My 99 has bleeder sctews for this purpose)

Unless you have this special service tool the system does not fully purge air bubbles and, or, old fluid...

Tool is posted elsewhere under brakes....don't have time to look for it now.

 

Or make your own:

 

I always vacuum the brakes. I've seen the pressure ones leak and mess up the paint, brake fluid makes great paint remover.

 

I've used the pressure method and the old school method on most Toyota/Lexus products - it's only TRAC-equipped cars you need to bleed the accumulator and solenoid pack separately - I think running the car, bridging two terminals in the TDCL under the dash and cracking the bleeder screw will do the trick. UCF10/20s don't have brake-by-wire/VDIM or anything else that needs Techstream to disable/enable/cycle.