Lexus RX 300 Forum : “ABS kicking in but no ABS light?”

I would take this to a dealership.  It could conceivably be a bad speed sensor, but this usually shows up as a code causing the ABS light to come on.  Probably the controller is malfunctioning, or perhaps the ABS unit itself has taken a dump, and doesn't even know to record codes, although typically the PCM would reflect this when it tried communicating with the ABS controller and got no response.  Short answer, a dealership is the only place that's going to be able to tell you exactly what is wrong.

How did you make out with abs problem

Do you remember the guy with ABS problem

I have simila one and someone told me that I need a Abs motor cause it comes on by itself at take off