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Is it possible to buy and replace just the pump motor, or must the entire actuator assembly be replaced (~$1,700 for the part)? Also, does it make a difference if the light occasionally goes off, then comes back on again?
At the value of the vehicle( ~$2500-$4,000), it seems hardly worth it to put over $2,000 into this one component. We have been running with this issue for a while, with no noticeable affect on the driving and stopping. Does this error just mean that the Anti-lock function does not work so that they work like old fashioned, pre-ABS brakes? Or are we driving a completely unsafe vehicle?
Unfortunately, that part comes only as a unit and I understand your concern about the cost. Your vehicle is 100% safe. The brake operation is normal as if the ABS was not there. Basically, old school brakes.
The reason the light isn't always on is, if the computer runs a self test and it passes, it will not turn on the light until the next failure.