The ABS computer on my 94 Mustang died right after the warranty expired. The board and actuator valves are mated and need to be replaced as a unit. Total cost for parts alone was going to be $2000. Ford refused to slide the warranty so I have been driving regular brakes ever since,
Worst so far is our 06 Tacoma. We just paid $825 to the dealer to have both front brake calipers replaced (non-Toyota parts even). It is a ~10k miles/year daily driver yet somehow the inboard pistons on both sides seized.