IF I TRY TO BRAKE OVER ROUGH OR SLIPPERY PAVEMENT IN MY 2002 SUBARU IMPREZA WRX, THE ABS SYSTEM SHUTS OFF THE BRAKES. POTHOLES, MANHOLE COVERS, FROST HEAVES, ICY PATCHES, ANY OF THESE CAUSE THIS BEHAVIOR. ALSO, IN NOVEMBER 2004, WHILE DRIVING DOWNHILL AT ABOUT 30 TO 35 MPH ON DRY AND MOSTLY CLEAN PAVEMENT, A TRUCK DRIVING IN FRONT OF ME BRAKED GRADUALLY. I HIT MY BRAKES TO MAINTAIN A DISTANCE, BUT IT WAS A SECTION OF RIPPLED PAVEMENT AND THE ABS SYSTEM SHUT OFF THE BRAKES SO COMPLETELY FOR ABOUT 10 SECONDS. MY CAR WAS ACTUALLY PICKING UP SPEED DUE TO THE DOWNHILL. I AM SURE THAN IN ANY OTHER CAR I'VE HAD, I WOULDN'T HAVE HAD ANY TROUBLE SLOWING DOWN. I AVOIDED REAR-ENDING THE TRUCK BY SLOWING THE CAR WITH AGGRESSIVE ENGINE BRAKING. I ALSO STEERED TOWARDS THE OTHER SIDE OF THE ROAD, WHERE THERE WAS NO TRAFFIC AT THAT MOMENT AND THE PAVEMENT WAS CLEANER, SO I COULD SLOW DOWN. ANOTHER TIME I REAR-ENDED A VEHICLE THAT STOPPED IN FRONT OF A POTHOLE, ALTHOUGH DAMAGE WAS MINOR. I'VE ALSO HAD A LARGE NUMBER OF SCARY NEAR - MISSES WITH REAR-ENDING OTHER VEHICLES, AND ON A FEW OCCASIONS SLID OUT INTO INTERSECTIONS WITH FROST HEAVES LEADING UP TO A STOP SIGN OR STOP LIGHT, BECAUSE MY BRAKING SPACE ESTIMATE WAS FAR LESS THAN I ACTUALLY NEEDED. I RECENTLY REPLACED ALL BRAKE PADS AND DISCS. THE REAR PADS FIT IN THE CALIPERS SO TIGHTLY I HAD TO POUND THEM OUT WITH A HAMMER AND PUNCH. BOTH PADS AND ROTORS WERE WORN VERY UNEVENLY. REPLACEMENT REAR PADS FIT IN THE SAME WAY. THEN I REALIZED SOMETHING WAS WRONG WITH THE FIT, SO I GROUND DOWN THE TABS TO GET A GOOD SNUG FIT RATHER THAN AN INTERFERENCE FIT AND JAMMING, SO THEY SLIPPED INTO PLACE NORMALLY. AFTER MAKING THIS CHANGE TO MY BRAKES, THEY WORK VERY WELL. I NEARLY SOLD THE CAR DUE TO THIS ISSUE, BUT INSTEAD DROVE IT FOR A WHILE WITH THE ABS SYSTEM DISABLED. MY LOCAL SUBARU DEALER TOLD ME THIS IS HOW ABS SYSTEMS ARE SUPPOSED TO WORK, EVEN THOUGH THERE IS CLEARLY A BIG PROBLEM.