1999 Audi A4 SERVICE BRAKES, HYDRAULIC

ABS UNIT FAILURE, NOT REPLACED YET DUE TO HIGH COST OF REPAIR

THE ABS AND BRAKE LIGHT CAME ON AT ABOUT 86000 MILES EVENTHOUGH THE UNIT HAS BEEN VERY SELDOM HAVE BEEN ACTUATED. IT COST ME $2000 FOR AN ITEM THAT HAS BEEN RARELY USED OR ACTUATED IN MY CAR.*AK

THE ABS SYSTEM IN MY VEHICLE FAILED OUT OF THE BLUE WITHOUT ANY TRIGGER FOR IT. THE ABS WARNING LIGHT IS BLINKING IN THE INSTRUMENT PANEL. AS A RESULT, THE ABS SYSTEM IS NOT FUNCTIONING. I CONTACTED THE DEALER AND THE QUOTE TO FIX THE PART WAS ABOUT $1500. *JB

DT: 1999 AUDI A4 QUARTO 1.8T. THE CONSUMER STATES THE ABS CONTROL MODULE IS DEFECTIVE. WHEN DRIVING THE ABS LIGHT AND BRAKE LIGHT WOULD COME ON. THIS HAS BEEN HAPPENING FOR THE PAST MONTH. THE VEHICLE WA STAKEN TO THE DEALERSHIP AND THEY INDICATED THE ABS MODULE HAD TO BE REPLACED. *AK

99V131001/BRAKE BOOSTER VACUUM VALVE. THE OWNER IS EXPERIENCING THE SAME DEFECTS THAT ARE DESCRIBED IN THE RECALL. HOWEVER, THE VEHICLE IDENTIFICATION NUMBER WAS NOT INCLUDED IN THE RECALL. *JB

ABS AND BRAKE LIGHTS ON DASH REMAIN ACTIVATED; MECHANIC SAYS ABS COMPUTER MODULE IS NOT FUNCTIONING. VERY EXPENSIVE REPAIR - $1500. I HAVE READ OF OTHER REPORTS OF SAME DEFECT IN SAME MODEL/YEAR BUT NO SERVICE BULLETIN I CAN FIND.*AK

FAILURE OF A BOSCH 5.3 ABS HYDRAULIC CONTROL UNIT (PART # 8E0 614 111A) IN A 1999 AUDI 1.8 TURBO QUATTRO WITH 53,000 MILES.

ABS PUMP FAILURE. AT APPROX. 71000 MILES, THE ABS CONTROLLER/PUMP FAILED ON MY 1999 AUDI A4 1.8T QUATTRO. THERE ARE MANY OTHERS THAT I HAVE SPOKEN TO AND READ ABOUT WHO HAVE ALSO HAD THE EXACT SAME FAILURE WITH THE SAME ABS PUMP/CONTROLLER. HTTP://TECH.BENTLEYPUBLISHERS.COM/THREAD.JSPA?THREADID=3409&TSTART=0 AND HTTP://FORUMS.AUDIWORLD.COM/A4/MSGS/1743701.PHTML . APPARENTLY, AUDI KNOWS ABOUT THE PROBLEM BUT IS NOT WIDESPREAD ENOUGH TO ISSUE A RECALL.*AK

THE CONSUMER STATES THAT THE VEHICLES LEFT REAR BRAKES FAILED. ALSO STATES THAT THE VEHICLE OFTEN FAILED TO STOP DURING WET CONDITIONS, THE CONSUMER WILL PRESS THE BRAKES AND THERE IS A DELAY BEFORE THEY WOULD ENGAGE. THIS HAPPENED TWICE, AND ALMOST RAN INTO AN INTERSECTION, THE LEFT REAR BRAKES SQUEAK CONSTANTLY UPON APPLICATION. THE VEHICLE WAS TAKEN TO THE DEALER ONCE TO FIX AND IT STILL SQUEAKS. SCC PH

WHEN THE BRAKE WAS APPLIED, THE VEHICLE EXPERIENCED EXTENDED STOPPING DISTANCE.*JB

NAR 1/15/2003. THE VEHICLE OFTEN FAILED TO STOP DURING WET CONDITIONS. WHEN THE CONSUMER APPLIED THE BRAKES, THERE WAS A DELAY BEFORE THE BRAKES ENGAGED, WHICH HAS HAPPENED TWICE. IT ALWAYS SEEMS TO BE A PROBLEM WITH THE LEFT REAR BRAKE. *JB

WET BRAKING 2/3 SECOND DELAY OF BRAKING POWER WHEN DRIVING IN RAIN AT HIGHWAY SPEED. DT

CONSUMER STATES THAT WHILE TRAVELING AT HIGHWAY SPEED THE VEHICLES BRAKE PEDAL WENT TO THE FLOOR, CONSUMER HAD TO USE EMERGENCY BRAKE TO STOP. TOOK TO DEALER, DEALER STATED ABS PUMP FAILED AND BRAKE FLUID LEAKED OUT, CAUSING LOSS OF PEDAL PRESSURE. PLEASE PROVIDE ANY FURTHER INFORMATION. MR

MY 1999 AUDI A4 EXPERIENCES DELAYED BRAKING DURING PERIODS OF MODERATE TO HEAVY RAIN.*AK

AFTER TRAVELING FOR SEVERAL MINUTES ON FREEWAYS IN RAIN STORMS THE FIRST APPLICATION OF THE BRAKES DOES NOT SLOW THE CAR. THERE IS A 1-2 SECOND DELAY BEFORE THERE IS ANY BARKING FORCE REGARDLESS OF PEDAL PRESSURE. THIS ISN'T MERELY THE TYPICAL LACK OF INITIAL BITE ON WET BRAKES AS WITH WET BRAKES THE BRAKE FORCE WILL INCREASE WITH INCREASED PEDAL PRESSURE. WHEN THIS HAPPENS, INSTINCTS ARE TO PRESS THE BRAKE HARDER AND WHEN THE WATER IS FINALLY SHED THE CAR WILL PULL SHARPLY IN REACTION TO WHICH EVER OF THE BRAKES 'DRIES' FIRST. AUDI HAS DESIGNED AND SELLS A PLASTIC WING THAT FITS AROUND THE INSIDE OF THE WHEEL WELL AT THE UNDERBODY/WHEEL WELL INTERFACE TO COMBAT THIS BUT IT ONLY MAKES A MARGINAL IMPROVEMENT. IN ADDITION, THE 2002 AUDI A4 COMES EQUIPED WITH THIS SAME SHIELDING IN AN APPARENT AWKNOWLEDGEMENT OF THE ISSUE.*AK

UNDER WET ROAD CONDITIONS AND HARD RAIN, WHEN APPLYING BRAKES, CONSUMER HAS TO PUMP BRAKES A FEW TIMES BEFORE THERE IS ANY BRAKING ACTION. DEALER CANNOT FIND PROBLEM. *AK *SLC

THERE HAS ALWAYS BEEN A PROBLEM WITH THE BRAKING PERFORMANCE OF THIS VEHICLE DURING WET CONDITIONS. THIS IS ONLY DURING HIGHWAY OR COUNTRY DRIVING WHERE THE BRAKES ARE NOT FREQUENTLY APPLIED. WHEN BRAKE PEDAL PRESSURE IS APPLIED DURING THESE CONDITIONS, THERE IS APPROXIMATELY A 1 TO 2 SECOND DELAY BEFORE THE BRAKES START TO RETARD SPEED. IT FEELS OR SEEMS LIKE THERE IS A FILM OF WATER BETWEEN THE DISCS AND PADS AND THIS HESITATION IS OCCURRING WHILE SQUEEZING OR DRYING OUT THIS FILM OF WATER. *AK

WHENEVER ROADS ARE WET AND BRAKE ROTORS FAIL VEHICLE IS VERY DIFFICULT TO STOP. BRAKES FAIL TO RESPOND, CAUSING EXTENDED STOPPING DISTANCE. CONSUMER HAS CONTACTED DEALER, DEALER UNABLE TO DETERMINE CAUSE OF PROBLEM. *AK DEALER REPLACED BRAKES, CONSUMER STATES PROBLEM HAS SOMEWHAT IMPROVED. *SLC

IT'S THE AUDI WET BRAKING PROBLEM. *AK

WET BRAKING PROBLEM--I HAVE NO BRAKES (DELAYED) FOR THE FIRST 2-4 SECONDS DURING, OR AFTER A RAIN.*AK

BRAKES HAVE A HUGE DELAY WHEN DRIVING IN WET CONDITIONS. UNLIKE ANY CAR I HAVE EVER DRIVEN. WHEN TRAVELING AT HIGHWAY SPEEDS IT CAN BE AS MUCH AS A ONE SECOND DELAY UNTIL THE BRAKES KICK IN. I HAVE CONTACTED THE DEALER AND THEY SAY THAT THIS PROBLEM CAN'T BE FIXED. MY ONLY HOPE IS THAT AUDI OF AMERICA WILL DO SOMETHING ABOUT THIS.

POOR WET WEATHER BRAKING - ALL TIMES - ABOUT A 2 SECOND DELAY BEFORE BRAKES GRAB

WHEN DRIVING BETWEEN 50-55 MPH AND UPON DEPRESSING BRAKE PEDAL TO MAKE A GRADUAL STOP SLOWLY PUMPING THE BRAKES, BRAKE PEDAL TRAVELED TO THE FLOORBOARD, CAUSING EXTENDED STOPPING DISTANCE. CONSUMER NOTED THAT PRIOR TO THE INCIDENT BRAKE LIGHT WAS ILLUMINATING ON THE DASHBOARD. VEHICLE CURRENTLY AT THE DEALER AWAITING SERVICE. PLEASE PROVIDE ANY FURTHER DETAILS.*AK

WET DISC BRAKES HAVE NO STOPPING ABILITY FOR 1-2 SECONDS. DRY BRAKES FUNCTION NORMALLY

WHILE TRAVELING ON WET ROADS AND UPON DEPRESSING BRAKES, THEY FAILED, RESULTING IN EXTENDED STOPPING DISTANCE. PLEASE PROVIDE FURTHER INFORMATION.*AK