2000 Audi S4

WHILE DRIVING ALONG CA-35 (SKYLINE BOULEVARD) AT APPROXIMATELY 45 MPH ON SATURDAY, APRIL 2, 2005 DURING LIGHT TO MODERATE BRAKING AROUND A CURVE, BOTH THE ABS AND BRAKE WARNING LIGHTS ON MY 2000 AUDI S4 CAME ON, ALONG WITH 3 WARNING TONES. SIMULTANEOUSLY, A SUDDEN CHANGE IN BRAKE FEEL WAS DETECTED ALONG WITH A "THUNK" NOISE FROM THE FRONT REGION OF THE VEHICLE. THE FOLLOWING WEEK, I HAD THE CAR INSPECTED BY TWO INDEPENDENT SERVICE AND REPAIR ORGANIZATIONS, BOTH OF WHICH CONFIRMED AN INTERMITTENT ELECTRONIC FAILURE IN THE VEHICLE'S ABS CONTROL MODULE (A $1000+ PART). SINCE THEN, THE VEHICLE EXPERIENCES 3-4 OF THESE INTERMITTENT FAILURES DURING THE COURSE OF A DRIVING DAY. WHEN THE FAILURE OCCURS WHEN THE VEHICLE IS NOT BRAKING, IT'S ANNOYING BUT SOMEWHAT INCONSEQUENTIAL. HOWEVER, WHEN THE PROBLEM HAPPENS DURING BRAKING, THERE IS DEFINITELY A MARKED CHANGE IN BRAKING BEHAVIOR AS THE ABS CONTROLLER GOES OFFLINE. UNDER EMERGENCY BRAKING SITUATIONS, I IMAGINE SUCH A FAILURE COULD BE A SUBSTANTIAL SAFETY AND RISK ISSUE. SOMEWHAT TAKEN ABACK BY THE TOTAL ESTIMATED REPAIR COSTS OF $1600+, I DECIDED TO DO SOME INVESTIGATION INTO THE PROBLEM AT SITES SUCH AS THIS (NHTSA ODI), AUDIWORLD.COM AND THE WEB AT LARGE. WHAT I FOUND IS A CONSISTENT PATTERN OF THIS SORT OF FAILURE ACROSS A WIDE SWATH OF AUDI MODELS DURING 1999 TO 2000. FURTHER, I HAVE ALSO LEARNED THAT THE ORIGINAL PART INSTALLED ON THE VEHICLE WAS REV. A AND REPLACEMENT PARTS BEING INSTALLED ARE REV. E. CONVEYING THIS INFORMATION TO AUDI'S CLIENT SERVICES THROUGH TWO WRITTEN LETTERS RESULTED IN NO ACTION ON THEIR PART BEYOND A CONFIRMATION OF "YOUR VEHICLE IS OUT OF WARRANTY, YOU MUST BEAR THE COST OF THIS REPAIR." THAT'D BE FINE WERE THIS A WEAR OR MAINTENANCE ITEM OR DUE TO MY OWN NEGLIGENCE; HOWEVER, I BELIEVE THE EVIDENCE STRONG THAT THIS IS A DESIGN AND/OR QUALITY CONTROL PROBLEM ON A CRITICAL VEHICLE SAFETY SYSTEM.

ABS COMPUTER MODULE FAILURE. ON THE INSTRUMENT PANEL, THE ABS LIGHT CAME ON WHLE THE BRAKE LIGHT WAS FLASHING AND BEEPING. TOOK IT OT THE DEALER AND THE ABS PUMP WITH CONTROLLER WAS/IS BAD. THE PART WITH LABOR IS $1600.00. AFTER SOME RESEARCH, THIS PART GOES BAD ALOT AND IS A MAJOR SAFTY ISSUE. IF YOU BRAKE HARD THE REAR WHEELS WILL LOCK UP AND THE CAR COULD SPIN OUT OF CONTROL.

ABS FAILURE ON 2000 S4 WITH ONLY 60,000 MILES. THE ABS FAILURE LIGHT COMES ON RANDOMLY WHILE DRIVING. I HAD THIS PROBLEM CHECKED OUT WITH A CERTIFIED AUDI MECHANIC. HE STATES THE ACTUAL PUMP IS NOT THE PROBLEM, BUT THE CIRCUITRY THAT CONTROLS THE PUMP IS DEFECTIVE, AND ALSO STATES THIS PROBLEM IS VERY COMMON IN MY MODEL VEHICLE. ABS FAILURES SHOULD BE CONSIDERED AS DANGEROUS AS A BROKEN SEAT BELT, AND SHOULD BE REPAIRED AT THE COST OF THE MANUFACTURER (AUDI)

MANY AUDI AND VW MODELS MANUFACTURED STARTING IN THE LATER '90S AND CONTINUING TO PRESENT, USE THE BOSCH 5.3 ABS CONTROLLER, WHICH IS PRONE TO CATASTROPHIC FAILURE, OSTENSIBLY DUE TO DEFECTIVE DESIGN. THIS MODULE CONTROLS MULTIPLE BRAKE-RELATED FUNCTIONS INCLUDING THE ABS WHICH IS IMPORTANT FOR WINTER DRIVING, BUT THE MOST CRITICAL FUNCTION OF THIS MODULE IS PROBABLY THE ELECTRONIC BRAKE FORCE DISTRIBUTION, OR EBD. THESE VEHICLES ARE DESIGNED SUCH THAT IF THE EBD IS INOPERATIVE, THE PROPORTION OF HYDRAULIC FORCE APPLIED TO THE REAR BRAKES DURING EMERGENCY BRAKING IS AS GREAT AS IT IS DURING MODERATE BRAKING EFFORT WHEN THERE IS MINIMAL TRANSFER OF VEHICLE WEIGHT TO THE FRONT WHEELS. THE EBD IS SUPPOSED TO ADJUST THE FRONT/REAR BRAKING DISTRIBUTION DYNAMICALLY ACCORDING TO THE MEASURE OF THE DECELERATION, SO THAT THE REAR WHEELS WILL NOT LOCK UP DURING EMERGENCY BRAKING. IF THIS MODULE SHOULD FAIL DURING EMERGENCY BRAKING ON DRY PAVEMENT, THE REAR WHEELS COULD LOCK UP AND CAUSE AN ACCIDENT WHICH COULD EASILY INCLUDE FATALITIES. THIS IS AN EXPENSIVE REPAIR FOR OWNERS, COSTING ROUGHLY $2000, AND MANY OWNERS HAVE PROBABLY PUT OFF THE REPAIR INDEFINITELY. EVIDENCE WHICH CAN BE FOUND THROUGH A SIMPLE WEB SEARCH, SUGGESTS THAT THE PROBLEM IS WIDESPREAD, AND THAT IF IT HAS NOT ALREADY LED TO SERIOUS ACCIDENTS, IT IS ONLY A QUESTION OF TIME. THIS PROBLEM IS GENUINE, AND VW/AUDI SHOULD BE COMPELLED TO TAKE IMMEDIATE CORRECTIVE ACTION.

POSTED COMMENT EARLIER ABOUT BATTERY ACID LEAKING ONTO CLUTCH LINE AND BRAKE LINE CAUSING SEVERE DAMAGE TO BOTH LINES... SPOKE WITH AUDI AND THEY STATED THAT THE ENGINE DOES NOT HAVE TO BE REMOVED FOR THE BRAKE LINE TO BE FIXED... THE MOST LIKELY CULPRIT OF THIS LEAK IS DUE AN OVERCHARGED BATTERY DUE TO A JUMP OR MANUAL RE-CHARGE (NOTE: ACCORDING TO AUDI, NEVER REPLACE THE S4 BATTERY WITH ANYTHING OTHER THAN WITH AN AUDI BATTERY... OF COURSE THEY WOULD SAY THIS, BUT HE WAS PRETTY CONVINCING... 2ND NOTE: I DO HAVE AN AUDI BATTERY IN MY S4, AND I'M STILL HAVING THE ISSUE... AUDI MAY HELP PAY FOR THIS B/C OF THAT FACT, BUT THEY HAVEN'T COMMITTED TO IT UNTIL FURTHER INVESTIGATION). THE TOTAL, ACCORDING TO OVER-THE-PHONE DIAGNOSING, WAS GOING TO BE B/N 1 AND 2 THOUSAND BUCKS AT THE DEALER.*AK

2000 AUDI S4 ABS COMPUTER MODULE IS DEFECTIVE. CODE 01203. THE ABS AND BRAKE LIGHT FLASH AND BEEP ALL OF THE TIME FOR NO REASON. THIS IS A KNOWN ISSUE WITH THE ABS UNITS. AOA HAS NOT FILLED A SAFETY RECALL FOR HTIS ITEM YET. WE NEED TO HAVE A SAFETY RECALL FOR THE ABS COMPUTER/MODULE DUE TO POTENTIAL ACCIDENTS WHEN WHEELS LOCK UP AND CAR SKIDS OUT OF CONTROL. NUMEROUS OTHER COMPLAINTS ABOUT ABS PROBLEMS AND ACCIDENTS HAVE BEEN DOCUMENTED DUE TO ABS FAILURE. IT IS A SIMPLE FIX BUT PART COSTS $1K ALONE NOT INCLUDING LABOR. LOOKED ON FORUMS, IT SEEMS TO BE A SIMPLE WIRING FIX INSIDE OF MODULE (APPARENTLY THERE IS A POOR STANDARD OF CRAFTSMANSHIP IN THE SOLDERING). *AK

ABS FAILURE: BOSCH 5.3 ABS MODULE FOUND IN VW, AUDI & PORSCHE FAIL WITHIN THE FIRST 60K MILES. ABS MODULES TYPICALLY LAST FOR WELL OVER 100K & GENERALLY FOR THE LIFE OF A CAR. AUDI CHARGES ~$1300 TO REPLACE. 3RD PARTY REPAIR IS ~$300. ABS BECOMES DISABLED & CAN CREATE UNEXPECTED SITUATIONS ESPECIALLY DURING INCLIMATE WEATHER. REPLACEMENT OR REPAIR OF THE MODULE RESOLVES THE ISSUE & ABS FUNCTIONS AS EXPECTED.*AK

MY ABS AND BRAKE LIGHTS COME ON IRRACTLY WHILE DRIVING. I HAVE CHECKED THE AND FILLED THE BRAKE FLUID RESIVOR LIKE THE MANUAL STATES. BUT STILL GET THE LIGHTS. APPARENTLY THIS IS A VERY COMMON PROBLEM FROM AUDI. *AK THE SAFTEY OF MANY PEOPLE ARE AT STAKE HERE. I WILL NOT AND HAVE NOT DRIVEN MY CAR SINCE THE LIGHTS CAME ON, AND MY LOCAL AUDI DEALERSHIP WANT $1,400. TO REPLACE! THAS RIDICULOUS FOR A CAR THAT HAS BARELY 54K MILES. YOU WOULD THINK SOMETHING AS IMPORTANT AND LIFE SAVING AS THE BRAKE SYSTEM WOULD HAVE A BETTER DESIGN AND LOWER FAILURE RATE. IM POSITIVE THAT I AM NOT THE ONLY AUDI OWNER THAT HAS FILED A COMPLAINT AND POSTIVE I WILL NOT BE THE LAST. THANK YOU FOR YOU TIME LUIS CASTELLANOS

WHILE DRIVING THE BRAKE AND ABS LIGHTS CAME ON. THE OWNER TOOK THE VEHICLE TO THE DEALER AND WAS TOLD BY THE DEALER THAT THIS DEFECT CAN CAUSE THE OTHER CONTROLLERS TO DO DAMAGE AND EFFECT THE INSTRUMENT CLUSTER. IT CAN ALSO EFFECT THE ENGINE CONTROLLER. THE OWNER ALSO CONTACTED THE MANUFACTURER WHO DID NOT THINK THAT THIS PROBLEM WAS OF NEEDED INTEREST. PROVIDE FURTHER DETAILS. *JB