1997 BMW 3 Series

WHEN I WAS AT A STOP LIGHT, MY ENGINE BEGAN TO ACCELERATE WITH MY FOOT ON THE BRAKE. WHEN THE LIGHT TURNED GREEN THE ENGINE CONTINUED TO REVVE HIGHER. IT DID NOT TAMPER DOWN UNTIL I PUT THE CAR IN NEUTRAL. THE ENGINE CONTINUED TO REVVE WHEN I BEGAN TO DRIVE AGAIN UNTIL I CAME TO MY DESTINATION AND PLACED THE CAR IN PARK AND SHUT THE ENGINE OFF. IT DROVE FINE WITHOUT FURTHER INCIDENT THAT DAY. BEFORE THE INCIDENT I HAD TURNED ON THE A/C. ON TUESDAY (2 DAYS LATER) IT UNINTENTIONALLY ACCELERATED AGAIN AT HIGHER REVOLUTIONS AT THE SAME STOP LIGHT. I REPEATED WHAT I DID BUT THIS INCIDENT, THE CAR DID NOT THROTTLE DOWN. IT WAS AS IF IT WAS IN MANUAL MODE WITH THROTTLE FULLY OPENED. I HAD TO PUT THE CAR IN NEUTRAL THEN PARK. MY DESTINATION AT BOTH TIMES WAS 10 MIN AWAY. IT DROVE FINE EVER SINCE. I HAD THE CAR ABOUT A WEEK. I DID TEST DRIVE THE CAR AND IT DID NOT HAVE ANY HISTORY OF THIS.

IT IS COMMON KNOWLEDGE THROUGH CAR CLUBS, PARTS SUPPLIERS AND THE MECHANICS PROVIDING REPAIRS THAT THE ELECTRONIC CLIMATE CONTROL UNIT OFTEN FAILS COMPLETELY OR BECOMES INTERMITTENT IN OPERATION. WHEN IT FAILS THERE IS NO CONTROLS OR CHANCE OF CHANGING FUNCTIONS. THIS ALLOWS THE CONDITION TO EXIST THAT THE VEHICLE OPERATOR CAN NOT SELECT THE WINDSHIELD DEFROSTER FUNCTION AND POSSIBLY IMPAIRING THE DRIVERS ABILITY TO VIEW THROUGH THE WINDSHIELD. I HAVE TWO CARS OF THIS BUILD TYPE AND THEY BOTH HAVE THIS PROBLEM. THE MECHANICS REPAIR BILLS OFTEN AMOUNTS TO AN EXCESS OF $400 PER REPAIR. HERE IS A QUOTE FROM A REPUTABLE PARTS SOURCE, WWW.BAVAUTO.COM WEBSITE: THIS IS THE DIGITAL CLIMATE CONTROL COMPUTER. THESE ARE A COMMON FAILURE ITEM ON ALL 1996-1999 3 SERIES. WHEN THESE FAIL, THE LCD SCREEN WILL GO DIM/BLANK (USUALLY IINTERMITTENTLY AND EVENTUALLY PERMANENTLY) AND THE VENTILATION & AIR SYSTEM WILL NOT FUNCTION." PART NUMBER: 64 11 8 379 521 DESCRIPTION: CLIMATE CONTROL COMPUTER MODULE - IN-DASH RICE: 74.95. *AK