NHTSA Complaint #10240900 — 2007 BMW 335I

MY 2007 BMW 335 SEDAN WAS RECENTLY UPDATED WITH A NEW ECU SOFTWARE UPDATE (REFERRED TO AS PROGMAN 29.2) AND SINCE THEN THE RESPONSE HAS BECOME UNPREDICTABLE. PARTICULARLY THE CAR HAD NO TURBO LAG EARLIER AND AFTER THE UPDATE THE TURBO LAG HAS BECOME VERY PERCEPTIBLE. THIS HAS MADE HIGHWAY PASSING UNSAFE BECAUSE THE CAR DOES NOT BEHAVE CONSISTENTLY AND SOMETIMES WILL HESITATE FOR A FEW SECONDS AND THEN SURGE VERY QUICKLY AND AT OTHER TIMES DRIVE NORMALLY. THE UNPREDICTABILITY AND TURBO LAG MAKES HIGHWAY PASSING QUITE UNSAFE ESPECIALLY AT HIGHWAY SPEEDS AND GIVEN THE AMOUNT OF TORQUE IN THE CAR (SURGES ARE TOUGH TO ANTICIPATE). BMW DOES NOT ACKNOWLEDGE THE PROBLEM AND WILL NOT EVEN DO ANY TESTS ON THE CAR. THEY HAVE BEEN SENDING ME IN CIRCLES BETWEEN THEIR NA OFFICE AND LOCAL DEALER. *TR