NHTSA Complaint #11253350 — 2004 BMW Z4

THIS IS A REOCCURRING PROBLEM WHICH I HAVE ATTEMPTED TO ADDRESS THROUGH BOTH LOCAL MECHANICS AND BMW WITH NO RESULTS. ESSENTIALLY, WHILE MOVING AT SLOW SPEEDS OR STOP AND GO TRAFFIC, THE ELECTRICAL SYSTEM "SHUDDERS", ALL INSTRUMENT LIGHTS ILLUMINATE, THE TRANSMISSION SHIFTS TO NEUTRAL, AND THE ENGINE SHUTS DOWN THEN RESTARTS. THE FAILURE OCCURS ON AN IRREGULAR BASIS, AFFECTING PRIMARILY THE EPS LIGHT, BUT MAY ALSO AFFECT ALL LIGHTS IN THE INSTRUMENT CLUSTER. LIKEWISE, IT MAY OR MAY NOT MOVE MY TRANSMISSION TO NEUTRAL AND IF THAT HAPPENS, MAY OR MAY NOT ALLOW MY TO PLACE IT BACK IN DRIVE WITHOUT SHUTTING THE VEHICLE DOWN FOR SEVERAL MINUTES. TO DATE, BOTH THE ALTERNATOR AND THE IGNITION SWITCH HAVE BEEN REPLACED, NO RESULTS. A BRIEF SEARCH OF POPULAR BMW FORUMS FINDS SIMILAR DESCRIPTIONS FROM OTHER OWNERS.