There are 2 owner-reported body & structure complaints for the 2004 BMW Z4in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
MY BMW 2004 Z4 DOOR ON THE PASSENGER SIDE WOULD NOT OPEN. THE INSIDE AND OUTSIDE HANDLES WOULD NOT OPEN THE DOOR. SHORTLY AFTERWARDS THE DRIVERS SIDE DOOR HANDLE BEGAN TO FAIL INTERMITTENTLY. I WAS LOCKED INSIDE MY VEHICLE WITHOUT THE ABILITY TO GET OUT. *TR
IN THE FALL, 2010, MY BMW 2004 Z4 STOPPED AUTOMATICALLY OPENING AND CLOSING THE CONVERTIBLE TOP. ACCORDING TO THE MECHANIC THERE IS A KNOWN PROBLEM WITH THE MOTOR ASSOCIATED WITH IT. THE MAIN MOTOR GETS WATER TRAPPED INSIDE THE PLASTIC HOUSING WHCIH CAUSES THE MOTOR TO FAIL. I NEED TO REPLACE THE MOTOR, AS MANY OTHER OWNERS HAVE. BMW KNOWS OF THIS PROBLEM AND SHOULD DO A RECALL/REPLACEMENT WITH IT'S UPDATED PLASTICE HOUSING OF THE MOTOR. IT WILL COST APPROXIMATELY $3000 TO FIX IT. IT IS A KNOWN DEFECT. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026