Z4 (E85)
Reliability Score
Complaints by Engine Code
M54B25
2.5L 6-cyl / 184 hpView details
Complaint Breakdown
M54B30
3.0L 6-cyl / 225 hpView details
Complaint Breakdown
BMW Z4 Unidentified Engine
View details
Complaint Breakdown
Show 2 additional engine variants with limited data
3.2-V6-Gas
3.2L 6-cyl / 330 hpView details
Complaint Breakdown
1.6-I4-Gas
1.6L 4-cyl / 175 hpView details
Complaint Breakdown
Owner Complaints by System
Complaints owners filed with NHTSA about the BMW Z4, counted across every engine. A complaint can name more than one system.
What to check on a used 2003-2008 BMW Z4
On a used 2003-2008 BMW Z4, the systems with the most NHTSA owner complaints are the steering (958), the airbags and driver-assist systems (86) and the electrical system (58). Each one has an inspection step below, with counts as of 2026-10-12. A complaint is an owner report, not a confirmed defect, and counts rise with sales.
- Turn the wheel from lock to lock while parked, then drive straight on a level road with a light grip.Safety. NHTSA has 958 owner complaints on the 2003-2008 BMW Z4 about the steering.
- Switch the ignition on and watch the airbag light. On the drive, check the backup camera and any collision or lane warning.Safety. NHTSA has 86 owner complaints on the 2003-2008 BMW Z4 about the airbags and driver-assist systems.
- Switch on every electrical item in turn: lights, windows, locks, wipers, climate fan, screen and power outlets.Costly repair. NHTSA has 58 owner complaints on the 2003-2008 BMW Z4 about the electrical system.
- Start the engine cold and listen for the first 30 seconds, then again at idle once it is warm.Costly repair. NHTSA has 36 owner complaints on the 2003-2008 BMW Z4 about the engine, all engines combined.
- With the engine cold, check the coolant level and color, then watch the temperature gauge on the drive.Costly repair. NHTSA has 23 owner complaints on the 2003-2008 BMW Z4 about the cooling system, all engines combined.
Recalls (7)
BMW of North America, LLC (BMW) is recalling certain 2008-2013 1 Series Coupe (128i); 2007-2013 3 Series Coupe (328i, 328xi, 328i xDrive); 2007-2010 X3 SAV (X3 3.0si, X3 xDrive30i); 2008-2013 1 Series Convertible (128i); 2006-2011 3 Series Sedan (325i, 325xi, 328i, 328xi, 328i xDrive, 330i, 330xi); 2006-2012 3 Series Wagon (328i, 328i xDrive); 2007-2013 3 Series Convertible (328i); 2006-2010 5 Series Sedan (525i, 525xi, 528i, 528xi, 530i, 530xi); 2006-2007 5 Series Wagon (530xi); 2007-2010 X5 SAV (X5 3.0si, X5 xDrive30i); 2006-2008 Z4 Coupe (Z4 3.0si); and 2006-2011 Z4 Roadster (Z4 3.0i, Z4 3.0si, Z4 sDrive30i) vehicles. The heater for the positive crankcase ventilation (PCV) valve may short circuit.
BMW of North America, LLC (BMW) is recalling certain 2006 525i, 525xi, 530i, 530xi, 530xi Sports Wagon, 325i, 325xi, 325xi Sports Wagon, 330i, 330xi, Z4 3.0i and Z4 3.0si vehicles. The heater for the positive crankcase ventilation (PCV) valve may short circuit.
BMW of North America, LLC (BMW) is recalling certain 2008-2011 128i and 2007-2011 328i, 328xi, 328i xDrive, 525i, 525xi, 528i, 528xi, 530i, 530xi, X3 3.0si, X3 xDrive30i, X5 xDrive30i, Z4 3.0i, Z4 3.0si and Z4 sDrive30i vehicles. The heater for the positive crankcase ventilation (PCV) valve may short circuit.
ON CERTAIN PASSENGER VEHICLES, INCOMPATIBLE ELECTRONIC AIR BAG SYSTEM PROCESSORS MAY HAVE BEEN INSTALLED.
ON CERTAIN PASSENGER VEHICLES, UNDER CERTAIN ENVIRONMENTAL CONDITIONS, A VAPOR LOCK IN THE FUEL PUMP COULD OCCUR CAUSING THE ENGINE TO STALL. IF THIS WERE TO HAPPEN, THE ENGINE WOULD NOT BE ABLE TO BE RESTARTED FOR APPROXIMATELY 15 TO 20 MINUTES.
Show 2 older recalls
ON CERTAIN VEHICLES EQUIPPED WITH 18" TIRES, IT IS POSSIBLE THAT THE TIRE HAS BEEN DAMAGED DURING THE MOUNTING PROCESS TO THE RIM.
ON CERTAIN PASSENGER VEHICLES, THE CONNECTION OF THE SAFETY BELT BUCKLE TO THE STEEL ROPE OF THE TENSIONER DOES NOT MEET BMW SPECIFICATIONS. IN SEVERE FRONTAL CRASHES, THIS CONNECTION CAN DETACH.
All Generations
Alternatives in Roadster
Frequently Asked Questions
What are the most common 2003-2008 BMW Z4 complaints?
Owners have filed 1,151 complaints with NHTSA about the 2003-2008 BMW Z4. The systems they name most often are the steering, the safety systems and the electrical system.
Is the 2003-2008 BMW Z4 a good used car?
That depends on the model year, the mileage and the maintenance history of the car in front of you. Owners have filed 1,151 complaints with NHTSA about the 2003-2008 BMW Z4. Check which systems they name most often and whether a recall is still open on that car.
How many NHTSA complaints does the 2003-2008 BMW Z4 have?
NHTSA has 1,151 owner complaints on file for the 2003-2008 BMW Z4 as of the latest data pull. A complaint is an owner's report, not a confirmed defect, and counts rise with sales.
What recalls affect the 2003-2008 BMW Z4?
NHTSA lists 7 recalls covering some 2003-2008 BMW Z4 vehicles. Which ones apply depends on the VIN: enter it at nhtsa.gov/recalls to see the open campaigns on a specific car.
What should I check before buying a used BMW Z4?
Run the VIN through NHTSA's recall lookup and confirm every open recall has been done. Look hardest at the steering, the safety systems and the electrical system, the systems owners complain about most. Ask for maintenance records, have an independent mechanic inspect the car and run a vehicle history report for prior accidents and title issues.
Does the Z4 have NHTSA crash test ratings?
NHTSA has not published crash test ratings for the 2003-2008 BMW Z4. Not all vehicles are tested each year. For the latest NHTSA safety information, visit nhtsa.gov/ratings.
Data from NHTSA federal complaints database. 1,151 complaints analyzed. Data confidence: high. Last updated: 2026-10-12.