Reliability, what owners report, and what it costs to keep.
AVOIR's read: running costs are the problem rather than the car itself.
Owners have filed 141 complaints with NHTSA about the 2003 BMW M3 Convertible, and it carries no recalls. These are owner allegations rather than confirmed defects, but the pattern of what people complain about is the most useful signal a used buyer has.
| Area | Complaints | Share |
|---|---|---|
| Air bags | 34 | 24% |
| Exterior lighting | 21 | 15% |
| Power train | 17 | 12% |
| Tires | 7 | 5% |
| Electrical system | 6 | 4% |
| Suspension | 4 | 3% |
| Engine and engine cooling | 4 | 3% |
| Suspension | 3 | 2% |
| Electrical system | 3 | 2% |
| Structure | 3 | 2% |
Verbatim from NHTSA complaint records, trimmed for length.
On May 01, 2026, at approximately 0230 while traveling on hwy. I75 I heard a loud pop towards the rear for the vehicle as the car started to slide. I pulled over to the right side of the road nearly hitting another vehic
NHTSA complaint: Tires
The contact owns a 2003 BMW M3. The contact received notification of NHTSA Campaign Number: 20V018000 (AIR BAGS); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had ex
NHTSA complaint: Air bags
I WAS DRIVING ON THE FREEWAY, THEN ALL OF A SUDDEN MY DRIVERS SIDE AIR BAGS DEPLOYED.
NHTSA complaint: Air bags
TL* THE CONTACT OWNS A 2003 BMW 3 SERIES. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBERS: 15V318000 (AIR BAGS) AND 13V172000 (AIR BAGS). THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT
NHTSA complaint: Air bags
TL* THE CONTACT OWNS A 2003 BMW M3. THE CONTACT STATED THAT THE ELECTRICAL SYSTEM SHORTED OUT AND ALL THE ELECTRICAL DEVICES FAILED TO WORK. THE VEHICLE DECELERATED WITHOUT WARNING AND THE ENGINE WENT INTO LIMP MODE AND
NHTSA complaint: Electrical system
BRAKE LIGHTS ON BOTH SIDES GETS STUCK ON ONCE THE PEDAL IS PRESSED. THIS PRODUCES NO ERROR CODES. I WAS TOLD IT COULD BE THE BRAKE PEDAL PRESSURE SENSOR SWITCH. I CHANGED THIS AND IT DID NOTHING. THIS IS VERY DANGEROUS T
NHTSA complaint: Exterior lighting
SMG HYDRAULIC PUMP: I WAS DRIVING ON THE HIGHWAY AT 65 MPH IN THE #1 LANE AND MY CAR ALL OF A SUDDEN DROPPED OUT OF GEAR AND MY CAR STARTED TO COAST LOSING SPEED VERY FAST, I LOOKED AT MY SPEEDOMETER AND IT WAS 45 MPH.
NHTSA complaint: Power train
REAR SUBFRAME SUPPORT IS SEPARATING FROM THE BODY WHERE IT MOUNTS TO. CRACKS AROUND THE SUBFRAME BOLTS CAN BE SEEN. PINCHWELD AROUND REAR FENDER IS SEPERATING.
NHTSA complaint: Suspension
| Reliability raw | 80 | excellent |
|---|---|---|
| Longevity est. | 77 | good |
| Maintenance | 41 | below average |
| Depreciation | 92 | excellent |
| Performance | 60 | average |
| Efficiency | 30 | below average |
Percentile ranks against other compact cars in the catalog.
What stands behind each score for this car:
Owners have filed 141 complaints with NHTSA for this model-year, and air bags is the most reported area with 34 of them (24%). No recalls are on record for it.
AVOIR scores its reliability 80/100 (excellent) from NHTSA recall campaigns and complaint density. That figure is a raw complaint count, not yet adjusted for sales volume, so a high-volume model scores worse than it deserves.
AVOIR scores its longevity 77/100, but that figure is an estimate built from the powertrain and the brand's record, not a measurement. A 2003 car has no 200,000-mile population to observe yet, so treat it as a prior rather than evidence.
AVOIR's read: skip unless cheap, because running costs are the problem rather than the car itself. Its overall ownership score is 66/100. Condition, mileage and service history still matter more than any score, so get a pre-purchase inspection on the specific car.
Sources: NHTSA recalls and complaints, EPA fuel economy, IIHS awards, and live market listings. A score describes a model-year, not the individual car in front of you. Get a pre-purchase inspection.