Reliability, what owners report, and what it costs to keep.
AVOIR's read: a solid ownership case with specific caveats below.
Owners have filed 26 complaints with NHTSA about the 1998 BMW 540i, and it carries 1 recall. 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 |
|---|---|---|
| Engine and engine cooling | 16 | 62% |
| Latches/locks/linkages | 2 | 8% |
| Structure | 2 | 8% |
| Air bags | 1 | 4% |
| Suspension | 1 | 4% |
| Parking brake | 1 | 4% |
| Visibility | 1 | 4% |
| Steering | 1 | 4% |
| Power train | 1 | 4% |
Verbatim from NHTSA complaint records, trimmed for length.
While stopped (engine still running) at a gas station, the driver side airbag and driver side side curtain airbag both went off. The battery disconnect feature was also triggered. Very lucky I wasn't driving when this oc
NHTSA complaint: Air bags
WHITE STEAM WAS COMING FROM UNDER THE HOOD ONTO THE FRONT WINDSHIELD. THE STEAM WAS FOGGING THE WINDSHIELD, AND CAUSING POOR VISIBILITY WHILE DRIVING 50-55 MPH. CONSUMER WAS ABLE TO GET THE VEHICLE TO A REPAIR SHOP. DEAL
NHTSA complaint: Engine and engine cooling
2ND CATASTROPHIC RADIATOR FAILURE. NOT A LEAK, THE NECK BREAKS OFF CAUSING IMMEDIATE LOSS OF COOLING. 1ST RADIATOR AT 45K, 2ND AT 92K. BASED ON OTHER'S EXPERIENCES, THIS IS VERY COMMON FOR THIS MODEL (AND EVEN LONGER LIF
NHTSA complaint: Engine and engine cooling
I WAS DRIVING DOWN A BUSY STREET ONE EVENING AND AS I CAME TO A LIGHT, SMOKE STARTED COMING OUT OF MY HOOD. FORTUNATELY IT WAS IN THE EVENING AND TRAFFIC WAS LIGHTER THAN USUAL. I PULLED INTO A PARKING LOT OFF THE SIDE
NHTSA complaint: Engine and engine cooling
PLASTIC NECK OF RADIATOR ON MY '98 BMW 540IA BROKE COMPLETELY AND SUDDENLY ON HIGHWAY. WHITE SMOKE CAME OUT UNDER THE HOOD. SAW TEMP GAUGE CLIMB UP RAPIDLY. PULLED OVER IMMEDIATELY. TOWED TO DEALERSHIP FOR REPAIR. NO ONE
NHTSA complaint: Engine and engine cooling
MULTIPLE COOLANT DEFECTS ON THE 1998 540. THE CAR HAS NOW HAD 3 RADIATORS, 3 THERMASTATS, WATER TUBE SEALS REPLACED TWICE, AND A WATER PUMP. THE COSTS HAVE BEEN OVER $3,500. THESE LEAKS ARE NOT JUST EXPENSIVE, THEY PO
NHTSA complaint: Engine and engine cooling
ENGINE COOLING RADIATOR HOSE FITTING BROKE OFF. LOST ALL COOLANT ON HIGHWAY. DEALER REPLACED RADIATOR UNDER WARRANTY AND STATED IT IS COMMON FAILURE ON 540I BMW DUE TO PLASTIC PARTS NOT STONG ENOUGH TO RESIST TEMPERATUR
NHTSA complaint: Engine and engine cooling
DRIVER-SIDE FRONT WHEEL BEARING MAKES NOISE WHEN WHEEL SPINS FREELY. THIS WAS REPORTED SEVERAL TIMES TO DEALER IN PAST. DEALER REPLACED PASSENGER-SIDE FRONT BEARING ! DRIVER-SIDE BERAING STILL NOISY. WAITING FOR COMPLE
NHTSA complaint: Suspension
NHTSA lists 1 recall campaign for the 1998 BMW 540i. Recalls are free to have fixed at a franchised dealer regardless of who owns the car now, but only if they were never done, so check the VIN of the specific car rather than trusting the model.
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE DIFFERENTIAL PINION SHAFT WITHIN THE DIFFERENTIAL CASE ASSEMBLY WAS PRODUCED WITHOUT THE APPROPRIATE SURFACE HARDENING. THIS CAN RESULT IN THE SHAFT EXPERIENCING PREMATURE WEAR.
Risk: THIS CONDITION WILL CAUSE A NOISE FROM THE DIFFERENTIAL AND, ULTIMATELY, FAILURE OF THE SHAFT AND LOSS OF DRIVE.
Fix: DEALERS WILL REPLACE THE ENTIRE DIFFERENTIAL ASSEMBLY.
| Reliability raw | 88 | excellent |
|---|---|---|
| Longevity est. | 79 | good |
| Maintenance | 61 | average |
| Depreciation | 65 | good |
| Performance | 68 | good |
| Efficiency | 35 | below average |
Percentile ranks against other compact cars in the catalog.
What stands behind each score for this car:
Owners have filed 26 complaints with NHTSA for this model-year, and engine and engine cooling is the most reported area with 16 of them (62%). There is 1 recall on record. Check any specific car against its VIN before buying.
AVOIR scores its reliability 88/100 (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 79/100, but that figure is an estimate built from the powertrain and the brand's record, not a measurement. A 1998 car has no 200,000-mile population to observe yet, so treat it as a prior rather than evidence.
AVOIR's read: worth a look, because a solid ownership case with specific caveats below. Its overall ownership score is 70/100. 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.