1997 BMW 540i

Reliability, what owners report, and what it costs to keep.

70/100

Worth a look

AVOIR's read: a solid ownership case with specific caveats below.

What owners actually report

Owners have filed 27 complaints with NHTSA about the 1997 BMW 540i, 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.

Complaints by area, from NHTSA records for this model-year
Area	Complaints	Share
Engine and engine cooling	11	41%
Seat belts	2	7%
Vehicle speed control	2	7%
Suspension	2	7%
Unknown or other	2	7%
Power train	1	4%
Engine and engine cooling	1	4%
Engine and engine cooling	1	4%
Electrical system	1	4%
Seats	1	4%

In owners' own words

Verbatim from NHTSA complaint records, trimmed for length.

PASSENGER SIDE FRONT SEATBELT LOCKS IN THE SIDE PANEL AND WONT EXTEND TO ALLOW PASSENGERS TO GET BUCKLED UP. IT DOESN'T HAPPEN ALL THE TIME BUT IT HAPPENS.
NHTSA complaint: Seat belts

INCIDENT #1 2010: ACCELERATED THE VEHICLE TO 75MPH TO ENTER FREEWAY. TOOK FOOT OFF GAS AND VEHICLE CONTINUED TO ACCELERATE. ENGAGED CLUTCH TO STOP ACCELERATION AND RPM CONTINUED TO RISE TO THE LIMITER POINT (APPROX 55
NHTSA complaint: Power train

I EXCHANGED THE LAMBDA SENSOR OF MY CAR A COUPLE OF MONTHS AGO. SUDDENLY MY MILEAGE WENT DOWN AND I STARTED AN ERROR SEARCH. SINCE I WAS DOING A COUPLE OF OTHER THINGS ON THE CAR I DIDN'T COME UP WITH THE SENSORS UP FRON
NHTSA complaint: Engine and engine cooling

WHEN CRUISE CONTROL IS ACTIVATED, THE VEHICLE ACCELERATES RAPIDLY IN OUT-OF-CONTROL MANNER. SOMETIMES IT ALSO DECELERATES RAPIDLY, AND LURCHES. *TR
NHTSA complaint: Vehicle speed control

WHENEVER MY CRUISE CONTROL IS SET, VEHICLE CONSISTENTLY OVERCOMPENSATES IN SPEED FLUCTUATIONS. IT IS ALMOST AS IF THE ACCELERATOR PEDDLE GETS STUCK ALL THE WAY DOWN. THIS CAUSES THE VEHICLE TO GO FROM HWY SPEEDS TO EXT
NHTSA complaint: Vehicle speed control

1997 BMW 540I FUSE TO THE FUEL INJECTOR BLEW OUT.***NO ANSWER REQUIRED*** *MR THE VEHICLE WOULD ALL OF A SUDDEN DIE WHEN IN MOTION DUE TO THE BLOWN FUSE(S) TO THE INJECTOR. THE THERMOSTAT TEMPERATURE SENSOR HAD AN IN
NHTSA complaint: Engine and engine cooling

THE RADIATOR NECK BROKE OFF WHILE DRIVING AT HIGHWAY SPEED ON MY 1997 540I. IT IS A COMMON PROBLEM WITH BMW BY ALL ACCOUNTS, OWNERS, TECHNICIANS AND EVEN MY OWN PREVIOUSLY EXPERIENCED IT WITH AN 1988 735I. PLASTIC PARTS
NHTSA complaint: Engine and engine cooling

(1) REPLACED WATER PUMP AND ACCESSORY BELTS. ON A FORUM THAT I READ, MANY SUGGEST REPLACING THE RADIATOR WHEN REPLACING THE WATER PUMP, AS PREVENTIVE MAINTENANCE DUE TO THE RADIATOR'S HIGH AND FREQUENT FAILURE. REPLACE
NHTSA complaint: Engine and engine cooling

The seven scores

Reliability raw	88	excellent
Longevity est.	79	good
Maintenance	61	average
Depreciation	65	good
Performance	68	good
Efficiency	32	below average

How it compares in its class

Percentile ranks against other compact cars in the catalog.

Reliability: better than 57% of compact cars
Longevity: better than 54% of compact cars
Running costs: better than 19% of compact cars
Value retention: better than 64% of compact cars

Which of these numbers are measured

What stands behind each score for this car:

Reliability 88: from NHTSA recalls and complaints. This one is a raw count: we do not have a sales figure for this model, so a high-volume car looks worse here than it should.
Longevity 79: an estimate from powertrain and brand record. No 200,000-mile population exists for a 1997 car yet, so this is a prior, not evidence.
Maintenance 61: repair-cost data where we have it for this model, otherwise a mechanical-complexity estimate from engine size, cylinder count and drivetrain.
Safety: no score. NHTSA crash testing thins out for older vehicles and we would rather show nothing than guess.

Common questions

What goes wrong with the 1997 BMW 540i?

Owners have filed 27 complaints with NHTSA for this model-year, and engine and engine cooling is the most reported area with 11 of them (41%). No recalls are on record for it.

Is the 1997 BMW 540i reliable?

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.

How long will a 1997 BMW 540i last?

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 1997 car has no 200,000-mile population to observe yet, so treat it as a prior rather than evidence.

Should I buy a 1997 BMW 540i?

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.