1997 BMW 540I Engine cooling Problems
- Complaints
- 13about this part
- Share
- 48%of 27 total for the year
- Median mileage
- 73,280miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 13 complaints about the engine cooling of the 1997 BMW 540I, 48% of the 27 complaints for this model year. Where a mileage was given, the median is 73,280 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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 on the radiator is unacceptable, dangerous and costly. This has been a problem for more than 10 years on these expensive luxury vehicles with no resolution by Bmw.”
NHTSA complaint #10116922, filed 2005-04, 127,075 miles“My 1997 Bmw 540I 6-speed had a radiator failure at 77,500 miles. The plastic radiator connection point for the top hose snapped off. This appears to be a well know issue after speaking with Bmw service techs and searching Bmw internet sites. I believe that the manufacture should take care of this issue.”
NHTSA complaint #10036982, filed 2003-09, 77,500 miles“(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 the radiator as preventive maintenance?!? I would rather not. A radiator is not an oil or air filter. (2) upper neck on the radiator broke and released more than a gallon of coolant, in less than 50 feet, in the form of liquid and steam. The steam obscured vision on the drivers side of the vehicle. Luckily I was making a right-hand turn into a parking lot. …”
NHTSA complaint #10100611, filed 2004-11, 55,000 miles“1997 Bmw 540I fuse to the fuel injector blew out.***no answer required*** 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 internal short which caused the wire to melt and blew the fuse. The sunroof was inoperative due to the rail lift pieces being broken. The wiper blades were not cleaning the windows properly.”
NHTSA complaint #10130203, filed 2005-07, 53,777 miles“I own a 1997 Bmw 540I. Radiator broke at plastic attachment point. Coolant leaked all over the windshield and engine. This seems to be a well known defect among owners of this car due to the plastic attachment point at the junction of the hose and the radiator.”
NHTSA complaint #10023565, filed 2003-06, 71,560 milesRelated service bulletins
- 10142928Dec 1, 2017SERVICE ACTION: PROGRAM DME (FOR O2 SENSORS): Due to DME software error, the following oxygen sensors plausibility fault codes may be stored in DME 5.2.1 control module:
Engine cooling: other model years
Other parts of the 1997 BMW 540I
3 complaintsOther or unknown
2 complaintsSeat belts
2 complaintsSuspension
2 complaintsVehicle speed control
2 complaintsAir bags
1 complaintsBrakes
1 complaintsSeats
1 complaintsTires
1 complaintsTransmission and drivetrain
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 1997 BMW 540I
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology