Most common 1998 BMW 540i problems
Share of the 26 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
BMW 540i complaints by model year
Best 540i years: 2020. Years to avoid: 2018, 2017, 1998, 1997, 2000. Compare all years →
1998 BMW 540i recalls (1)
Power train › Driveline › Differential unit
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.
Remedy: Dealers will replace the entire differential assembly.
What 1998 BMW 540i owners say
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 of the road. Having known others that this has happened to, I first checked the radiator and sure enough, there was a large crack down the side of the housing. I had the car towed home and purchased a new radiator from BMW of seattle the following morning. The new radiator was about $200, a few hours of my own labor and a few more hours detailing the engine pay and headlights which had radiator fluid all over them. Also from the experience of others who own e39 BMW 540s, I fully expect this to happen again in the next 50K miles. I also expect the expansion tank to go within the next few months.
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 life than many). Causes loss of vision due to amount of steam released. Less experienced driver May have difficulty controlling vehicle to get to side of road quickly to shut down. No way to predict the failure. Same issue with expansion tank. Both failures are on plastic parts.
1998 BMW 540i engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 4.4L 8-cyl | 5-speed automatic | RWD | 16 / 22 / 18 |
| 4.4L 8-cyl | 6-speed manual | RWD | 14 / 22 / 16 |
EPA ratings. Class: Compact car.
Frequently asked questions
Is the 1998 BMW 540i a good car?
Based on 26 owner complaints filed with NHTSA, the 1998 540i rates avoid: 2.3× as many complaints as a typical year of the 540i at the same age. It is one of the 540i years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 1998 BMW 540i?
The engine & cooling — 16 complaints, 62% of all complaints for this model year, most often about cooling system › radiator assembly. Next are the locks & latches (2) and body & structure (2).
How many recalls does the 1998 BMW 540i have?
There is 1 recall for the 1998 BMW 540i, the most recent from June 22, 1998 (differential unit). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the BMW 540i?
The best years by complaints, compared at the same age, are 2020. Years to avoid or approach with caution: 2018, 2017, 1998, 1997 and 2000. See the full BMW 540i years comparison.
At what mileage do 1998 BMW 540i problems happen?
The median mileage reported in complaints is about 51,000 miles; 43% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.