This page covers 2 recalls, 29 owner complaints and EPA fuel economy for the 2018 BMW 540i.
24 mpg combined
9.8 L/100km
Midsize Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted.
The dominant pattern in 2018 BMW 540i complaints centers on the restraint system, specifically the seats, airbags, and seatbelts working as a connected group. Owners frequently report a "Passenger Restraint System Malfunction" warning appearing on the instrument panel and main screen, sometimes with the airbag-disabled indicator lit alongside it. The warning shows up both with and without a passenger seated, and in many cases the seatbelt itself appears to be functioning normally. Owners describe uncertainty about whether the fault originates in the passenger seat's occupant sensor, the seatbelt buckle, or the wiring. Seat belt complaints follow a similar pattern, with intermittent warnings rather than a consistent mechanical failure. A smaller number of owners report tire pressure monitoring alerts that return after a successful reset.
29
Total Complaints
3
Crash-Related
2
With Injuries
By System
The 2018 BMW 540i has 2 recalls, the more serious being an engine stall that can occur without warning and raise the risk of a crash. The crankshaft sensor may not correctly read engine rotation data, causing the engine to cut out while driving. The second recall covers the backup camera, which can fail to display an image when reversing, reducing visibility behind the vehicle and raising the risk of striking an object or person.
At a glance
What can fail
The backup camera display can be adjusted to hide the rear view image, and the vehicle remembers this setting when put in reverse, leaving the screen blank.
What the fix does
Dealers will update the backup camera software at no cost to restore the display functionality.
Summarized — see the official notice for exact wording, dates, and contacts.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
At a glance
What can fail
The crankshaft sensor has incorrect firmware that prevents it from reading the crankshaft reluctor ring properly, which can cause the engine to stall.
What the fix does
Dealers will replace the crankshaft sensor at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
