2021 BMW 540I Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2021 BMW 540I, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Brakes325.0%
- Powertrain (other)216.7%
- Electrical216.7%
- Other / unspecified18.3%
- Seat belts18.3%
- Steering18.3%
- Driver assistance18.3%
- Engine18.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
In November 2025 my breaks quit working. I had AAA haul my car to a repair shop. They ran the codes on the car and found that it was related to a recall on 2021 BMW 540i's for the oil vacuum pump assembly, pan and gasket. I then had it towed to BMW and found out that my vin was not in the recall. BMW quoted me $4587 to repair this on a car with 45,000 miles. I then had it towed to a repair shop that replaced the oil vacuum pump assembly, oil pan, gasket and bolts for about $3700. I think that my vin should have been included in the recall. It was a obviously a common problem with my model and I should not have to pay this much on a car with 45,000 miles. I also had to pay $283.81 for BMW to diagnose it.
We notice the lose of braking power right after we started the car on 4/30 morning. The car was totally fine before that. took it to the BMW dealer they said the problem is "Vacuum/oil pump failing internally. fault for brake booster pressure switch, no brake boost" I find that there is a recall for the exact problem but it doesn't include my vehicle The "Part 573 Safety Recall Report 21V-598" stated that when It does happen it will cause damage to the oil/vacuum pump. I think recall 21V-598 should include my vehicle
Too few reports in this category for a page of its own — they appear in the full complaint list.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
Starter engine failure. Car failed to start multiple times. Major safety hazard that can cause a short circuit, melt wiring harnesses, and spark an engine bay fire posing an immediate threat to life. Problem was inspected and confirmed by a dealer. Multiple waring lamps and messages appeared. Dealer report stated: STARTER MOTOR FAULTY. ENGINE ELECTRICAL SYSTEM CONCERN: C/S: REPEAT START ATTEMPT INTERMITTEN WARNING LIGHTS. Please issue recall for the safety of all drivers.
The contact owns a 2021 BMW 540I. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. There was an abnormal sound coming from the vehicle before the vehicle lost motive power. No warning lights were illuminated. The contact stated that the vehicle failed to respond while in drive(D) or reverse(R). The vehicle was towed to the dealer, where it was diagnosed with a driveshaft failure. The contact was informed that the driveshaft needed to be replaced. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 21V046000 (Power Train); however, the VIN was not associated with the recall. The manufacturer was made aware of the failure. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 66,700.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
Starter engine failure. Car failed to start multiple times. Major safety hazard that can cause a short circuit, melt wiring harnesses, and spark an engine bay fire posing an immediate threat to life. Problem was inspected and confirmed by a dealer. Multiple waring lamps and messages appeared. Dealer report stated: STARTER MOTOR FAULTY. ENGINE ELECTRICAL SYSTEM CONCERN: C/S: REPEAT START ATTEMPT INTERMITTEN WARNING LIGHTS. Please issue recall for the safety of all drivers.
2021 BMW 540I. CONSUMER WRITES IN REGARDS TO MULTIPLE DEFECTS DUE TO BATTERY MANAGEMENT ISSUE. THE CONSUMER STATED THE VEHICLE HAS EXPERIENCED MULITPLE OCCASIONS OF FAILURES WITH THE BREAKING SYSTEM. THE DRIVER HAD TO PRESS THE PEDAL TO THE FLOOR IN ORDER TO STOP THE VEHICLE. THE EMERGENCY BRAKING SYSTEM ENGAGED WITHOUT WARNING, THE AUTOSTART ENGAGED INDEPENDTLY, AND LIGHTING/SPEAKER/SUNROOF MALFUNCTION.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Other / unspecified
Reports whose component NHTSA recorded as unknown, or that do not map to one of the categories above.
From owner reports, verbatim
Intermittent vibration at highway speeds. Brought to the BMW dealership and they stated the right front wheel was out of round. I never hit a pothole or anything that would cause damage. The dealer "repaired" the wheel, but the problem still exists. Brought the vehicle back and am now told that BMW has started offering non-run flat tires on new cars. I feel that the run flat tires coupled with the low-profile wheels could be the issue. Also, feel that the wheels are poorly made and are prone to being warped.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Seat belts
Reports naming seat belts, buckles, retractors and pretensioners.
From owner reports, verbatim
The contact owns a 2021 BMW 540I. The contact stated that on multiple occasions, the front and rear passenger’s and driver’s side seat belts failed to detach after being connected. The contact stated that he forced the rear passenger’s side seat belt to detach with a screwdriver. No warning lights was illuminated. The vehicle was taken to the dealer where the dealer stated that candy was lodged in the buckle. The contact stated that the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and a case was opened. The failure mileage was approximately 10,000.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
Intermittent vibration at highway speeds. Brought to the BMW dealership and they stated the right front wheel was out of round. I never hit a pothole or anything that would cause damage. The dealer "repaired" the wheel, but the problem still exists. Brought the vehicle back and am now told that BMW has started offering non-run flat tires on new cars. I feel that the run flat tires coupled with the low-profile wheels could be the issue. Also, feel that the wheels are poorly made and are prone to being warped.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
Unintended car acceleration, with complete brake failure. No software warning icons in dash, no collision avoidance or ABS triggered even though car so equipped. Crashed into rear end of stationery vehicle,. [XXX] , MN police were called. Incident report # attached. (1st image) Western National Insurance Co. notified.Claim # attached (2nd image) Car will be inspected @ BMW dealership in Bloomington, MN 7/25/23. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
Starter engine failure. Car failed to start multiple times. Major safety hazard that can cause a short circuit, melt wiring harnesses, and spark an engine bay fire posing an immediate threat to life. Problem was inspected and confirmed by a dealer. Multiple waring lamps and messages appeared. Dealer report stated: STARTER MOTOR FAULTY. ENGINE ELECTRICAL SYSTEM CONCERN: C/S: REPEAT START ATTEMPT INTERMITTEN WARNING LIGHTS. Please issue recall for the safety of all drivers.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .