2021 Bmw 540i problems, complaints & recalls
Most-reported problem areas: Service Brakes (3) · Power Train (3) · Wheels (1)
🧭 Reliability snapshot
Compared against other Bmw 540i model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (6)
Power Train:driveline:driveshaft 2026-08-12 · campaign 26V525000 · 36,823 vehicles
Defect: BMW of North America, LLC (BMW) is recalling certain 2020-2026 840i, 840i xDrive, 2021-2023 540i, 540i xDrive, M550i xDrive, and 2024-2026 750e xDrive vehicles. The connection between the driveshaft and the rear differential may become damaged, possibly resulting in a loss of power to the rear wheels or a vehicle rollaway.
Risk: An unexpected loss of drive power can increase the risk of a crash. In addition, a damaged driveshaft can result in a vehicle rollaway if the parking brake is not applied, increasing the risk of a crash or injury.
Fix: Dealers will inspect the connection between the driveshaft and rear axle differential, and apply adhesive or replace the driveshaft and rear axle differential, as necessary, free of charge. Owner notification letters were mailed October 8, 2026. Owners may contact BMW customer service at 1-800-525-7417. Vehicle Identification Numbers (VINs) involved in this recall will become searchable on NHTSA.gov beginning October 2, 2026.
Seat Belts 2021-07-21 · campaign 21V554000 · 21,537 vehicles
Defect: BMW of North America, LLC (BMW) is recalling certain 2021 2 Series (230i, 230i xDrive, M240i, M240i xDrive), 330e, 330e Xdrive, 4 Series Coupe (430i, 430i xDrive, M440i xDrive) M4 Coupe, M4 Competition Coupe, BMW 4 Series Convertible (430i, M440i), BMW X1 sDrive28i, xDrive28i, 2 Series Gran Coupe (228i, 228i xDrive, M235i xDrive), M2 Competition Coupe, 330i, 330i xDrive, M340i, M340i xDrive, M3, M3 Competition, 530i, 530i xDrive, 540i, 540i xDrive, MINI Hardtop 2 Door (Cooper, CooperS, JCW), X2
Risk: During a crash, a seat belt retractor that does not function as intended increases the risk of injury.
Fix: Dealers will inspect the seat belt retractors (including the seat belts) and, if necessary, replace the retractors, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact BMW customer service at 1-800-525-7417; 1-866-825-1525 (MINI); 1-877-877-3735 (Rolls Royce); and 1-888-270-9371 (Toyota).
Back Over Prevention:software 2021-02-19 · campaign 21V096000 · 13,858 vehicles
Defect: BMW of North America, LLC (BMW) is recalling certain 2019-2021 X3 sDrive30i, X3 xDrive30i, X3 M40i, X3M, X4 xDrive30i, X4 M40i, M550i, X4M, X5 sDrive40i, X5 xDrive40i, X5 xDrive50i, X5M, X5 M50i, X7 xDrive40i, X7 xDrive50i, X7 M50i, Alpina XB7, 330i, 330i xDrive, M340i, M340i xDrive, and 8 Series Coupe, Convertible and Grand Coupe, 840i, 840i xDrive, M850i xDrive, M8, 2020-2021 530e, 530e xDrive, 330e, 330e xDrive, 745Le, 745Le xDrive, X5 xDrive45e, X3 xDrive30e, X6 sDrive40i, X6 xDrive40i, X6 x
Risk: If the driver relies on only the rearview camera image, the missing or reduced rearview image view can increase the risk of a crash or injury.
Fix: BMW will notify owners, and dealers will inspect the rearview camera software and update it if necessary, free of charge. The recall began April 16, 2021. Owners may contact BMW customer service at 1-800-525-7417.
Power Train:driveline:driveshaft 2021-02-03 · campaign 21V046000 · 28 vehicles
Defect: BMW of North America, LLC (BMW) is recalling certain 2020-2021 530i xDrive, 540i xDrive and 2021 740Li xDrive vehicles. The output shafts (left/right) which transfer power from the driveshaft to the rear wheels may break due to a heat treatment error during supplier production.
Risk: A broken output shaft can lead to a loss of drive power or a rollaway condition in a parked vehicle (if the parking brake is not engaged), increasing the risk of a crash.
Fix: BMW will notify owners, and dealers will replace the output shaft(s), free of charge. The recall began March 24, 2021. Owners may contact BMW customer service at 1-800-525-7417.
Electrical System:12v/24v/48v Battery 2020-12-09 · campaign 20V761000 · 812 vehicles
Defect: BMW of North America, LLC (BMW) is recalling certain 2021 M340i xDrive, M440i xDrive Coupe, 530i, 530i xDrive, 540i, 540i xDrive, 740Li, 740Li xDrive, 840i Gran Coupe, 840i xDrive Gran Coupe, X5 sDrive40i, X5 xDrive40i, X6 sDrive40i, X6 xDrive40i, and X7 xDrive40i vehicles. The connection between the 48-Volt battery and the starter-generator may not have been assembled properly, which can cause increased electrical resistance at the connections.
Risk: Increased electrical resistance can increase the risk of a fire.
Fix: BMW will notify owners, and dealers will inspect the connection between the 48-Volt battery and the starter-generator assembly, replacing it if necessary, free of charge. The recall is expected to begin April 12, 2021. Owners may contact BMW customer service at 1-800-525-7417.
Back Over Prevention: Sensing System: Camera 2020-09-30 · campaign 20V598000 · 312 vehicles
Defect: BMW of North America, LLC (BMW) is recalling certain 2020-2021 X3 sDrive 30i, X3 xDrive 30i, X3M 40i, X3 xDrive 30e, X4 xDrive 30i, X4M 40i, 530i, 540i, 540i xDrive, M550i xDrive, M5, 550e, 550e xDrive, and 550e iPerformance vehicles. A small portion of the rearview image may be slightly obscured. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
Risk: If the driver relies on only the rearview camera image, the reduced rearview image view can increase the risk of a crash or injury.
Fix: BMW will notify owners, and dealers will inspect and, if necessary, program the rearview camera with updated software. The recall began November 18, 2020. Owners may contact BMW customer service at 1-800-525-7417.
Service bulletins (167)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-05-06 · B010324 · Warranty Program/Extension
the evap systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.
Exterior Lighting 2024-03-14 · B630418 · Service Bulletin/Repair Instructions
one or more of the led daytime running lights are dim or discolored.
Engine And Engine Cooling 2024-03-04 · B120721 · Service Bulletin/Repair Instructions
check control message (ccm) indicates: (id 213): stop, exercising due care. voltage supply the service engine soon light is on with the following dme fault code: 21b209 - starter alternator / belt for 48v system (osa_riemen_riss): belt betweencombustion engine and starter generator torn and/or o
Visibility:power Window Devices And Controls 2024-01-16 · B510819 · Service Bulletin/Repair Instructions
the basic conditions for initializing the power windows are not met.
Electrical System 2024-01-11 · B611305 · Service Bulletin/Repair Instructions
the electrical system of bmw vehicles has been subject to an ongoing development process over the last few years. this has led to increased demands being placed on the battery. this document covers important information for the dealer on how to handle ã¢ââdischarged batteryã¢ââ complaints.
Steering 2024-01-08 · B360121 · Service Bulletin/Repair Instructions
at low outside temperatures (below 40 degrees f) and slow driving speeds (i.e. when parking, maneuvering)with a large steering angle, the front end can be slightly axially misaligned. this can be felt (jerking)/ heard via an acoustic acknowledgement (clunk) as seen at the 11 second mark of the vide
Showing the 6 most recent of 167 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-09-21 · Power Train“in august 2026, the national highway traffic safety administration announced an active safety recall under campaign number 26v525000 for certain 2021–2023 bmw vehicles experiencing severe driveshaft-to-rear-differential connection failures that result in an immediate loss of motive power and vehicle rollaway risks. shortly after this announcement,…”
2026-07-10 · Power Train“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 elect…”
2026-03-25 · Power Train · 66,700 mi“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…”
2026-02-12 · Service Brakes“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…”
2025-05-05 · Service Brakes“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 v…”
2023-07-24 · Service Brakes · 💥 crash“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) …”
2022-10-21 · Seat Belts · 10,000 mi“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 deale…”
2022-10-06 · Wheels“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 car…”
2022-01-28 · Electrical System:12v/24v/48v Battery“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 eng…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.