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2021 BMW 3 Series problems, recalls and owner complaints
What the 2021 BMW 3 Series has been recalled for, how often it fails the UK MOT and what owners report, from official government data. Updated October 25, 2026.
- 8safety recalls
- 44owner complaints
- 1crash report
- 3fire reports
- 9%fail the UK MOT
44 complaints, against an average of 124 for the other 13 BMW 3 Series model years.
Every BMW 3 Series model year with its number of owner complaints. Pick a year to compare.
What goes wrong with the 2021 BMW 3 Series?
The components named most often in the 44 owner complaints. One complaint can name several, so the shares can add up to more than 100%.
What symptoms do 2021 BMW 3 Series owners describe?
Found by reading the text of all 44 owner complaints. Tap a symptom for the answer, a real owner quote and any related recall.
Has the 2021 BMW 3 Series been recalled?
8 U.S. safety recalls. Repairs are free at a franchised dealer; some are done over the air.
Seat Belts BMW of North America, LLC (BMW) is recalling certain 2019-2022 330i, 330i xDrive, M340i, 2022 430i Coupe, 2021-2022 430i, M440i Convertible, and 2020-2022 228i xDrive Gran Coupe vehicles. The receiver audio module control unit software may fail to properly generate audible seat belt warnings to the driver to fasten their seat belt. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
Risk: An audible chime that does not properly alert the driver to fasten their seat belt increases the risk of injury in a crash.
Fix: Dealers will update the receiver audio module software, free of charge. Owner notification letters were mailed October 12, 2023. Owners may contact BMW customer service at 1-800-525-7417.
Seats BMW of North America, LLC (BMW) is recalling certain 2019-2021 330i, 330i xDrive, M340i xDrive, 2020-2021 X3 sDrive30i, X3 xDrive30i, X3 M40i, X3M, 2021 X3 xDrive30e, X4 xDrive30i, and X4M vehicles. The seat frame may not have been welded properly to the seat rails.
Risk: An improperly welded seat frame may not properly restrain the occupant during a crash, increasing the risk of injury.
Fix: Dealers will replace the seat frame and back rest, free of charge. Owner notification letters were mailed May 22, 2023. Owners may contact BMW customer service at 1-800-525-7417.
Seat Belts 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 sDrive28i, X2 xDrive28i, X2 M35i, Z4 sDrive30i, Z4 M40i, MINI Hardtop 2 Door (Cooper SE), MINI Convertible (Cooper, Cooper S, JCW), MINI Clubman (Cooper S, Cooper S All4, JCW), MINI Countryman (Cooper, Cooper All4, Cooper S, Cooper S All4, JCW All4), Rolls Royce Ghost, MINI Countryman (Cooper S E All4), Rolls Royce Phantom, Rolls Royce Cullinan, and Toyota Supra vehicles. The passenger seat belt Automatic Locking Retractor (ALR) may deactivate early, before the webbing fully retracts. As such, these assemblies fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
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).
Seat Belts: Front: Buckle Assembly BMW of North America, LLC (BMW) is recalling certain 2021 330i, 330i xDrive, M340i, M3, and 330e xDrive vehicles. The bolt securing the seat belt assembly to the frame was not tightened to specification.
Risk: An improperly installed seat belt assembly may not restrain an occupant as expected, increasing the risk of injury.
Fix: BMW will notify owners, and dealers will inspect the front seat belt buckle assembly connection and, if necessary, replace it, free of charge. Owner notification letters were mailed on June 25, 2021. Owners may contact BMW customer service at 1-800-525-7417.
Back Over Prevention: Sensing System: Camera 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 xDrive50i, X6 M50i, X6M, 530i, 530i xDrive, 540i, 540i xDrive, M550i xDrive, M5, 740i, 740Li, 740Li xDrive, M760i Drive, M760Li xDrive, 750Li xDrive Alpina, Alpina B7 xDrive, and 2021 4 Series Coupe 430i, 430i xDrive, M440i xDrive vehicles. When shifting into Reverse, a small portion of the rearview image may be obscured, or the screen may not illuminate. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."
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.
Electrical System: 12v/24v/48v Battery 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.
Electrical System: Propulsion System: Traction Battery BMW of North America, LLC (BMW) is recalling certain 2020-2021 530e, 530e xDrive, 530e iPerformance and X3 xDrive30e and MINI Cooper Countryman All4 SE, 2020 BMW i8, and 2021 330e, 330e xDrive, 745Le xDrive and X5 xDrive45e vehicles. Debris may have entered one or more of the hybrid battery cells during their production.
Risk: The debris could result in a short-circuit, increasing the risk of fire or injury.
Fix: BMW will inspect and, if necessary, replace the battery module free of charge. The remedy is currently being developed. Until the remedy is completed, drivers are instructed to not charge their vehicles. Drivers are instructed to not drive in manual mode, sport mode, and to not use the shift paddles. Owners were notified of the safety risk October 23, 2020. The recall began November 24, 2020. Owners may contact BMW customer service at 1-800-525-7417.
Electrical System: 12v/24v/48v Battery BMW of North America, LLC (BMW) is recalling certain 2021 330e and X5 xDrive45e, 2020-2021 X3 xDrive30e, and 2020 MINI Countryman SE ALL4 vehicles. Loose welding beads may form a conductive path between the hybrid battery cells which could lead to a short-circuit.
Risk: A short-circuited hybrid battery may increase the risk of a fire.
Fix: BMW will notify owners, and dealers will inspect and, if necessary, replace the battery modules, free of charge. BMW issued owners an interim notification on October 16, 2020. Although potentially affected BMW owners received interim owner notification letters, all potentially affected BMW owner vehicles have been remedied; therefore, BMW Final owner notification letters will not be necessary. Owners may contact BMW customer service at 1-800-525-7417.
Is the 2021 BMW 3 Series recalled in the UK or Europe?
Recalls issued by the UK's DVSA and through the EU's Safety Gate system that cover this model and build period. European models can differ from U.S. ones, and "years estimated" means the recall gave no build dates, so confirm your own car with your registration or VIN.
UK DVSAReplace the Engine Starter Motor
Risk: The Safety Recall relates to the engine starter motor. The fault relates to the RSW22 starter RWT (reinforced water tightness). It was found that with RWT starters an increased abrasion of the magnetic contact can cause the growth of deposits at the lowest point of the relay interior. This in turn may increase the relay contact resistance resulting in false starts or even causing short circuits and possibly a thermal reaction. In case of a short circuit the possibility of a thermal event cannot be excluded. This may happen while attempting to start the vehicle or while driving due to vibrations causing a short circuit due to moving deposits.
Fix: On the affected vehicles the starter motor will be replaced with a variant by another supplier with a different design. Until the repair has been completed it is recommended to not leave the vehicle running unattended after starting the engine.
UK DVSAReplace the Engine Starter Motor
Risk: For affected vehicles there is a concern involving water ingress and corrosion to the starter motor for where a short circuit cannot be ruled out. It is strongly recommended to park the vehicle outdoors and not in the immediate vicinity of buildings until the repair has been carried out.
Fix: Replacement of the starter motor.
UK DVSAOn certain vehicles the Body Domain Controller (BDC) control unit may have an incorrect setting applied to it.
Risk: On certain vehicles the Body Domain Controller (BDC) control unit may have an incorrect setting applied to it.
Fix: Conduct a check of the settings and if necessary perform a reset on the BDC control unit.
UK DVSAManufacturing defect with winding of cell-internal films for high voltage battery
Risk: The safety recall relates to a problem with a cell module within the high-voltage battery.
Fix: Replace the affected high-voltage cell module.
UK DVSAUndetected EGR System leaks may cause thermal activity in the intake manifold
Risk: Undetected EGR System leaks may cause thermal activity in the intake manifold.
Fix: The engine management control unit (DDE) will be programmed with improved software incorporating the latest OBD functionality.
UK DVSAThe exhaust gas recirculation cooler may leak over time and cause thermal incident
Risk: The Exhaust Gas Recirculation cooler may leak over time and cause thermal incident.
Fix: On the affected vehicles the EGR cooler module will be replaced.
UK DVSAThe screw connection of the front seat belt buckle assembly to the seat frame may not be tightened properly
Risk: The screw connection of the front seat belt buckle assembly to the seat frame may not be tightened properly.
Fix: On affected vehicles the screw connection of the lower belt of the front seats will be checked and if necessary reworked.
UK DVSAAffected vehicles may be fitted with brake discs which are not to specification
Risk: Affected vehicles may be fitted with brake discs which were not produced according to the specifications
Fix: On the affected vehicles the brake discs will be checked and if necessary replaced
UK DVSAThe battery cables on the 48v starter generator may not have been sufficiently secured during production
Risk: The battery cables on the 48V starter generator may not have been sufficiently secured during the production process.
Fix: Check the screw connection of the 48V positive / negative battery cables on the starter generator and rework if necessary.
UK DVSARemaining particles in the cells of the high voltage battery can cause a short circuit
Risk: A possibility of impurities contained in the HV batteries may cause short circuit.
Fix: Testing of battery charge cycles and replacement of the HV cells where necessary.
UK DVSARemaining particles in the cells of the high voltage battery can cause a short circuit
Risk: In very rare cases welding beads were not always completely removed in the cleaning process during battery production.
Fix: Test and replace the High Voltage batteries if affected.
EU Safety GateWater may enter the starter motor and cause damage.As a result, the engine may no longer start, or the starter motor may short-circuit or remain continuously activated. This could cause local overheating of the starter motor or thermal overload of surrounding components and lead to a vehicle fire, including when the ignition is switched off.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: 31/08/2026
EU Safety GateThe RSW22 starter with reinforced water tightness (RWT) may experience increased abrasion of the magnetic contact, causing deposits to…The RSW22 starter with reinforced water tightness (RWT) may experience increased abrasion of the magnetic contact, causing deposits to build up at the lowest point inside the relay. These deposits may increase relay contact resistance, leading to starting failures or short circuits. If a short circuit occurs, either when attempting to start the vehicle or while driving due to vibration-related movement of the deposits, it could cause a thermal event and increase the risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: 07/07/2026
EU Safety GateThe engine starter’s electrical contacts may overheat and cause the vehicle to start improperly.Continued starting attempts can intensify the overheating and ignite surrounding components, potentially leading to a vehicle fire while driving or shortly after parking.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateWater may come into contact with the starter relay and gradually cause corrosion.This could affect the electrical connection inside the relay and make the engine difficult to start. It may also result in a short circuit and could cause the starter to overheat leading to a fire when the vehicle is in motion or when it is parked with the ignition off.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe driver's and/or passenger's seat could break the frame rail that connects the seat to the guide rails on the vehicle floor.The stability of the seats may be affected, increasing the risk of injury in case of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe abdominal strap (safety-belt buckle) may not have been correctly screwed.This could affect the restraining capacity of the safety-belt and increase the risk of injury in the event of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: 21/04/2021
EU Safety GateA short circuit in the high-voltage battery could occur during initial charging due to a particle in the form of a welding bead.This may trigger a chain reaction in the battery, increasing the risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
How often does the 2021 BMW 3 Series fail its MOT?
Why they failed: the share of failed tests with at least one fault in each area (a test can fail on several). Cars first registered in 2021, tested in Great Britain in 2023; first registration is usually, but not always, the model year. Source: DVSA anonymised MOT tests and results, Open Government Licence v3.0.
What do 2021 BMW 3 Series owners report?
12 of the 44 complaints, the most recent for the most-reported components, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
I am getting error code 21A50A and 216115 which Starter Overheating that can cause fire. Similar error code were coming on other cars and BMW have recalled it the recall number is 26V056. I ask BMW and NHTSA to include 330E in this recall as 330E is similar to 330I. 330I and 330E uses same parts and similar design and excluding the 330E from this recall doesn't make sense.
The contact owns a 2021 BMW 330I. The contact stated that while entering the vehicle, there was an audible alert heard, and a red air bag light was displayed on the instrument panel. The vehicle was taken to the dealer, where it was diagnosed with a failure in the driver’s side knee air bags. The air bags were replaced, and the airbag module was reprogrammed. The manufacturer was notified of the failure. The failure mileage was 30,868.
I have been smelling a burning odor in the vehicle for almost a year which the dealership and an independent shop had not been able to diagnose. The car was recently throwing Drivetrain Error codes which prompted a visit to the dealership. They found that the 48v battery and negative cable are burnt and quoted $5680 to replace the battery and cables. After investigating I found that there were recalls for this issue on other BMWs, including the same year and model of my vehicle, but my VIN is not pulling up a recall. The issue is a fire risk and a very expensive repair that should be covered…
The BMW B58TU oil pump thermoplastic component issue that can cause catastrophic failure to the engine. The the gen 1 oil pump was made from plastic and after issues were discovered, they switched to metal oil pumps. However this known issue is something that BMW has not addressed in the models 2019-2021 that came with the inferior oil pump.
Here’s a strong version that sounds frustrated but still credible and harder to dismiss: I’ve owned many vehicles over the years, and this BMW has been, without question, the most problematic car I’ve ever had. The list of issues has been absurd for a vehicle in this price range and from a brand that markets itself as a premium luxury manufacturer. The sunroof failed, I’ve had multiple tire blowouts under normal driving conditions, the drive bar/suspension was bent from what should have been a routine road bump, the engine oil housing/component failed, and now I’m dealing with coolant system…
The contact owned a 2021 BMW 330i. The contact received notification of NHTSA Campaign Number: 26V056000 (Electrical System); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The contact stated that while driving approximately 45 MPH, there was smoke coming from under the passenger side fender. The contact entered a nearby parking lot off the highway when the vehicle caught fire. The contact was able to exit the vehicle, and someone inside a nearby building extinguished the fire with…
1. The engine starter motor (specifically the pinion starter) has failed, and the auxiliary battery is also showing reduced capacity (only a portion of its 660 cold cranking amps). The vehicle is currently at a service center where the technician has diagnosed these issues. The components should be available for inspection upon request, as they have not yet been replaced. 2. The failure of the starter motor and battery primarily affects the vehicle's ability to start. While this could potentially strand you in an unsafe location, the information provided does not indicate any specific safety…
I bought my car in 2023 with 12,000 miles. I currently have 43,000 on it. I don’t drive it hard and have always had the maintenance done. I had my rear brakes replaced today at BMW and I was told my engine mounts have failed and need to be fixed asap. Was given a quote of 3000.00. My warranty expired literally 2 months ago. I’m told it’s dangerous to drive but how does this happen? Everything I read says they should be lasting 60,000-100,000 miles at least.
My car has ver been wrecked or received any damage to any part of it. While driving to work the following warning popped up on screen. RESTRAINT SYSTEM WARNING, functionality of the airbags, seatbelt tensions, belt force limits reduced.
Going into a parking spot. Applied brakes, then the car did not brake, then it accelerated hitting a Jeep and finally stopped when the driver side front hit a parking barrier and then the air bags deployed. Sudden unintended acceleration was the cause of this accident. Car was totaled.
On 5/22/24 had a catastrophic failure of the Electric Motor Electronics and 12v Battery. I have requested that the BMW Serice Assistant provide me with all affected parts for inspection. Shutdown of the vehicle high voltage system could result in a crash. When this part fails along with the 12v battery you lose control of all vehicle electronics (steering, braking, electrical power, and propulsion). Yes, there was a previous voluntary recall campaign 19V-599s Service Information Bulletin (Revision 2) which replaced SI B12 27 19 dated October 2019 by BMW for this device. The vehicle and…
In Buford GA at the corner of Elm Tree Terrace and Buford Dam road, I was waiting for the light to turn on a decline. It is important to note that the car was driving in all-electric mode on a full charge. Once the light turned green I stepped on the accelerator to go and the car stalled. I believe the transmission slipped. The gears caught at high torque and jolted the car involuntarily forward. I didn't notice it at first but after a couple of sleepless nights with shoulder pain: I got an MRI and was found to have a torn rotator cuff. It is difficult to associate the injury as it is hard to…
2021 BMW 3 Series: questions owners ask
Is the 2021 BMW 3 Series reliable?
NHTSA data alone cannot rate reliability, but it shows what owners reported. Owners filed 44 complaints with NHTSA about the 2021 BMW 3 Series; the most common categories were engine (18, 40.9%), electrical system (17, 38.6%), power train (6, 13.6%). There are 8 safety recalls. 1 complaint mentions a crash, 3 mention a fire, 2 injuries were reported.
What are the most common problems with the 2021 BMW 3 Series?
Across 44 owner complaints filed with NHTSA, the categories mentioned most often are engine (40.9% of complaints), electrical system (38.6% of complaints), power train (13.6% of complaints), air bags (9.1% of complaints), forward collision avoidance (6.8% of complaints). One complaint can name several components.
Does the 2021 BMW 3 Series have any recalls?
Yes. NHTSA lists 8 recalls for the 2021 BMW 3 Series; the most recent (campaign 23V584000, 2023-08-16) concerns Seat Belts. Recall repairs are free at a franchised dealer; check your VIN at nhtsa.gov/recalls.
Can the sunroof on the 2021 BMW 3 Series shatter or fail?
4 of the 44 owner complaints NHTSA has on file for the 2021 BMW 3 Series (9.1%) describe the sunroof or panoramic roof shattering, exploding or failing. One owner wrote: "While I was driving down the highway, sunroof has exploded without any apparent reason. I really didn’t realize what had happened at first, all I heard was a loud bang which could’ve lead to distraction and cause an accident." (NHTSA complaint 11509033, February 2023). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Why does my 2021 BMW 3 Series smell of burning or smoke?
4 of the 44 owner complaints NHTSA has on file for the 2021 BMW 3 Series (9.1%) describe a burning smell or smoke. One owner wrote: "I have been smelling a burning odor in the vehicle for almost a year which the dealership and an independent shop had not been able to diagnose. The car was recently throwing Drivetrain Error codes which prompted a visit to the dealership." (NHTSA complaint 11747887, July 2026). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Have any 2021 BMW 3 Series vehicles caught fire?
3 of the 44 owner complaints NHTSA has on file for the 2021 BMW 3 Series (6.8%) describe the car catching fire or melting wiring. One owner wrote: "I am submitting a claim pertaining to NHTSA Recall Number 25V636000 which pertains to a engine starter issue that can result in fire. This recall was reported first on September 23, 2025 and has been gone without a remedy." (NHTSA complaint 11732736, April 2026). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Check your own 3 Series
Counts are a starting point, not a verdict: popular models collect more complaints because more of them are on the road, and NHTSA does not verify individual reports. To see whether a recall is still open on your car, enter your VIN at nhtsa.gov/recalls (U.S.) or your registration at check-vehicle-recalls.service.gov.uk (UK). Had a safety problem? Report it to NHTSA; complaints are what trigger investigations and recalls.
Data: NHTSA Office of Defects Investigation recall and complaint databases (public domain), DVSA anonymised MOT results (Open Government Licence v3.0), DVSA vehicle recalls (Open Government Licence v3.0), EU Safety Gate alerts (© European Union), retrieved October 25, 2026. Model year 2021 only; combines NHTSA's entries for 3 SERIES, 330E and M340I.