BMW dealer noted "clunk on accel" at 57,152 miles on RO #224018 under engine mounts. Dealer quoted $3,463.38 for engine mounts. I declined repair. Clunk on acceleration is still present at 60,700 miles. Same symptom as BMW Service Bulletin SIB 27-02-20 for 4 Series Drive jerking/shuddering from transfer case. Transfer case was serviced by non-BMW shop prior to my ownership (unknown fluid spec). Dealer documentation only notes clunk on accel and engine mounts/alignment. Requesting investigation as this matches known transfer case defect with lifetime fluid claim. Vehicle is just out of 4yr/50k warranty.
The worst 2021 BMW M440I problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine2
- Brakes1
- Driver assistance1
- Electrical1
- Seat belts1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine2
- Brakes1
- Driver assistance1
- Electrical1
- Seat belts1
- Seats1
- Transmission1
Recalls 5
Electrical system: software
- What is wrong
- 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.
- Remedy
- 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.
Recall number 23V584000 · Recall details
Seat belts
- What is wrong
- 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.
- Remedy
- 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).
Recall number 21V554000 · Recall details
Air bags: side/window: thorax
- What is wrong
- BMW of North America, LLC (BMW) is recalling certain 2021 430i and M440i 4 Series Convertible vehicles. In certain side-impact crashes, the head-thorax air bag may not deploy as intended.
- Risk
- An air bag that deploys incorrectly can increase the risk of injury in a crash.
- Remedy
- Dealers will update the software, at no charge. All affected vehicles are still in dealer inventory, and therefore no owner letters will be mailed. The recall began March 9, 2021. Owners may contact BMW customer service at 1‑800‑525‑7417.
Recall number 21V176000 · Recall details
Back over prevention: software
- What is wrong
- 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.
- Remedy
- 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.
Recall number 21V096000 · Recall details
Electrical system: 12v/24v/48v battery
- What is wrong
- 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.
- Remedy
- 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.
Recall number 20V761000 · Recall details
See all 5 recalls for the 2021 BMW M440I
Defect investigations
Pedestrian alert sounds
the federal safety agency received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, the federal safety agency opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified the federal safety agency he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by the federal safety agency regarding the subject matter of the petition.
DP22005
Technical service bulletins for the 2021 BMW M440I 124
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- The EVAP systems purge (vent) valve limited warranty for defects in materials and / or workmanship has...
- An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in...
- The electrical system of BMW vehicles has been subject to an ongoing development process over the last few...
- At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e. when parking,...
- The Central Information Display goes black intermittently due to resets of the Head Unit (HU-H3)....
- Customer states one of the front seats is inoperative
- Functional noises (squealing/honking) when braking shortly before the vehicle comes to a stop
- ?A software error may
- With the introduction of the BMW Remote Software Upgrade, all Service Pack 18 vehicles and partial Service...
- BMW AG has issued a Delivery Stop effective June 6, 2023 on certain Model Year 2023
What 2021 BMW M440I owners say
Most recent owner complaints, unedited.
The engine starter motor system failed, specifically involving an intermittent no-start condition related to a pinion starter line break / internal component defect. The vehicle and all original mechanical components are fully intact and available for professional inspection upon request. The engine starter motor system failed, specifically involving an intermittent no-start condition related to a pinion starter line break / internal component defect. The vehicle and all original mechanical components are fully intact and available for professional inspection upon request. The vehicle is currently experiencing these active symptoms. The vehicle experiences sudden, unpredictable intermittent no-start scenarios. Being unable to dependably start or restart the engine creates a severe risk of stranded occupants in hazardous traffic scenarios, remote areas, or extreme weather conditions. Furthermore, this failure pattern matches identical 2026 BMW starter recalls where internal mechanical wear creates a severe overheating condition and an elevated vehicle fire risk, directly threatening passenger safety. No, the component has not yet been formally inspected by the manufacturer, police, or insurance representatives since it has not resulted in an active collision or fire. It has only been scanned for diagnostic error codes. The symptoms are intermittent no-start events that happen unexpectedly from a complete stop. Diagnostic system scans revealed software errors specifically pointing to fault code XXX indicating a line break in the pinion starter. These symptoms first began appearing intermittently earlier this year. VIN: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
I am seeing a lot of concerns regarding the seatbelt extenders, the buckle end pretensioner, seat wiring harness and the yellow box connectors that are where the main power and air bag SRS connections sit under the drivers seat. The seat harnesses are catching in the sliding track mechanism during forward and backward adjustments, isn't that a manufacturer error as the harnesses are only kept in place by plastic routing clips, which may or may not be there. I am just wondering if this should be looked at on the 2021 440i convertibles? I love the car but worry this is a safety issue forums are mentioning. Car alarms 1m-4am is that software updates, went on for four days in June.
The car basically blew up on the highway at rush hour. BMW knows of this issue with this model and has some of their other models under a recall for this very thing. I have a service action from BMW saying that the water pump assembly needs to be fixed before this very problem occurs but for some reason even though our model is on the service report it isn't on the recall list nor was this part replaced as instructed even though the vehicle has always been service at a BMW dealership. It was very dangerous as their were flames and burning hot coolant and shards of metal shooting everywhere as my son was on the highway being passed by big trucks. Weren't going too fast as we were just getting on the highway merging in which was also dangerous as everyone else was going fast. BMW has given me the runaround from department to department on this even though they all seem to agree that mine should be part of the recall or already fixed which was obvious because the new part is made of a different material than the old original part. On their service action my car is the G22 series clearly listed
Vehicle brakes malfunctioned.
Brought a New 2021BMW M440 only 5 months ago, garage kept, has less than 4,000 miles. I woke up with a 10” crack across windshield @ 6:30 am on 9/28/2021with popping sounds. Windshield was shown on camera the night prior with no damage and shows no apparent evidence of ever getting hit. No scratches or chips. On 9/29/21 @ 7am car had more popping sounds and now crack has reached 15” - increased. By 5 “ after measuring. Dealer inspected 9/28/2021 and only states windshield has to be replaced and only stated the changed in temp of 80 degrees and dropping to 60 degrees @ night could have been the factor for cracking.
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Questions about the 2021 BMW M440I
Is the 2021 BMW M440I reliable?
Owners have filed 6 complaints about the 2021 BMW M440I, 2.0 times a typical M440I model year.
What is the most common problem with the 2021 BMW M440I?
Engine and cooling, with 2 complaints. Next is brakes (1).
How many recalls does the 2021 BMW M440I have?
5 recalls, covering electrical system, seat belts and air bags.
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