| Variant | Engine | Drivetrain | Transmission | City | Highway | Combined | EV Range | Est. Annual Fuel Cost |
| 430i Coupe | 2L 4-Cyl | Rear-Wheel Drive | Automatic (S8) | 26 MPG | 34 MPG | 29 MPG | — | $2,600 / yr |
| 430i xDrive Coupe | 2L 4-Cyl | All-Wheel Drive | Automatic (S8) | 24 MPG | 33 MPG | 27 MPG | — | $2,800 / yr |
| 430i Convertible | 2L 4-Cyl | Rear-Wheel Drive | Automatic (S8) | 24 MPG | 33 MPG | 27 MPG | — | $2,800 / yr |
| M440i Convertible Hybrid | 3L 6-Cyl | Rear-Wheel Drive | Automatic (S8) | 23 MPG | 31 MPG | 26 MPG | — | $2,900 / yr |
| M440i xDrive Coupe Hybrid | 3L 6-Cyl | All-Wheel Drive | Automatic (S8) | 22 MPG | 31 MPG | 25 MPG | — | $3,050 / yr |
Data Boundary Note: EPA specifications are shown by certified vehicle configuration. NHTSA complaints and recall totals are recorded at the model-year level across all configurations.
| Tested Drivetrain / Cab Variant | Overall Rating | Frontal Crash | Side Crash | Rollover Rating | Rollover Risk |
| Convertible C AWD | Not Rated | Not Rated | Not Rated | Not Rated | — |
| 2 DR AWD | Not Rated | Not Rated | Not Rated | Not Rated | — |
| Convertible C RWD | Not Rated | Not Rated | Not Rated | Not Rated | — |
| 2 DR RWD | Not Rated | Not Rated | Not Rated | Not Rated | — |
Active Driver Assistance Systems (NHTSA Recorded): Forward Collision Warning (FCW) is documented as Standard and Lane Departure Warning (LDW) is documented as Optional in official NHTSA records for tested 2021 BMW 4 Series models.
View complete 2021 BMW 4 Series crash test & safety breakdown →
Top Reported Problem Categories
Ranked by total consumer complaint submissions recorded by NHTSA
Data Attribution & Context: Complaints are self-reported by vehicle owners to NHTSA and represent unverified consumer submissions. Complaint volume does not equal a statistically controlled failure rate and is not adjusted for total vehicles sold or cumulative mileage driven.
View all 2021 BMW 4 Series problems & component breakdown (8 categories) →
Affected Component: ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY
Defect Summary: BMW of North America, LLC (BMW) is recalling certain 2019-2021 BMW 330i, 2019-2022 BMW Z4, 2020-2022 BMW 530i, X3, X4, Toyota Supra, 2021-2022 BMW 430i, 430i Convertible, and 2022 BMW 230i vehicles. The engine starter relay may corrode, causing the relay to overheat and short circuit.
Free Manufacturer Remedy: Owners are advised to park their vehicles outside and away from structures until the remedy is complete. Dealers will replace the engine starter, free of charge. Owner notification letters were mailed February 6, 2026. Owners may contact BMW customer service at 1-800-525-7417. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov November 14, 2025.
Affected Component: ELECTRICAL SYSTEM:STARTER ASSEMBLY
Defect Summary: BMW of North America, LLC (BMW) is recalling certain 2021-2023 Toyota Supra, 2022-2023 2 Series Coupe, 2021-2024 5 Series (xDrive), 2021-2022 Z4, 2022-2024 4 Series (Gran Coupe), 2021-2024 4 Series (Convertible and xDrive Convertible), 2021-2023 4 Series (Coupe), 2021-2024 3 Series, 2021-2023 X4, 2021-2024 X3 vehicles. Please see the recall report for a complete list of all models. The engine starter may overheat and catch fire due to wear on an internal component.
Free Manufacturer Remedy: Dealers will replace the engine starter, free of charge. Owner notification letters were mailed July 21, 2026. Owners may contact BMW customer service at 1-800-525-7417 or Toyota's customer service at 1-800-331-4331. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning March 24, 2026.
Affected Component: SEAT BELTS
Defect Summary: 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."
Free Manufacturer 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.
View all 2021 BMW 4 Series recalls & campaign history (7 campaigns) →