AutoUtility currently tracks 19 official NHTSA owner defect complaints for the 2021 BMW 4 Series. Electrical System issues are the most frequently reported category, appearing in 6 complaints (31.6% of submitted records). Among these NHTSA complaint records, 1 filing cites a crash, 1 cites a fire, 1 reports one or more injuries. The 2021 BMW 4 Series belongs to the 2nd Generation (G22/G23/G26) platform.
Factual proportion of owner complaints categorized by automotive subsystem in NHTSA records
6 owner complaints submitted to NHTSA ODI for this subsystem.
4 owner complaints submitted to NHTSA ODI for this subsystem.
4 owner complaints submitted to NHTSA ODI for this subsystem.
1 owner complaint submitted to NHTSA ODI for this subsystem.
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"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..."
"The recall was issued more than 8 months ago but the remedy is still not yet available, which is very concerning as the problem may cause the event of fire even when the vehicle is parked. Issued SEP 23, 2025 Description of Problem It is possible for water to contact and enter the engine starter...."
"The engine Unknown The problem was confirmed by BMW as they sent me a notice. Unknown Unknown"
"I received a recall notice dated 9/23/2025. The recall is listed as URGENT safety issue that could cause a fire. The notice instructs not to drive the car or park in garage. It has been over 6 months now and there is still no fix. I am requesting the manufacture buyback my vehicle."
"The contact owns a 2021 BMW 430I. The contact stated that the front driver’s side seat belt chest strap was shredded. The contact was concerned that the seat belt would not safely secure the driver in a crash. The contact stated that the shredded seat belt strap might have been caused by the seat..."
Reported defect complaint volume across sibling model years (2015–2026)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2015 BMW 4 Series | 91 | 11 | 5 | View 2015 Problems → |
| 2016 BMW 4 Series | 49 | 2 | 1 | View 2016 Problems → |
| 2017 BMW 4 Series | 23 | 1 | 2 | View 2017 Problems → |
| 2018 BMW 4 Series | 34 | 5 | 1 | View 2018 Problems → |
| 2019 BMW 4 Series | 16 | 2 | 3 | View 2019 Problems → |
| 2020 BMW 4 Series | 3 | 1 | 1 | View 2020 Problems → |
| 2021 BMW 4 Series Current Page | 19 | 1 | 7 | Current |
| 2022 BMW 4 Series | 7 | 0 | 5 | View 2022 Problems → |
| 2023 BMW 4 Series | 0 | 0 | 4 | View 2023 Problems → |
| 2024 BMW 4 Series | 0 | 0 | 3 | View 2024 Problems → |
| 2025 BMW 4 Series | 7 | 2 | 1 | View 2025 Problems → |
| 2026 BMW 4 Series | 0 | 0 | 1 | View 2026 Problems → |
Complete distribution of consumer defect reports across all 8 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Injury Entries | Fatality Entries |
|---|---|---|---|---|---|
| Electrical System NHTSA category: ELECTRICAL SYSTEM | 6 | 0 | 0 | 0 | 0 |
| Engine NHTSA category: ENGINE | 4 | 0 | 1 | 0 | 0 |
| Seat Belts NHTSA category: SEAT BELTS | 3 | 0 | 0 | 0 | 0 |
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 2 | 0 | 0 | 0 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 1 | 0 | 0 | 0 | 0 |
| SEAT BELTS,SEATS,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES | 1 | 1 | 0 | 2 | 0 |
| Tires NHTSA category: TIRES | 1 | 0 | 0 | 0 | 0 |
Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year
Key performance indicators, EPA fuel economy specs, powertrain variants, and summary ratings.
Official recall campaigns, safety defect descriptions, and manufacturer free remedy instructions.
NHTSA 5-Star NCAP crash test results, driver assistance systems, and rollover resistance ratings.
EPA fuel economy ratings, electric range, and annual energy cost benchmarks.
Direct, deterministic answers synthesized from verified United States government databases for the 2021 BMW 4 Series
In official NHTSA consumer records, the most frequently cited issue area for the 2021 BMW 4 Series is Electrical System, appearing in 6 records (31.6% of submitted filings).
Secondary reported categories include Engine & Cooling (4) and Air Bags & Restraints (4).
AutoUtility does not issue subjective reliability scores or commercial ratings. In official United States government records, NHTSA tracks 19 consumer defect complaints and 7 safety recall campaigns for the 2021 BMW 4 Series.
Reviewing documented component complaint distributions, recall remedy notices, and active federal investigations provides an objective, evidence-based view of the vehicle's historical safety and defect record.
Among consumer complaint records on file with NHTSA for the 2021 BMW 4 Series, 1 filing cites a crash, 1 cite smoke or fire, and 1 report one or more injuries.
Incident entries represent consumer descriptions at the time of submission to federal authorities and do not establish mechanical causation or legal liability.
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database under 49 CFR Part 576.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.