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.
- • Total NHTSA Complaints: 19 reports
- • #1 Reported Problem Area: Electrical System (6 reports • 31.6% of submitted complaints)
- • Secondary Problem Areas: Engine & Cooling (4), Air Bags & Restraints (4)
- • Crash-Citing Complaints: 1 filings
- • Fire-Citing Complaints: 1 filings
- • Complaints Reporting Injuries / Fatalities: 1 injury filings • 0 fatality filings
Most Reported Problems for 2021 BMW 4 Series
Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records
Electrical System
NHTSA records list 3 official safety recall campaigns for this model year involving the same broad component area:
- Campaign #26V056000 ELECTRICAL SYSTEM:STARTER ASSEMBLY
- Campaign #25V636000 ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY
- Campaign #20V761000 ELECTRICAL SYSTEM:12V/24V/48V BATTERY
Engine & Cooling
Air Bags & Restraints
NHTSA records list 3 official safety recall campaigns for this model year involving the same broad component area:
- Campaign #21V554000 SEAT BELTS
- Campaign #23V584000 SEAT BELTS
- Campaign #21V176000 AIR BAGS:SIDE/WINDOW:THORAX
Powertrain & Transmission
Wheels & Tires
Recent NHTSA Owner Reports for 2021 BMW 4 Series
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..."
Complaint History for BMW 4 Series
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 → |
Detailed NHTSA Component Breakdown for 2021 BMW 4 Series
Complete distribution of consumer defect reports across all 8 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Reported Injury Entries | Reported 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 |
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.