2021 Bmw M440I problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
4 owner complaints analyzed
5 distinct recall campaigns
Not available median reported failure mileage
Scope: 2021 model year. Data snapshot: . 0 complaints include usable failure mileage.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
Engine is the most frequently named component, appearing in 1 of 4 complaints (25.0%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 1 | 25.0% |
| Electrical and battery issues | 1 | 25.0% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Engine | 1 |
| Forward Collision Avoidance: Adaptive Cruise Control | 1 |
| Seat Belts | 1 |
| Seats | 1 |
| Service Brakes | 1 |
| Unknown Or Other | 1 |
Engine: 1; Forward Collision Avoidance: Adaptive Cruise Control: 1; Seat Belts: 1; Seats: 1; Service Brakes: 1; Unknown Or Other: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 0; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
No usable failure mileage is recorded. 4 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2021 | 1 |
| 2023 | 1 |
| 2025 | 1 |
| 2026 | 1 |
2021: 1; 2023: 1; 2025: 1; 2026: 1
Pattern summary
Engine leads the component reports. Braking behavior appears in 1 complaint narratives. Electrical and battery issues appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11499824 · 2023-01-02 (January 2, 2023)
Vehicle brakes malfunctioned.
Owner-reported narrative. Look up ODI 11499824 at NHTSA ↗
Owner report 11753304 · 2026-07-28 (July 28, 2026)
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…
Owner-reported narrative. Look up ODI 11753304 at NHTSA ↗