Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2021 M440i.
The 2021 BMW M440i, equipped with an automatic (S8) transmission and rated at 23/31/26 mpg, represents the first model year of this generation and, according to owner-reported data covering 2021–2025, it also holds the highest complaint count of the series with three total owner complaints—all focused on the engine—alongside five recalls. This places the 2021 model year at the peak of the model’s reliability concerns, as subsequent years show a decline to just one complaint by 2025, indicating that early teething issues were addressed over time. For a researcher, this positions the 2021 M440i as a critical baseline for studying initial quality and the effectiveness of later revisions.
Fluid capacities, tune-up values and fuel economy at a glance.
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses OE oil filter 11428583896. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.
| Engine oil filter | 11428583896 alt 11428583897 |
| Engine air filter | 13718635102 |
| Spark plug | 12122455258 |
| Battery | 61217604808 alt 61216806755 |
| Front wiper blades | 61619478361 |
| Thermostat | 11539494424 alt 11539494425 |
| Cabin air filter | 64119382886 alt 64119382885 |
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic (S8) |
| Overall length | 187.8 in |
| Overall width | 72.8 in |
| Overall height | 54.3 in |
| Wheelbase | 112.2 in |
| Curb weight | 4171 lb |
| Track (front / rear) | 62.2 / 62.6 in |
| EPA city / highway / combined | 23 / 31 / 26 mpg |
| Drivetrain | Rear-Wheel Drive |
| Recommended fuel | Premium Gasoline |
0–60 mph, quarter-mile, horsepower and torque from independent road tests.
Independent road tests for the M440i of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.
| Year | Trim / engine | 0–60 | ¼ mile | HP | Drivetrain |
|---|---|---|---|---|---|
| 2021 | xDrive (M Performance) 3.0L Turbo I-6 + Elec | 3.80 sec | 12.30 sec | 382 hp | AWD |
| 2021 | xDrive (M Performance) 3.0L Turbo I-6 + Elec | 4.00 sec | 12.60 sec | 382 hp | AWD |
| 2021 | Convertible (M Performance) 3.0L Turbo I-6 + Elec | 4.10 sec | 12.60 sec | 382 hp | RWD |
| 2021 | xDrive (M Performance) 3.0L Turbo I-6 + Elec | 4.10 sec | 12.40 sec | 382 hp | AWD |
| 2021 | Convertible (M Performance) 3.0L Turbo I-6 + Elec | 4.20 sec | 12.70 sec | 382 hp | RWD |
| 2022 | xDrive Gran Coupe (M Performance) 3.0L Turbo I-6 + Elec | 3.90 sec | 12.40 sec | 382 hp | AWD |
| 2022 | xDrive Gran Coupe (M Performance) 3.0L Turbo I-6 + Elec | 4.00 sec | 12.50 sec | 382 hp | AWD |
Capacities, torques and tune-up values from the factory service manual.
This engine DOT 4 brake fluid. The firing order is 1-5-3-6-2-4.
| Brake Fluid | DOT 4 |
| Clutch Fluid | DOT 4 |
| Power Steering Fluid | ATF |
| Cylinder Head Instructions | Only use new bolts. |
| Oil Pump to Cylinder BLock Bolts/Studs | 168.0 inch lbs. ft-lbs |
| Cylinder Firing Order | 1-5-3-6-2-4 |
| Refrigerant | R1234yf |
| Oil Group | PAG |
| Oil Type | 46YF |
| 1 | Bolts 1-14 | 22 ft. lbs |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
The 2021 model year records show 3 federal complaints and 5 recalls, alongside a significantly high volume of 124 Technical Service Bulletins (TSBs). Compared to the 2022 model year, which logged 0 complaints and 59 TSBs, the 2021 variant exhibits higher initial activity in both consumer reporting and service guidance. By 2025, the data indicates a stabilization with only 1 complaint and zero recalls or TSBs, suggesting early-production issues were addressed over time. Specific 2021 complaints include single instances related to the engine and service brakes, alongside one recorded fire complaint, though the data does not specify the root causes for these isolated incidents. This places the 2021 model at the beginning of the recorded reliability arc, carrying the highest recall count and TSB volume of the period. While the low absolute complaint count is positive, the elevated administrative burden suggests later model years represent a safer investment for used buyers
All 3 complaints on record, top 3 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 2 of 5 campaigns on record for this vehicle.
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… 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…
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… 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…
Showing 5 of 124 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| B010126 | 2026-05-06 | Engine | The EVAP systems purge (vent) valve limited warranty for defects in materials and / or… |
| B640422 | 2024-02-16 | Electrical System | An interference noise (groaning noise) can be heard from within the heating and… |
| B611305 | 2024-01-11 | Electrical System | The electrical system of BMW vehicles has been subject to an ongoing development process… |
| B360121 | 2024-01-08 | Steering | At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e. when… |
| B610524 | 2024-01-05 | Electrical System | The Central Information Display goes black intermittently due to resets of the Head Unit… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
NHTSA lists 5 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 23 city / 31 highway / 26 combined mpg.