2021 BMW 3 Series Specifications Overview
The 2021 BMW 3 Series is certified across 6 configurations with 2L 4-Cylinder Engine, 2L Plug-in Hybrid Powertrain, 3L Gas-Electric Hybrid Engine powertrain options. Available drivetrain layouts include Rear-Wheel Drive, All-Wheel Drive paired with Automatic (S8). EPA classified under the Compact Cars size category. Platform architecture belongs to the 7th Generation (G20) vehicle family.
Certified Powertrain & Transmission Configurations (6)
Official laboratory certification specifications for each factory engine, transmission, and drivetrain permutation
| Configuration / Model | Engine & Displacement | Cylinders | Induction / Tech | Transmission | Drivetrain | Fuel System |
|---|---|---|---|---|---|---|
| 330i Compact Cars | 2L 4-Cylinder Engine | 4 | Naturally Aspirated | Automatic (S8) | Rear-Wheel Drive | Premium |
| 330i xDrive Compact Cars | 2L 4-Cylinder Engine | 4 | Naturally Aspirated | Automatic (S8) | All-Wheel Drive | Premium |
| 330e Compact Cars | 2L Plug-in Hybrid Powertrain | 4 | Hybrid Electric Motor + Engine | Automatic (S8) | Rear-Wheel Drive | Premium and Electricity |
| M340i Compact Cars | 3L Gas-Electric Hybrid Engine | 6 | Hybrid Electric Assist | Automatic (S8) | Rear-Wheel Drive | Premium |
| M340i xDrive Compact Cars | 3L Gas-Electric Hybrid Engine | 6 | Hybrid Electric Assist | Automatic (S8) | All-Wheel Drive | Premium |
| 330e xDrive Compact Cars | 2L Plug-in Hybrid Powertrain | 4 | Hybrid Electric Motor + Engine | Automatic (S8) | All-Wheel Drive | Premium and Electricity |
Regulatory Classification & Safety Architecture
Federal classification standards and standard active driver assistance system capabilities
EPA Regulatory Size Class
- Compact Cars
NHTSA NCAP Body Formats
- 2021 BMW 3 Series 4 DR AWD
- 2021 BMW 3 Series 4 DR RWD
Active Safety Technology
Evaluated under federal safety compliance standards.
Powertrain, transmission, drivetrain, and regulatory classification specifications on this page are derived directly from the United States Environmental Protection Agency (EPA) and National Highway Traffic Safety Administration (NHTSA) official laboratory certification registries.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.