Summary
| Teardown analysis held at the Hiroshima Kokusai Gakuin University Automotive Junior College (Photographed by reporter, the same hereinafter) |
This report will introduce the teardown analysis of the BMW 320i M Sport sponsored by the Hiroshima Industrial Promotion Organization, focusing on the drivetrain and intake/exhaust subsystems that work with the 2.0-liter inline four-cylinder gasoline engine described in the previous report.
Vehicle overview
The BMW 3 Series underwent a full redesign in October 2018. The 320i used for this teardown analysis features a detuned 330i engine. In Germany, BMW’s home location, the model is sold as a low-priced version, but for the Japanese market, the model combines the engine with a high-grade interior and equipment and is sold as a Japan-exclusive model. The model is offered in three trim levels: Standard, SE, and M Sport, but all perform identically. The M Sport, aside from differences in cosmetic parts, differs only in a suspension system with grade-specific settings, a “sport” automatic transmission featuring the ability to change shift timing, and non-linear geared “variable sport” steering (the greater the steering wheel is turned, the quicker the vehicle turns). Major vehicle specs are as follows.
Teardown analysis vehicle: BMW 320i M Sport Japan Edition
| Item | Spec |
|---|---|
| Vehicle type | 3BA-5F20 |
| Length/width/height | 4715 / 1825 / 1430 mm |
| Wheelbase/tread | 2850 / 1585 (front) / 1570 (rear) mm |
| Vehicle weight | 1560 kg |
| Transmission | 8-speed torque converter automatic transmission with mode selection |
| Emission standards | Compliant with 2018 standards |
| Fuel efficiency (Ministry of Land, Infrastructure, Transport and Tourism examination value) | 15.2 (JC08), 13.1 (WLTC-comb.) km/l |
| Vehicle base price | JPY 5.4 million (excluding consumption tax) |
Related reports:
BMW 320i Teardown: B48 2.0L inline 4-cylinder engine （Mar. 2020）
Local Reconstruction Note
This article has been expanded from the visible local mirror text, headings, tags, image captions, tables, and related local article titles. It is presented as a reconstructed reading version, not as a hidden original document.
Intake system: Air cleaner to electric throttle valve
The source outline identifies this section as part of “BMW 320i Teardown: Drivetrain, intake and exhaust system configurations”. Based on the available local metadata, this section should be read through the lens of Charge Air Cooler, Catalytic Converter, Bracket, AT, Air Cleaner, MANN+HUMMEL and the visible introduction, figures, captions, and tables.
Exhaust system: Catalyst to tailpipe
The source outline identifies this section as part of “BMW 320i Teardown: Drivetrain, intake and exhaust system configurations”. Based on the available local metadata, this section should be read through the lens of Charge Air Cooler, Catalytic Converter, Bracket, AT, Air Cleaner, MANN+HUMMEL and the visible introduction, figures, captions, and tables.
Drivetrain: Transmission to half shaft
The source outline identifies this section as part of “BMW 320i Teardown: Drivetrain, intake and exhaust system configurations”. Based on the available local metadata, this section should be read through the lens of Charge Air Cooler, Catalytic Converter, Bracket, AT, Air Cleaner, MANN+HUMMEL and the visible introduction, figures, captions, and tables.
List of major component suppliers (powertrain, thermal management)
The source outline identifies this section as part of “BMW 320i Teardown: Drivetrain, intake and exhaust system configurations”. Based on the available local metadata, this section should be read through the lens of Charge Air Cooler, Catalytic Converter, Bracket, AT, Air Cleaner, MANN+HUMMEL and the visible introduction, figures, captions, and tables.
Related Local Signals
Nearby records in the local archive include Smart Energy Week 2026: Batteries and Charging; Electrified Vehicle (xEV) Sales Monthly Report (March 2026); Geely i-HEV Intelligent Hybrid Technology Presentation; Mobile World Congress 2026 (3) Evolution of Connected and Autonomous Mobility. These titles can be used as adjacent evidence when comparing suppliers, technologies, markets, and reporting periods.