BMW 320i Teardown: Drivetrain, intake and exhaust system configurations
Subsystems that work with modular engines
|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.
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
|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)|
BMW 320i Teardown: B48 2.0L inline 4-cylinder engine （Mar. 2020）