The 1.0-liter 3-cylinder Mitsubishi 3B21 engine was assembled in Japan from 2006 to 2014 and installed on the second generation of the W451 Smart Fortwo model, popular in Europe. Such a power unit according to the nomenclature of the Daimler-Chrysler concern is known as the Mercedes M132.
The 3B2 family also includes engines: 3B20, 3B20T and 3B21T.
The engine was installed on:
- Smart Fortwo 2 (W451) in 2006 – 2014.
|Fuel system||distributed injection|
|Power output, hp||61 – 71|
|Torque output, Nm||89 – 92|
|Cylinder block||aluminum R3|
|Block head||aluminum 12v|
|Cylinder bore, mm||72|
|Piston stroke, mm||81.8|
|Recommended engine oil||5W-30|
|Engine oil capacity, liter||3.3|
|Euro standards||EURO 4/5|
|Fuel consumption, L/100 km (for Smart Fortwo 2008)
|Engine lifespan, km||~200 000|
|Weight, kg||67 (without attachments)|
Disadvantages of the Mitsubishi 3B21 engine
- The engine exists in two versions and a simple modification does not cause trouble;
- In the MHD hybrid, the starter-alternator belt warps and wears out quickly;
- A broken belt causes the pump to stop and the head immediately leads due to overheating;
- By 100,000 km, the rubber rings on the candle wells are tanned and oil gets there;
- There are no hydraulic lifters and valve clearances need to be adjusted every 100,000 km.