4G12A

The 4G12A is an internal combustion engine manufactured by Mitsubishi Motors. It is part of the Mitsubishi Sirius engine family, a series of inline-four gasoline engines known for their durability and versatility. The 4G12A typically features a displacement of 1.6 liters, although specific variations might exist. It is an overhead camshaft (OHC) engine, meaning the camshaft is located in the cylinder head, driving the valves directly or via rocker arms.

This engine was commonly found in various Mitsubishi models produced from the 1980s through the early 2000s. Examples include compact cars and smaller SUVs. The 4G12A was generally offered in naturally aspirated configurations, relying on the intake and exhaust systems to draw in air and expel exhaust gases. Fuel delivery was typically managed by a carburetor in earlier versions, with later models adopting electronic fuel injection for improved efficiency and emissions control.

The design of the 4G12A emphasizes a balance between performance and fuel economy suitable for everyday driving. While not designed for high-performance applications, it provided reliable power for its intended vehicle segments. Its robust construction contributed to its reputation for longevity and ease of maintenance, making it a popular choice for many consumers. Parts availability and aftermarket support for the 4G12A remain generally good due to its widespread use.