Mitsubishi Engine Codes Database

A Mitsubishi engine code (e.g., 4G63, 4B11, 4N14) identifies the engine family, configuration, and generation. First digit: Number of cylinders (4 = 4-cylinder). Letter: Engine series (G = SOHC/DOHC petrol, B = modern DOHC petrol, N = diesel). Last two digits: Displacement code. Source: Mitsubishi Service Manual

Mitsubishi has largely phased out diesel engines for passenger vehicles. The 4N14 (2.2L DI-D) was the last diesel used in Outlander and L200, but production ended in 2020 for European markets. Mitsubishi now focuses on petrol and PHEV powertrains.

The 4G63 (non-turbo) is widely regarded as one of Mitsubishi's most reliable engines, known for durability and simplicity. The modern 4B11 and 4J12 are also reliable with proper maintenance. Avoid early 4G9 GDI engines due to carbon buildup issues.

Most modern Mitsubishi engines (4B, 4N, 4J series) use timing chains. Older 4G series engines typically use timing belts requiring replacement every 60,000–100,000 miles. The 4G63 uses a belt, while 4B11 uses a chain.

The non-turbo 4G63 is very reliable and can exceed 200,000 miles with proper maintenance. The turbocharged 4G63T (used in Lancer Evolution) is robust but requires careful maintenance. Common issues include oil consumption and timing belt wear.

On the 4B11 or 4J12 engine, the code is stamped on the valve cover or on a label near the front timing cover. Also check the V5C logbook under 'Engine Number'.

On the UK V5C registration document, look for the 'Engine Number' field (not VIN). This matches the engine code (e.g., 4B11, 4N14). If the engine was replaced, this may not reflect the current unit.

4B11: 2.0L DOHC petrol with MIVEC – used in Lancer, ASX. 4J12: 2.4L DOHC petrol with MIVEC – used in Outlander. Both are modern engines, but 4J12 has larger displacement and more torque.

Yes. The engine code (e.g., 4B11T, 4N14) is required for ordering correct parts (ECU, turbo, injectors). Using VIN alone can lead to errors. Always verify with the physical engine code.

Yes. High-performance engines (4G63T in Evolution) or engines with known issues can increase premiums. Insurers use engine type to assess risk. Always declare correct engine code.

The 4B11 (2007–present) is designed for 150,000–200,000 miles with proper maintenance. Known for reliability and efficient MIVEC system. Regular oil changes and timing chain inspection are critical.

The 4N14 (2.2L DI-D) is generally reliable but can suffer from DPF clogging in urban use and EGR issues. Common in Outlander (pre-2020). Service interval: 12,000 miles in UK conditions.

Mitsubishi 4G6 series engines were licensed to Hyundai in the 1990s–2000s. The 4G63 and 4G64 powered early Hyundai Sonata, Santa Fe, and Trajet models before Hyundai developed their own engines.

Yes. The Outlander PHEV uses a modified 4B11 (2.0L petrol) paired with electric motors. The engine is optimized for hybrid operation with Atkinson cycle efficiency.

Yes, but must be declared to DVLA. Changing engine code (e.g., petrol to diesel) may affect MoT, insurance, and emissions compliance. Source: DVLA guidelines

Positions 4–7 of the VIN indicate engine type and model. Example: JA4... → specific codes for engine family. Use a Mitsubishi-specific VIN decoder for accuracy.

Some are. The 4G63 (non-turbo) and 6G72 are simpler and very durable. Modern 4B and 4J engines offer better efficiency and emissions but are more complex. Choose based on intended use.

Use Mitsubishi Motors Service Manual or Technical Information System. Public data also in EU type-approval documents.