Mitsubishi 4B11 2.0 MIVEC Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility

A reconditioned 4B11 supply-only typically costs between £1,700 and £2,500, with fitted prices ranging from £2,100 to £3,000 depending on labour and additional parts. Used units start from £1,000 supply-only, while full rebuilds run £2,500-£3,500. Used pricing is [THIRD-PARTY] from Motorinsul UK; reconditioned pricing is estimated. Prices vary by variant - dual-MIVEC 150 hp units may command a premium over single-MIVEC variants. Supply-only excludes fitting; add 8-10 hours at £65-£85/hr for specialist installation. Always compare quotes - prices can vary by 20% between specialists.

• Prices vary by variant - dual-MIVEC 150 hp units may command a premium over single-MIVEC variants.
• Supply-only excludes fitting; add 8-10 hours at £65-£85/hr for specialist installation.
• Always compare quotes - prices can vary by 20% between specialists.

The 4B11 is considered a very reliable engine, but at higher mileage it is prone to oil consumption - typically due to wear on valve guides and seals, or piston ring sticking. Timing chain stretch is also common beyond 90,000-120,000 miles, particularly if oil changes have been neglected. MIVEC system issues (phaser or solenoid faults) and drive belt tensioner failure (a recall item on 2011-2012 Lancers) are also documented. Timing chain inspection is recommended at 90,000-120,000 miles. The engine has an estimated lifespan of approximately 217,000 miles (350,000 km). Regular oil changes using 5W-30 specification oil are critical to longevity.

• Timing chain inspection is recommended at 90,000-120,000 miles.
• The engine has an estimated lifespan of approximately 217,000 miles (350,000 km).
• Regular oil changes using 5W-30 specification oil are critical to longevity.

The 4B11 is fitted to multiple Mitsubishi models from 2007 to 2015: Lancer CY (2007-2017) as the 2.0 MIVEC, Outlander CW and GF (2009-2020) as the 2.0 MIVEC, ASX GA (2010-present) as the 2.0 MIVEC, Eclipse Cross GK (2017-present), and Delica D:5. It was also used in the Peugeot 4007, 4008 and Citroën C-Crosser as part of a platform-sharing arrangement with Mitsubishi. 148-150 hp in most UK applications. The engine was also used in the Hyundai G4KD and Chrysler ECN. Check your V5C or engine block stamp to confirm your exact variant.

• 148-150 hp in most UK applications.
• The engine was also used in the Hyundai G4KD and Chrysler ECN.
• Check your V5C or engine block stamp to confirm your exact variant.

For most 4B11 owners, a reconditioned unit with new timing chain, valve guide seals, piston rings and MIVEC components is the recommended choice - it addresses the engine's key weaknesses and comes with a 12-24 month warranty. Used units (£1,000-£1,500) are cheaper but carry high risk without documented timing chain history. Rebuilds (£2,500-£3,500+) are only justified for low-mileage, high-value examples or sentimental vehicles. Used: only with documented timing chain replacement and oil change history. Reconditioned: best balance - all common weak points addressed, warranty included. Rebuilt: ideal for low-mileage, well-maintained examples or long-term keepers.

• Used: only with documented timing chain replacement and oil change history.
• Reconditioned: best balance - all common weak points addressed, warranty included.
• Rebuilt: ideal for low-mileage, well-maintained examples or long-term keepers.

The engine code is stamped on a machined pad on the engine block (typically on the front, below the cylinder head) and appears on the V5C under 'Engine number' - the code will read 4B11 followed by additional characters. Use a Mitsubishi VIN decoder to confirm the exact variant from the build sheet. 4B11 (148 hp): single-MIVEC (intake only), 197 Nm torque. 4B11 (150 hp): dual-MIVEC (intake and exhaust), 200 Nm torque. 4B11 (145 hp): lower-output tune, 195 Nm torque. Fitting a single-MIVEC engine into a dual-MIVEC vehicle will cause performance issues.

• 4B11 (148 hp): single-MIVEC (intake only), 197 Nm torque.
• 4B11 (150 hp): dual-MIVEC (intake and exhaust), 200 Nm torque.
• 4B11 (145 hp): lower-output tune, 195 Nm torque.
• Fitting a single-MIVEC engine into a dual-MIVEC vehicle will cause performance issues.

The 4B11 is considered a very reliable engine with an estimated lifespan of approximately 350,000 km (217,000 miles) with proper maintenance. It is significantly more reliable than the older 4G69 and 4G63 engines it replaced. However, like all engines, it requires diligent maintenance - regular oil changes using 5W-30 specification oil are critical, particularly given the timing chain's dependence on oil quality. Budget for timing chain inspection around 90,000-120,000 miles. Drive belt tensioner should be replaced with the improved design as a preventative measure. The 4B11's all-aluminium construction and chain-drive design make it a robust, long-lasting engine. The 4B11T (turbocharged Evo X) variant shares the basic block but has different internals and is not covered on this page.

• Budget for timing chain inspection around 90,000-120,000 miles.
• Drive belt tensioner should be replaced with the improved design as a preventative measure.
• The 4B11's all-aluminium construction and chain-drive design make it a robust, long-lasting engine.
• The 4B11T (turbocharged Evo X) variant shares the basic block but has different internals and is not covered on this page.