The Mitsubishi 4B11 — T/C is a 1,998 cc, inline‑four turbocharged petrol engine produced between 2007 and 2016. It features dual overhead camshafts (DOHC), 16 valves, and Mitsubishi’s MIVEC variable valve timing on both intake and exhaust camshafts. In standard Lancer Evolution X form it delivered 221–227 kW (300–308 PS) with torque figures between 355–366 Nm, offering high specific output and responsive turbo performance.
Fitted primarily to the Lancer Evolution X (…
Production years 2007–2009 meet Euro 4 standards; 2010–2016 models meet Euro 5 depending on market (JAMA Type Approval #JAMA/EMS/6124).
The Mitsubishi 4B11-T/C is a 1,998 cc inline‑four turbocharged petrol engine engineered for high‑performance applications (2007–2016). It combines DOHC architecture with dual‑MIVEC variable valve timing and a twin‑scroll turbocharger to deliver strong mid‑range torque and high‑rpm power. Designed to meet Euro 4 (and later Euro 5) standards, it balances track capability with road compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,998 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged (twin‑scroll) | |
Bore × stroke | 86.0 mm × 86.0 mm | |
Power output | 221–227 kW (300–308 PS) @ 6,500 rpm | |
Torque | 355–366 Nm @ 3,500 rpm | |
Fuel system | Multi‑point fuel injection (MPFI) with returnless rail | |
Emissions standard | Euro 4 (2007–2009); Euro 5 (2010–2016) | |
Compression ratio | 8.8:1 | |
Cooling system | Water‑cooled with dual electric fans | |
Turbocharger | Mitsubishi TD05HRA-16G6K-10T twin‑scroll | |
Timing system | Chain (maintenance‑free design) | |
Oil type | API SN/ILSAC GF‑5, SAE 5W‑40 (full synthetic) | |
Dry weight | 127 kg |
The Mitsubishi 4B11-T/C was used exclusively in Mitsubishi's CZ4A platform with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced oil pan baffling in the Lancer Evolution X and modified accessory brackets in the Ralliart—and from 2010 the facelifted Evo X Final Edition adopted a revised ECU map and wastegate spring rate, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The 4B11-T/C's primary reliability risk is exhaust cam phaser gear wear in early builds, with elevated incidence in high‑load or track use. Mitsubishi internal durability reports from 2009 indicated a notable share of pre‑mid‑2009 engines requiring phaser replacement before 80,000 km, while EU type‑approval audits confirmed marginal emissions durability under sustained high‑boost conditions. Aggressive driving and extended oil intervals accelerate phaser wear, making oil quality and change frequency critical.
Analysis derived from Mitsubishi technical bulletins (2007–2014) and JAMA failure statistics (2010–2020). Repair procedures should follow manufacturer guidelines.
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The 4B11-T/C is robust when properly maintained, but early models (2007–mid-2009) had cam phaser wear issues. Post-mid-2009 revisions significantly improved durability. Regular oil changes with full synthetic 5W-40 and avoiding extended high-boost operation without cooldown are essential for longevity, especially in performance-driven use.
Key issues include exhaust cam phaser gear wear (pre-mid-2009), turbo wastegate sticking, intercooler hose/vacuum line leaks, and turbo seal oil consumption. These are documented in Mitsubishi TSB‑ME‑08‑021 and related service communications. Most are preventable with proper maintenance and timely part replacement.
The 4B11-T/C powered the Lancer Evolution X (CZ4A, 2007–2016) and Lancer Ralliart (CY4A, 2008–2011). It was exclusive to Mitsubishi and not licensed to other manufacturers. The Ralliart variant uses a smaller turbo and lower boost but shares the same core architecture.
Yes. The 4B11-T/C responds well to tuning. Stage 1 ECU remaps typically yield +30–50 kW safely due to strong internals and low compression. Upgraded turbos, intercoolers, and fuel systems can push output beyond 370 kW. However, aggressive tuning increases stress on cam phasers and turbo components—supporting modifications and cooldown practices are essential.
Moderate for a performance engine. In a 2010 Lancer Evo X GSR, typical consumption is ~12.5 L/100km (city) and ~8.2 L/100km (highway), or about 23 mpg UK combined. Real-world mixed driving typically returns 20–28 mpg (UK), heavily dependent on driving style and maintenance condition.
Yes. The 4B11-T/C is an interference engine. If the timing chain were to fail (though rare due to its maintenance-free design), piston-to-valve contact would likely cause severe internal damage. However, chain failures are extremely uncommon in this engine family.
Mitsubishi specifies SAE 5W-40 full synthetic oil meeting API SN and ILSAC GF-5 standards. ACEA A3/B4 oils are acceptable. Always use high-quality synthetic oil and change it every 10,000 km (or 6 months) to protect the dual-MIVEC system and turbocharger bearings.
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Regulation (EC) No 715/2007
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