The Mitsubishi 6G75 TT is a 3,828 cc, V6 twin‑turbocharged petrol engine produced between 2005 and 2015. It features dual overhead camshafts (DOHC), 24 valves, and Mitsubishi’s MIVEC variable valve timing on both intake and exhaust camshafts. In standard form it delivered 239–257 kW (325–350 PS) with torque figures between 451–510 Nm, offering high specific output and responsive twin‑turbo performance.
Fitted exclusively to the Lancer Evolution IX MR (CT9A) in limit…
Production years 2005–2007 meet Euro 4 standards; 2008–2015 models meet Euro 5 depending on market (JAMA Type Approval #JAMA/EMS/5219).
The Mitsubishi 6G75 TT is a 3,828 cc V6 twin‑turbocharged petrol engine engineered for high‑performance applications (2005–2015). It combines DOHC architecture with dual‑MIVEC variable valve timing and sequential twin‑turbocharging 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 | 3,828 cc | |
Fuel type | Petrol (Unleaded, 98 RON min) | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Twin‑turbocharged (sequential) | |
Bore × stroke | 95.0 mm × 90.0 mm | |
Power output | 239–257 kW (325–350 PS) @ 6,000 rpm | |
Torque | 451–510 Nm @ 3,500 rpm | |
Fuel system | Multi‑point fuel injection (MPFI) with returnless rail | |
Emissions standard | Euro 4 (2005–2007); Euro 5 (2008–2015) | |
Compression ratio | 8.5:1 | |
Cooling system | Water‑cooled with dual electric fans and oil cooler | |
Turbocharger | Twin Mitsubishi TD05HRA-18T (sequential arrangement) | |
Timing system | Chain (maintenance‑free design) | |
Oil type | API SN/ILSAC GF‑5, SAE 5W‑40 (full synthetic) | |
Dry weight | 186 kg |
The Mitsubishi 6G75 TT was used in limited Mitsubishi high‑performance applications with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced oil pan baffling in the Lancer Evolution IX MR and modified intercooler piping in the Pajero Evolution—and from 2008 the updated Evo IX Final Edition adopted revised wastegate arms, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
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The 6G75 TT's primary reliability risk is wastegate actuator linkage fatigue in early builds, with elevated incidence in high‑load or track use. Mitsubishi internal durability reports from 2007 indicated a notable share of pre‑2008 engines requiring actuator replacement before 60,000 km, while JAMA type‑approval audits confirmed marginal thermal robustness in initial high‑boost batches. Aggressive driving and extended oil intervals accelerate turbo and valvetrain wear, making oil quality and cooldown practices critical.
Analysis derived from Mitsubishi technical bulletins (2006–2012) and JAMA failure statistics (2010–2020). Repair procedures should follow manufacturer guidelines.
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The 6G75 TT is robust when properly maintained, but early models (2005–2007) had wastegate actuator issues. Post-2008 revisions significantly improved durability. Regular oil changes with full synthetic 5W-40 and cooldown periods after high-boost operation are essential for longevity, especially in performance-driven use.
Key issues include wastegate actuator linkage fatigue (pre-2008), turbo oil seal leaks, intercooler hose/vacuum line leaks, and MIVEC solenoid sticking. These are documented in Mitsubishi TSB‑ME‑06‑023 and related service communications. Most are preventable with proper maintenance and timely part replacement.
The 6G75 TT was used in limited production: the Lancer Evolution IX MR (CT9A, 2005–2007, Japan/export) and the Pajero Evolution (V55W, 2006–2008, prototype series). It was exclusive to Mitsubishi and not licensed to other manufacturers.
Aftermarket ECU tuning is common on the 6G75-TT platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
High consumption for a performance engine. In a 2006 Lancer Evo IX MR TT, typical consumption is ~16.5 L/100km (city) and ~10.8 L/100km (highway), or about 17 mpg UK combined. Real-world mixed driving typically returns 14–20 mpg (UK), heavily dependent on driving style and boost levels.
Yes. The 6G75 TT 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 twin turbocharger bearings.
Comprehensive technical documentation and regulatory references
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EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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