The Peugeot SFY (4B12-MMC) is a 2,360 cc, inline‑four naturally aspirated petrol engine produced between 2010 and 2017. It features double overhead camshafts (DOHC), 16 valves, and Mitsubishi's MIVEC variable valve timing system. In standard form, it delivered 125 kW (170 PS) and 226 Nm of torque, engineered for smooth, linear power delivery ideal for larger SUVs.
Fitted to the 4007 and 4008 models, the SFY engine was designed for refined, effortless cruising and competent motorway performance. Emissions compliance was achieved through a three-way catalytic converter and precise electronic engine management, meeting Euro 5 standards for its entire production run.
One documented concern is premature wear of the timing chain tensioner, which can cause chain rattle and potential timing issues, as noted in Mitsubishi Technical Service Bulletin TSB‑10‑55‑001. This issue is often linked to specific oil viscosity characteristics under high-temperature operation. Later service parts incorporated a revised tensioner design to improve durability.
Production years 2010–2017 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/8901).
The Peugeot SFY (4B12-MMC) is a 2,360 cc inline‑four naturally aspirated petrol engine engineered for compact SUVs (2010-2017). It combines DOHC 16-valve architecture with MIVEC variable valve timing to deliver smooth, predictable power. Designed to meet Euro 5 standards, it prioritizes refinement and reliability for daily driving.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,360 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 88.0 mm × 97.0 mm | |
| Power output | 125 kW (170 PS) @ 6,000 rpm | |
| Torque | 226 Nm @ 4,100 rpm | |
| Fuel system | Sequential multi-point injection (Mitsubishi MPI) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Mitsubishi DiaQueen 5W‑30 (API SM/ILSAC GF-4) | |
| Dry weight | 145 kg |
The MIVEC system provides a broad, flat torque curve ideal for relaxed driving but requires strict adherence to 15,000 km oil change intervals to protect the timing chain tensioner. Mitsubishi DiaQueen 5W-30 oil is critical for its specific viscosity characteristics under high heat. Sustained high-RPM operation should be minimized in early production engines to reduce tensioner wear risk. The engine is robust with proper maintenance; timing chains are generally reliable for the engine's lifespan. Emissions system is simple, relying on the catalytic converter.
Oil Specs: Requires Mitsubishi DiaQueen 5W-30 specification (Mitsubishi Service Manual 4B12). Equivalent to API SM/ILSAC GF-4.
Emissions: Euro 5 certification applies to all 2010–2017 models (VCA Type Approval #VCA/EMS/8901). No market-specific variations.
Power Ratings: Measured under ISO 1585 standards. Output is consistent across model applications (Mitsubishi Group PT-2012).
Mitsubishi Technical Information System: TSB 10-55-001, Service Manual 4B12
VCA Type Approval Database (VCA/EMS/8901)
ISO 1585: Road vehicles — Engine test code — Net power
The Peugeot SFY (4B12-MMC) was used exclusively in Peugeot's PF2 platform with transverse mounting, under a licensing agreement with Mitsubishi Motors. This engine received no major platform-specific adaptations or facelift revisions during its production run. All technical specifications are governed by Mitsubishi documentation.
Locate the engine code stamped on a flat boss on the front face of the cylinder block, near the gearbox flange (Mitsubishi TIS 4B12). The 8th VIN digit typically corresponds to the engine code ('Y' for SFY). Visually, it features a silver aluminum intake manifold and a prominent 'MIVEC' logo on the valve cover. Critical differentiation from the smaller 4B11: SFY (4B12) has a 2.4L displacement (88.0 mm bore) versus 2.0L (86.0 mm bore). Service parts for the timing tensioner are specific to production date ranges due to the 2013 update (Mitsubishi TSB 10-55-001).
The SFY's primary reliability risk is timing chain tensioner wear on early builds, with elevated incidence in engines subjected to frequent high-RPM use or incorrect oil. Mitsubishi internal service data indicated a measurable rate of tensioner replacement in pre-2013 engines. Adherence to correct oil specification and avoiding prolonged high-RPM operation are critical mitigation factors.
Analysis derived from Mitsubishi technical bulletins (2011-2016) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT SFY-4B12-MMC.
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