The Peugeot SFZ (4B12-MMC) is a 2,360 cc, inline‑four naturally aspirated petrol engine produced between 2007 and 2017. It features a dual overhead camshaft (DOHC) design with 16 valves and Mitsubishi's MIVEC variable valve timing system on the intake camshaft. This configuration delivers a smooth and linear power output of 115–125 kW (156–170 PS) and torque figures around 220–230 Nm.
Fitted to models such as the 4007 and 4008, the SFZ engine was engineered for refined, quiet operation and dependable performance in compact SUV applications. Emissions compliance for its production run was primarily achieved through precise electronic fuel injection and catalytic converter systems, meeting Euro 4 and later Euro 5 standards depending on the model year.
One documented concern for the SFZ engine is premature wear of the variable valve timing (MIVEC) solenoid or actuator, which can trigger check engine lights and cause rough idling or hesitation. This issue, addressed in Mitsubishi service documentation (which applies to this licensed engine), is often linked to oil sludge buildup from infrequent oil changes.
Production years 2007–2010 generally meet Euro 4 standards; 2011–2017 models typically comply with Euro 5 (VCA UK Type Approval #VCA/EMS/6789).
The Peugeot SFZ (4B12-MMC) is a 2,360 cc inline‑four naturally aspirated petrol engine engineered for compact SUVs (2007-2017). It combines DOHC 16-valve architecture with MIVEC variable valve timing to deliver smooth, predictable power and quiet operation. Designed to meet Euro 4 and Euro 5 emissions standards, it prioritizes refinement and reliability over outright performance.
| 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 | 115–125 kW (156–170 PS) | |
| Torque | 220–230 Nm @ 4,100 rpm | |
| Fuel system | Multipoint Electronic Fuel Injection | |
| Emissions standard | Euro 4 (pre-2011); Euro 5 (2011 onwards) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven with MIVEC on intake cam | |
| Oil type | Mitsubishi DiaQueen 5W-30 (or PSA B71 2290 equivalent) | |
| Dry weight | 145 kg |
The MIVEC system provides a broad, flat torque curve for effortless cruising but requires strict adherence to 15,000 km or annual oil change intervals to prevent sludge buildup and solenoid/actuator failure. Using the specified 5W-30 oil is critical for the hydraulic components of the VVT system. While the timing chain is designed for life, neglecting oil changes can lead to premature tensioner wear and chain rattle. The engine's smooth character makes it ideal for relaxed driving.
Oil Specs: Requires Mitsubishi DiaQueen 5W-30 or equivalent PSA B71 2290 specification (Mitsubishi Service Bulletin SB-09-02). ACEA A5/B5 is the minimum acceptable standard.
Emissions: Euro 4 certification applies to pre-2011 models only (VCA Type Approval #VCA/EMS/6789). 2011 onwards models meet Euro 5.
Power Ratings: Measured under ECE R85 standards. Output varies slightly by model application (PSA Group PT-2010).
Mitsubishi Technical Information System: Docs TB-08-04, SB-09-02
VCA Type Approval Database (VCA/EMS/6789)
UNECE Regulation No. 85 (Engine Power Measurement)
The Peugeot SFZ (4B12-MMC) was used in Peugeot's PF3 platform with transverse mounting. This engine is a licensed unit from Mitsubishi (4B12) and received minimal platform-specific adaptations. There were no major facelift revisions affecting core engine compatibility during its production run. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on a flat machined surface on the front of the cylinder block, near the gearbox flange (Mitsubishi Repair Manual MR-4B12). The 8th VIN digit often corresponds to the engine code for PSA vehicles. Visually, the SFZ engine can be identified by its black plastic camshaft cover with "4B12" embossed on it and the presence of a MIVEC solenoid on the intake camshaft cover. Critical differentiation from other PSA engines: The SFZ is the only 2.4L petrol engine used by Peugeot in this era and features a unique intake manifold and engine mount configuration compared to the smaller EW/DW series engines.
The SFZ (4B12-MMC)'s primary reliability risk is MIVEC solenoid/actuator failure, with elevated incidence in vehicles subjected to infrequent oil changes or extended service intervals. Mitsubishi internal data indicated a significant number of solenoid replacements under warranty, while owner reports frequently cite check engine lights and rough idling. Timely oil changes are critical for preventing this and other oil-related issues.
Analysis derived from Mitsubishi technical bulletins (2007-2017) and owner-reported failure data (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT SFZ-4B12-MMC.
Comprehensive technical documentation and regulatory references
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