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, q…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The SFZ engine is fundamentally robust and smooth, with its main weakness being the MIVEC solenoid and timing chain tensioner, both of which are susceptible to oil sludge. With strict adherence to oil change intervals using the correct 5W-30 oil, these engines can be very reliable and easily surpass 200,000 km. It's a low-stress, durable powerplant.
The most frequent issues are failure of the MIVEC variable valve timing solenoid, wear of the timing chain tensioner causing rattle, oil leaks from the valve cover gasket, and contamination of the Mass Air Flow sensor. These are well-documented in Mitsubishi service bulletins and owner communities.
This 2.4L petrol engine was used in the Peugeot 4007 (2007-2012) and its successor, the 4008 (2012-2017). It was also fitted to the Citroën C-Crosser (2007-2012) as part of the PSA Group's partnership with Mitsubishi, sharing the platform and powertrain.
Significant power gains are difficult due to the naturally aspirated design. An ECU remap might yield 5-10 kW and 10-15 Nm by optimizing ignition and fuel maps. More substantial power requires forced induction, which is complex and costly. It's best appreciated for its smooth, linear power delivery.
Real-world fuel economy is moderate for its size. In a Peugeot 4007, expect around 11.5 L/100km in the city and 7.5 L/100km on the highway, averaging 9.0 L/100km (approx. 31 mpg UK) combined. The slightly lighter 4008 may achieve marginally better figures, around 8.7 L/100km (32 mpg UK) combined.
Yes. The SFZ (4B12-MMC) is an interference engine. If the timing chain were to break or jump significantly, the pistons would collide with the open valves, causing severe and expensive internal engine damage. While chain failure is rare, tensioner failure can lead to chain slack and potential jumping.
Peugeot/Mitsubishi specifies oil meeting the Mitsubishi DiaQueen 5W-30 or equivalent PSA B71 2290 standard. This full synthetic oil is essential for protecting the MIVEC system and ensuring proper lubrication of the timing chain tensioner. Change intervals should not exceed 15,000 km or one year.
Comprehensive technical documentation and regulatory references
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PEUGEOT Official Site
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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.
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