The Peugeot 5FW (EP6) is a 1,598 cc, inline‑four naturally aspirated petrol engine produced between 2006 and 2015. It features a DOHC 16‑valve design with variable valve timing (VVT) on the intake camshaft, delivering a balance of efficiency and responsiveness. In standard applications, it produces 88 kW (120 PS), engineered for accessible performance in compact and mid-size vehicles.
Fitted to models like the Peugeot 207, 308, and Citroën C4, the 5FW was designed for urban agility and smooth highway cruising. Emissions compliance for its production period was achieved through a three-way catalytic converter and precise fuel metering, meeting Euro 4 and later Euro 5 standards.
One documented reliability concern involves premature failure of the dephaser pulley (variable cam timing actuator), potentially causing rough running or loss of power. This issue, referenced in Peugeot Service Bulletin 10BZ12, is often linked to oil quality or infrequent changes. Later revisions saw updates to the pulley’s internal damping mechanism.
Production years 2006–2009 meet Euro 4 standards; 2010–2015 models meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/7890).
The Peugeot 5FW (EP6) is a 1,598 cc inline‑four naturally aspirated petrol engineered for compact hatchbacks and estates (2006-2015). It combines variable valve timing with multi-point fuel injection to deliver smooth, linear power delivery and good fuel economy. Designed to meet Euro 4 and Euro 5 standards, it balances everyday drivability with low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 77.0 mm × 85.8 mm | |
| Power output | 88 kW (120 PS) | |
| Torque | 160 Nm @ 4,250 rpm | |
| Fuel system | Siemens multi-point injection | |
| Emissions standard | Euro 4 (2006–2009); Euro 5 (2010–2015) | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (front‑mounted) | |
| Oil type | PSA B71 2290 (SAE 5W‑40) | |
| Dry weight | 112 kg |
The naturally aspirated design provides predictable, linear power ideal for city driving and relaxed cruising. Strict adherence to 20,000 km oil change intervals with PSA B71 2290 (5W-40) oil is critical to protect the variable cam timing (dephaser) pulley and timing chain. The Siemens fuel system is robust but benefits from high-quality, low-sulfur petrol (ULSP). The front-mounted timing chain is generally durable but should be inspected if the dephaser pulley fails. Post-2010 engines feature minor ECU updates for Euro 5 compliance.
Oil Specs: Requires PSA B71 2290 (5W-40) specification (Peugeot Owner's Manual). Equivalent to ACEA B4.
Emissions: Euro 4 certification applies to 2006–2009 models; Euro 5 for 2010–2015 (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under ECE R85 standards. Output is consistent across specified fuel quality (Peugeot TIS Doc. B31000).
Peugeot Technical Information System (TIS): Docs B30150, B31000, SIB 10BZ12
VCA Type Approval Database (VCA/EMS/7890)
UNECE Regulation No. 85 (Engine Power Measurement)
The Peugeot 5FW (EP6) was used across PSA Group's PF1 and PF2 platforms with transverse mounting. This engine received platform-specific adaptations-revised intake manifolds for the 308 and specific engine mounts for the C4-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a plate riveted to the front of the cylinder block, near the oil filter (Peugeot TIS B30150). The 8th VIN digit typically corresponds to the engine code ('W' for 5FW). Visually, the engine is identifiable by its black plastic valve cover with "1.6 VTi" branding and the absence of a turbocharger. Critical differentiation from the turbocharged EP6DT: The 5FW (EP6) is naturally aspirated and produces 120 PS, while the EP6DT has a turbo and higher output. Intake manifolds and ECUs are not interchangeable.
The 5FW's primary reliability risk is dephaser pulley failure, with elevated incidence in vehicles using poor-quality oil or extended service intervals. Peugeot service data indicates a notable number of replacements under warranty, while owner reports frequently cite a rattling noise on cold start. Adherence to the correct oil specification and timely replacement of the pulley is critical.
Analysis derived from Peugeot technical bulletins (2009-2013) and UK DVSA failure statistics (2014-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT 5FW-EP6.
Comprehensive technical documentation and regulatory references
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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)
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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
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