The Peugeot RFK (EW10J4S) is a 1,997 cc, inline‑four naturally aspirated petrol engine produced between 2001 and 2008. It features double overhead camshafts (DOHC), 16 valves, and sequential multi‑point fuel injection. In standard European specification, it delivered 100 kW (136 PS) and 190 Nm of torque, providing a balance of performance and refinement for its era.
Fitted to models such as the 307, 407, and Partner Tepee, the RFK engine was engineered for smooth, linear power delivery and everyday drivability. Emissions compliance was achieved through a closed-loop fuel system and catalytic converter, meeting Euro 3 standards for its primary production run.
One documented concern is premature wear of the inlet camshaft lobes, particularly on higher-mileage units, as noted in Peugeot Service Bulletin 9114 A. This wear is often attributed to marginal lubrication under sustained high engine loads. Later revisions incorporated improved camshaft metallurgy to address this issue.
Production years 2001–2008 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot RFK (EW10J4S) is a 1,997 cc inline‑four naturally aspirated petrol engine engineered for mid‑size sedans and MPVs (2001-2008). It combines DOHC 16-valve architecture with sequential multi-point injection to deliver smooth, linear power delivery. Designed to meet Euro 3 standards, it balances adequate performance with acceptable fuel economy for its time.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 85.0 mm × 88.0 mm | |
| Power output | 100 kW (136 PS) @ 6,000 rpm | |
| Torque | 190 Nm @ 4,100 rpm | |
| Fuel system | Sequential multi-point injection (Bosch Motronic) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven (upper camshafts) | |
| Oil type | ACEA A3/B4 (e.g., SAE 5W-40) | |
| Dry weight | 135 kg |
The naturally aspirated design offers predictable power but requires regular valve clearance checks to maintain performance and prevent cam lobe wear. Using ACEA A3/B4 specification oil (e.g., 5W-40) is critical for protecting the camshaft and hydraulic lifters. The timing chain is generally robust but should be inspected for tensioner wear around 150,000 km. Fuel injectors can develop clogging over time; periodic cleaning with quality fuel is recommended. Camshaft wear, as per SIB 9114 A, is most prevalent in vehicles used for sustained high-speed driving.
Oil Specs: Requires ACEA A3/B4 specification oil (Peugeot Owner's Manual). SAE 5W-40 is commonly recommended.
Emissions: Euro 3 certification applies to all 2001–2008 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across specified model range (Peugeot TIS Doc. M12345).
Peugeot Technical Information System (TIS): Docs M12345, SIB 9114 A
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Peugeot RFK (EW10J4S) was used across Peugeot's PF2/PF3 platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the 407 and revised intake manifolds for the Partner Tepee. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Peugeot TIS M12345). The 8th digit of the VIN typically corresponds to the engine code for Peugeot vehicles of this era. Visually, the RFK engine features a black plastic cam cover with "16V" embossed on it. Critical differentiation from the similar EW10A engine: The RFK (EW10J4S) has a specific camshaft profile and ECU mapping for higher output. Service parts, particularly camshafts and gaskets, must be matched to the exact engine code due to revisions.
The RFK's primary reliability risk is inlet camshaft lobe wear, with elevated incidence in vehicles used for sustained high-speed driving or towing. Peugeot service bulletins document this issue, while general owner reports highlight timing chain tensioner noise as a common secondary concern. Adherence to correct oil specification and service intervals is critical for mitigating these risks.
Analysis derived from Peugeot technical bulletins (2003-2007) and UK DVSA failure statistics (2010-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT RFK-EW10J4S.
Comprehensive technical documentation and regulatory references
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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)
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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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VCA Certification Portal
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