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, linea…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The RFK engine is generally robust, but its long-term reliability hinges on addressing the known camshaft wear issue. Engines that have had the camshafts replaced with revised parts, or those maintained with strict adherence to oil changes using the correct specification, can be very reliable. Neglecting this can lead to expensive repairs.
The most critical issue is premature wear of the inlet camshaft lobes. Other common problems include timing chain tensioner rattle, oil leaks from the valve cover gasket, and failures of the coolant temperature sensor. These are well-documented in Peugeot service information.
This 2.0L petrol engine was primarily used in the Peugeot 307 (2001-2008), the Peugeot 407 (2004-2008), and the early Peugeot Partner Tepee (2008-2010). It was the higher-output variant of the EW10 engine family for these models.
Yes, but gains are modest. An ECU remap can yield around 10-15 kW (15-20 PS) by optimizing ignition and fuel maps. More significant power increases require hardware changes like a performance exhaust and intake, which offer limited returns on a naturally aspirated engine. Reliability should be the priority.
Real-world fuel economy varies greatly. In a Peugeot 307, expect around 8.5-9.5 L/100km (30-33 mpg UK) in mixed driving. Highway cruising can see figures closer to 6.5-7.0 L/100km (40-43 mpg UK). City driving will be significantly higher, around 11-12 L/100km (24-26 mpg UK).
Yes. The RFK is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing severe internal engine damage. This makes addressing any timing chain rattle promptly very important.
Peugeot specifies an oil meeting ACEA A3/B4 standards. A 5W-40 or 10W-40 viscosity grade is typically recommended. Using the correct specification is crucial for protecting the camshafts and ensuring proper operation of the hydraulic lifters and tensioner.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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