The Peugeot RFR (EW10J4) is a 1,997 cc, inline‑four petrol engine produced between 2001 and 2010. It features an aluminium block and head with double overhead camshafts (DOHC) and 16 valves. This naturally aspirated unit delivered 100 kW (136 PS) and 190 Nm of torque, offering a refined and linear power delivery characteristic of its era.
Fitted to models such as the Peugeot 307, 407, and Citroën C5 and C8, the RFR was engineered for smooth, comfortable cruising and responsi…
Production years 2001–2005 meet Euro 3 standards; 2006–2010 models meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/6789).
The Peugeot RFR (EW10J4) is a 1,997 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans and MPVs (2001-2010). It combines sequential multi-point fuel injection with DOHC 16-valve architecture and variable valve timing to deliver smooth, linear power. Designed to meet Euro 3 and Euro 4 standards, it balances refinement with adequate performance for highway driving.
| 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 | Siemens Sagem 34P sequential multi-point injection | |
Emissions standard | Euro 3 (2001-2005); Euro 4 (2006-2010) | |
Compression ratio | 10.4:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven with variable intake cam timing (dephaser) | |
Oil type | PSA B71 2290 (SAE 5W‑40 or 10W‑40) | |
Dry weight | 128 kg |
The Peugeot RFR (EW10J4) was used across PSA Group's PF3 platform with transverse mounting and shared with Citroën. This engine received minor ECU mapping variations between models-for instance, slightly different throttle response in the 307 versus the 407-but core mechanical components remain interchangeable. All adaptations are documented in OEM technical bulletins.
The RFR (EW10J4)'s primary reliability risk is dephaser pulley failure, with elevated incidence in high-mileage engines subjected to infrequent oil changes. Peugeot Technical Note 0815 A documents this issue, while general owner feedback highlights timing belt failures as a major cause of engine destruction. Extended service intervals make adherence to the maintenance schedule critical.
Analysis derived from Peugeot technical bulletins (2001-2010) and general owner-reported failure data. 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 RFR can be very reliable with meticulous maintenance, particularly regarding oil changes and timing belt/dephaser replacement. Its main weakness is the dephaser pulley, which is often preventable with the correct oil. Many examples exceed 250,000 km with proper care, making it a durable engine for its time.
The most critical issues are dephaser pulley failure and timing belt failure. Other frequent problems include failing ignition coils, carbon buildup in the throttle body, and oil leaks from the rocker cover gasket. These are well-documented in Peugeot service notes.
This 2.0L engine was primarily used in the Peugeot 307 (2001-2008) and 407 (2004-2010). It was also shared with Citroën, powering the C5 (2001-2008) and C8 (2002-2010). It's a key engine in PSA's early-2000s mid-size car and MPV lineup.
Yes, it has moderate tuning potential. Simple ECU remaps can yield 10-15 kW gains. More significant power is achievable with performance cams and exhaust upgrades, but the naturally aspirated design limits ultimate potential. The bottom end is strong and can handle modest increases reliably.
Real-world fuel economy is reasonable. In a Peugeot 307, expect around 8.5 L/100km (33 mpg UK) in mixed driving. Highway cruising can return 6.5-7.0 L/100km (40-43 mpg UK). City driving will be higher, around 11.0 L/100km (26 mpg UK). Figures vary with driving style and vehicle condition.
Yes, absolutely. It is an interference engine. If the timing belt breaks or jumps, the pistons will collide with the open valves, causing severe internal damage that often requires a complete engine rebuild or replacement. This makes the timing belt and dephaser service non-negotiable.
Peugeot specifies oil meeting the PSA B71 2290 standard. A high-quality 5W-40 or 10W-40 semi-synthetic or fully synthetic oil is recommended. Using the correct specification is crucial to prevent dephaser pulley failure. Change intervals should not exceed 15,000 km or 12 months.
Comprehensive technical documentation and regulatory references
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