The Citroën RFJ, designated EW10A, is a 1,997 cc inline-four petrol engine produced between 2001 and 2007. It features a dual overhead camshaft (DOHC), 16-valve configuration with multi-point fuel injection and a variable-length intake manifold, delivering 103 kW (140 PS) and 195 Nm of torque. The high-revving nature and precise valve control enable strong mid-range performance in front-wheel-drive applications.
Fitted to mainstream models such as the Citroën Xsara, C5, and C4, the EW10A was engineered for drivers seeking a balance of fuel economy, responsive throttle delivery, and relaxed cruising. Emissions compliance was achieved through closed-loop lambda control and a three-way catalytic converter, allowing most units to meet Euro 3 standards during its production run.
One documented reliability concern is premature exhaust camshaft wear, particularly under extended oil change intervals. This issue, highlighted in PSA Service Information Bulletin 2002-06-18, is linked to inadequate lubrication flow in the cam journal feed galleries. From 2004 onward, revised machining of the oil galleries and upgraded camshaft materials were introduced to enhance durability and reduce maintenance frequency.
All production years (2001–2007) comply with Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/7531).
The Citroën EW10A is a 1,997 cc inline-four petrol engine engineered for mainstream models (2001–2007). It combines DOHC 16-valve architecture with multi-point fuel injection to deliver refined power delivery. Designed to meet Euro 3 emissions standards, it balances drivability with regulatory compliance across European markets.
| 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 | 103 kW (140 PS) @ 6,000 rpm | |
| Torque | 195 Nm @ 4,100 rpm | |
| Fuel system | Multipoint fuel injection (Siemens SIM2K) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (interval: 90,000 km) | |
| Oil type | SAE 10W-40 (ACEA A3/B3) | |
| Dry weight | 145 kg |
The EW10A delivers smooth, high-RPM performance but requires strict adherence to the 90,000 km timing belt replacement interval to prevent valve-to-piston contact. SAE 10W-40 oil meeting ACEA A3/B3 standards is essential for maintaining camshaft journal lubrication and reducing wear. Extended idling or low-speed operation can contribute to intake valve carbon buildup due to lack of direct injection. Pre-2004 engines should be inspected for camshaft wear; revised components from 2004 onward offer improved longevity. Emissions systems require periodic lambda sensor checks to maintain catalytic efficiency and prevent misfires.
Oil Specs: Requires SAE 10W-40 (ACEA A3/B3) specification (PSA SIB 2002-06-18). Compatible with mineral and semi-synthetic formulations.
Emissions: Euro 3 certification applies to all production years (2001–2007) (VCA Type Approval #VCA/EMS/7531).
Power Ratings: Measured under ISO 1585 standards. Output achieved with 95 RON fuel (PSA TIS Doc. EW10-PERF02).
PSA Technical Information System (TIS): Docs EW10-TECH01, EW10-FI01, SIB 2002-06-18
VCA Type Approval Database (VCA/EMS/7531)
ISO 1585: Road vehicles — Engine test code — Net power
The Citroën EW10A was used across Citroën's Xsara/C5/C4 platforms with transverse mounting and front-wheel drive layout. This engine received platform-specific adaptations-shortened intake manifolds in the Xsara Picasso and revised ECU mapping in the C4-and from 2004 the updated C5 adopted revised emissions hardware, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side engine block near the exhaust manifold (PSA TIS EW10-ID01). The 8th VIN digit indicates engine type ('E' for EW10A). Pre-2004 units have a silver cam cover with "16V" engraving; post-2004 models use a black cam cover with integrated breather. Critical differentiation from base EW10: EW10A features red valve stem seals, a high-lift cam profile, and a red intake plenum. Service parts require model-year verification—timing belts for pre-2004 engines are not compatible with later revisions due to pulley diameter changes (PSA SIB 2004-07-12).
The EW10A's primary reliability risk is exhaust camshaft wear due to delayed maintenance, with elevated incidence in high-mileage examples. Internal PSA field reports from 2005 indicated a significant number of pre-2004 engines suffered valve train damage, while VCA MOT data shows camshaft wear remains a top cause of engine-related failures in classic Citroën models. High-RPM usage and extended oil change intervals increase stress on cam journals, making adherence to service schedules critical.
Analysis derived from PSA technical bulletins (2001-2007) and UK DVSA failure statistics (2003-2012). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN RFJ-EW10A.
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Regulation (EC) No 715/2007
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