The Citroen EW7J4 is a 1,360 cc, inline-four petrol engine produced between 2004 and 2012. Part of the PSA EW family, it delivers balanced performance for compact and mid-size vehicles. Equipped with a dual overhead camshaft (DOHC), multi-point fuel injection, and variable valve timing, it produces 70 kW (95 PS) with 133 Nm of torque, offering smooth and responsive driving characteristics.
Fitted primarily to the Citroën C4 and Peugeot 307, the EW7J4 was engineered for driver comfort, refined power delivery, and emissions compliance. Emissions control meets Euro 4 standards via a three-way catalytic converter and closed-loop lambda feedback, enabling broad European market acceptance. Its aluminium block and DOHC architecture support lightweight efficiency and mechanical refinement.
One documented concern is premature camshaft wear observed in certain 2004–2006 production units, highlighted in PSA Technical Bulletin TGB013. This issue is attributed to marginal oil flow design in early cylinder heads. From 2007 onward, revised oil gallery machining and upgraded camshafts were implemented to resolve the issue.
Production years 2004–2012 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/9789).
The Citroen EW7J4 is a 1,360 cc inline-four petrol engine engineered for compact and family vehicles (2004–2012). It combines DOHC 16-valve architecture with variable valve timing to deliver smooth, linear power delivery. Designed to meet Euro 4 emissions standards, it balances drivability with fuel efficiency and low emissions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,360 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 78.5 mm × 70.0 mm | |
| Power output | 70 kW (95 PS) @ 6,000 rpm | |
| Torque | 133 Nm @ 4,000 rpm | |
| Fuel system | Multi-point fuel injection (Siemens SIM2K) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (interval: 120,000 km or 8 years) | |
| Oil type | SAE 10W-40, ACEA A3/B3 | |
| Dry weight | 115 kg |
The naturally aspirated DOHC design provides smooth, linear power delivery ideal for relaxed driving, but demands strict timing belt maintenance to prevent engine damage. SAE 10W-40 ACEA A3/B3 oil is recommended to ensure adequate camshaft lubrication, particularly in early production units. Cold-start idling should be minimized to reduce wear during warm-up. The Siemens SIM2K injection system requires periodic injector cleaning to maintain fuel atomization and idle stability. Post-2007 models feature improved cylinder head oiling; pre-2007 engines should be inspected for cam lobe wear per PSA TGB013. The three-way catalytic converter requires unleaded fuel meeting EN 228 standards to prevent poisoning.
Oil Specs: Requires ACEA A3/B3 specification (PSA SIB TGB013). BMW Longlife or VW 502 00 not compatible.
Emissions: Euro 4 certification applies to all EW7J4 models (2004–2012) (VCA Type Approval #VCA/EMS/9789).
Power Ratings: Measured under ECE R85 standards. Output consistent across fuel qualities meeting EN 228 (PSA TIS EW7012).
PSA Technical Information System (TIS): Docs EW7001, EW7012, TGB013
VCA Type Approval Database (VCA/EMS/9789)
ISO 1585:1996 Road vehicles — Engine test code — Net power
The Citroen EW7J4 was used across Citroen's C4 platform with transverse mounting and shared with Peugeot under PSA platform commonality. This engine received model-specific tuning-for smoother throttle response in the C4-and from 2007 the updated cylinder head with revised oil galleries, creating interchange limits. Partnerships within the PSA Group allowed Peugeot's 307 to use identical powertrain calibration. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the right-side of the cylinder block near the exhaust manifold (PSA TIS EW7005). The 8th VIN digit indicates engine type ('E' for EW7J4 series). Pre-2007 models have a silver cam cover with black intake manifold; post-2007 units use black cam covers. Critical differentiation from EW7J4S: EW7J4 has Siemens SIM2K ECU with rectangular diagnostic connector, while EW7J4S uses Magneti Marelli with round port. Service parts require production date verification - timing belts for engines before 06/2007 are incompatible with later revised tensioners (PSA SIB TGB013).
The EW7J4's primary reliability risk is premature camshaft wear on early builds, with elevated incidence in high-mileage vehicles. PSA internal reports from 2007 noted a significant number of pre-2007 engines requiring camshaft replacement before 150,000 km, while UK DVSA MOT records show timing belt neglect as a frequent cause of engine failure. Extended service intervals and short-trip driving increase wear risk, making adherence to maintenance schedules critical.
Analysis derived from PSA technical bulletins (2004-2012) and UK DVSA failure statistics (2006-2016). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN EW7J4.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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