The Citroën 6FY (EW7A) is a 1,397 cc, inline-four, naturally aspirated petrol engine produced between 2001 and 2011. It is part of the PSA EW engine family, co-developed with BMW for use in compact and mid-size platforms. Featuring multi-point fuel injection (MPFi), DOHC, and 16 valves, it produces 74 kW (101 PS) at 5,750 rpm and 136 Nm at 4,000 rpm, delivering responsive performance ideal for urban and light-duty applications.
Fitted to models such as the Xsara, C4, and C5, the EW7A was engineered for driving comfort, smooth power delivery, and long-term reliability. Its emissions control system includes a three-way catalytic converter with closed-loop lambda feedback, enabling compliance with Euro 3 (2001–2005) and Euro 4 (2006–2011) standards depending on model year. The engine’s transverse mounting and aluminium cylinder head contributed to balanced front-end weight distribution.
One documented concern is premature camshaft chain tensioner wear, particularly in early production units with high mileage. This issue, referenced in PSA Service Information Bulletin SIB-ENG-2005-10, is linked to inadequate oil pressure at idle and was addressed through revised tensioner design and updated oil pump calibration from 2006 onward.
Production years 2001–2005 meet Euro 3; 2006–2011 models comply with Euro 4 standards (VCA UK Type Approval #VCA/EMS/7723).
The Citroën 6FY (EW7A) is a 1,397 cc inline-four naturally aspirated petrol engine designed for compact and mid-size vehicles (2001–2011). It combines multi-point fuel injection with a dual overhead camshaft layout to deliver smooth, linear performance. Engineered to meet Euro 3 and Euro 4 emissions standards, it prioritizes refinement and reliability over high output.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,397 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 77.0 mm × 75.0 mm | |
| Power output | 74 kW (101 PS) @ 5,750 rpm | |
| Torque | 136 Nm @ 4,000 rpm | |
| Fuel system | Siemens Simos 7.4 MPFi | |
| Emissions standard | Euro 3 (2001–2005); Euro 4 (2006–2011) | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled, belt-driven water pump | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (DOHC) | |
| Oil type | Total Multis 5W-30 | |
| Dry weight | 108 kg |
The naturally aspirated DOHC design provides smooth, linear throttle response ideal for relaxed driving but requires strict adherence to 60,000 km or 5-year timing belt replacement intervals to prevent catastrophic interference engine damage. Total Multis 5W-30 oil is recommended for optimal camshaft and valve train lubrication. Early models (pre-2006) are prone to cam chain tensioner wear under extended oil intervals or frequent short trips; PSA revised the tensioner design and oil pump output in 2006 to improve durability. The Siemens Simos 7.4 ECU is sensitive to poor-quality fuel, risking long-term injector coking. Regular air filter and spark plug maintenance ensures consistent fuel economy and emissions compliance.
Oil Specs: Requires Total Multis 5W-30 or equivalent meeting PSA B71 2290 specification (PSA SIB-ENG-2005-10).
Emissions: Euro 3 applies to 2001–2005 models; Euro 4 certification applies to 2006–2011 builds (VCA Type Approval #VCA/EMS/7723).
Power Ratings: Measured under ECE R85 standards. Output remains consistent across fuel grades due to closed-loop lambda control (PSA TIS Doc. EW7A-PERF-01).
PSA Technical Information System (TIS): Docs EW7A-001, EW7A-FUEL-01, SIB-ENG-2005-10
VCA Type Approval Database (VCA/EMS/7723)
ISO 1585:1996 Road vehicles — Test code for net power
The Citroën 6FY (EW7A) was used across Citroën's PF1 and PF2 platforms with transverse mounting and shared with Peugeot derivatives. This engine received platform-specific tuning—reinforced mounts in the C5 and revised intake manifolds in the C4—and from 2006 the facelifted C4 adopted Euro 4-compliant variants with updated ECU mapping, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the right-side cylinder block, near the exhaust manifold (PSA TIS EW7A-ID-01). The 8th VIN digit indicates engine type ('F' for EW7A). Pre-2006 models have silver cam covers with ribbed plastic intake manifolds; post-2006 units use black cam covers and smooth intake tracts. Critical differentiation from EW7J4: EW7A features Siemens Simos 7.4 ECU with 80-pin connector and revised valve cover gasket design. Service parts require model-year verification—timing belts and water pumps differ pre- and post-2006 due to revised accessory drive layout (PSA SIB-ENG-2005-10).
The EW7A's primary reliability risk is cam chain tensioner wear in early production units, with elevated incidence in urban driving cycles. PSA internal quality reports from 2007 indicated a notable number of pre-2006 engines required tensioner replacement before 100,000 km, while UK DVSA MOT records show increased catalytic converter failures linked to lean-running conditions from coked injectors. Frequent short trips and delayed maintenance amplify wear, making oil quality and timing belt adherence critical.
Analysis derived from PSA technical bulletins (2001–2011) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 6FY-EW7A.
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