The Peugeot XFX (ES9J4S) is a 2,946 cc, V6 petrol engine produced between 2000 and 2007. It features an aluminum block and heads, a 24 — valve configuration with dual overhead camshafts per bank, and multi — point fuel injection. This engine delivered 155 kW (211 PS) and 285 Nm of torque, offering smooth, refined power for executive applications.
Fitted primarily to the 607 and 407 models, the XFX was engineered for quiet, effortless cruising and strong mid — range accelerati…
All production years (2000–2007) meet Euro 3 standards .
The Peugeot XFX (ES9J4S) is a 2,946 cc V6 petrol engine engineered for executive sedans (2000-2007). It combines a DOHC 24-valve architecture with multi-point fuel injection to deliver smooth, linear power and a refined driving experience. Designed to meet Euro 3 standards, it prioritizes comfort and performance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,946 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 90.0 mm × 77.0 mm | |
Power output | 155 kW (211 PS) | |
Torque | 285 Nm @ 3,750 rpm | |
Fuel system | Multi-point fuel injection (Bosch Motronic) | |
Emissions standard | Euro 3 | |
Compression ratio | 10.6:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 185 kg |
The Peugeot XFX (ES9J4S) was used across Peugeot's 607/407 platforms with longitudinal mounting. This engine received minor platform-specific adaptations-different engine mounts and ancillary layouts between the 607 and 407-but no major facelift revisions affecting core compatibility during its production run. All adaptations are documented in OEM technical bulletins.
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The XFX's primary reliability risk is inlet manifold failure, often linked to thermal stress and material fatigue. Peugeot SIB 0805 documents this issue, while owner club data suggests a correlation between neglected coolant maintenance and premature manifold cracking. Adherence to strict coolant replacement intervals is critical for long-term reliability.
Analysis derived from Peugeot technical bulletins (2000-2007) and aggregated owner club failure reports. 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 XFX V6 is a smooth and powerful engine, but its main vulnerability is the plastic inlet manifold, which can crack over time. With strict adherence to coolant replacement intervals and prompt replacement of the manifold if issues arise (per SIB 0805), along with regular oil changes, it can provide many years of reliable service.
The most critical issue is cracking of the plastic inlet manifold, leading to coolant leaks or vacuum issues. Other common problems include coolant leaks from associated hoses and gaskets, ignition coil failures causing misfires, and oil leaks from the valve cover gaskets. These are well-documented in Peugeot service literature, particularly SIB 0805 for the manifold.
This 3.0L V6 petrol engine was used in the Peugeot 607 (2000-2007) and 407 (2004-2007) models. It was typically found in the top-tier Executive and GT variants, providing a refined and powerful driving experience for Peugeot's flagship sedans.
Limited potential. Power gains are possible by remapping the ECU and installing a performance exhaust, yielding perhaps +15-25 kW. However, the engine's naturally aspirated design and age limit significant gains. More extensive modifications are generally not cost-effective and can stress the aging components.
As expected for a large V6, economy is not its strength. Expect around 11.0-12.5 L/100km (26-23 mpg UK) in mixed driving for a 607 or 407, and potentially 9.0-10.0 L/100km (31-28 mpg UK) on steady highway runs. Its focus is on refinement and power, not efficiency.
Yes. If the timing chain fails or jumps, the pistons will collide with the valves, causing severe internal engine damage. While the chain is generally robust, any unusual noise from the timing cover should be investigated immediately.
A quality 10W-40 semi-synthetic or synthetic oil meeting ACEA A3/B3 specifications is recommended. Regular oil changes (every 10,000-15,000 km) are crucial for engine longevity and performance.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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