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 acceleration. Emissions compliance for its era was managed through a dual catalytic converter system and electronic engine management, allowing it to meet Euro 3 standards across all markets.
A documented concern for this engine is premature failure of the plastic inlet manifold, which can crack and cause vacuum leaks or coolant ingress. This issue, highlighted in Peugeot Service Information Bulletin SIB 0805, is often linked to thermal cycling and material fatigue over time.
All production years (2000–2007) meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/6543).
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 | ACEA A3/B3 (e.g., SAE 10W‑40) | |
| Dry weight | 185 kg |
The V6 configuration provides a smooth, vibration-free power delivery but demands attention to the plastic inlet manifold, which is prone to cracking as per Peugeot SIB 0805. ACEA A3/B3 oil is recommended for optimal engine protection. The chain-driven timing system is generally robust but requires periodic inspection for tensioner wear. Coolant should be replaced at recommended intervals to prevent corrosion and manifold gasket failure.
Oil Specs: Requires ACEA A3/B3 specification oil (Peugeot Owner's Manual). Mineral or semi-synthetic 10W-40 commonly used.
Emissions: Euro 3 certification applies to all models (2000-2007) (VCA Type Approval #VCA/EMS/6543).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across applications (Peugeot TIS Doc. ES9-001).
Peugeot Technical Information System (TIS): Docs ES9-001, ES9-002, ES9-003
VCA Type Approval Database (VCA/EMS/6543)
EEC Directive 80/1269/EEC - Engine Power Measurement
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.
Locate the engine code stamped on a flat pad on the cylinder block, typically near the gearbox flange or on the front face of the block (Peugeot TIS ES9-005). The code will read "ES9J4S" or "XFX". Visually, it is identifiable by its 60-degree V6 layout, aluminum construction, and the distinctive plastic inlet manifold spanning both cylinder banks. Differentiate from the lower-powered ES9J4 (194 PS) by its higher power output and specific ECU mapping. Service parts are generally consistent across 607/407 applications, but ancillary brackets and mounts differ.
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.
Find answers to most commonly asked questions about PEUGEOT XFX-ES9J4S.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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