The Peugeot XFZ (ES9J4) is a 2,946 cc, V6 naturally aspirated petrol engine produced between 2000 and 2010. It features double overhead camshafts (DOHC), 24 valves, and sequential multi — point fuel injection. In standard form, it delivered 155 kW (211 PS) and 290 Nm of torque, engineered for smooth, refined power delivery ideal for executive sedans and coupes.
Fitted to models such as the 406, 607, and 807, the XFZ engine was designed for effortless motorway cruising and a p…
Production years 2000–2010 meet Euro 3 standards .
The Peugeot XFZ (ES9J4) is a 2,946 cc V6 naturally aspirated petrol engine engineered for executive sedans and MPVs (2000-2010). It combines DOHC 24-valve architecture with sequential multi-point injection to deliver smooth, linear power. Designed to meet Euro 3 standards, it prioritizes refinement and effortless 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) @ 6,000 rpm | |
Torque | 290 Nm @ 3,750 rpm | |
Fuel system | Sequential multi-point injection (SAGEM) | |
Emissions standard | Euro 3 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | Peugeot 9736.10 (SAE 5W‑40) | |
Dry weight | 172 kg |
The Peugeot XFZ (ES9J4) was used across Peugeot's PF3 platform with transverse mounting. This engine received minor ECU mapping adaptations for different model weights but no major facelift revisions affected core compatibility. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The XFZ is a smooth and powerful engine, but its long-term reliability hinges on addressing the plastic inlet manifold issue. Once replaced with the metal version, and with regular oil changes using the correct 5W-40, these engines can reliably exceed 200,000 km. Ignition coils and variable intake actuators are common wear items.
The most critical issue is the plastic inlet manifold cracking and leaking coolant into the intake. Other common problems include failing ignition coils causing misfires, malfunctioning variable intake manifold actuators leading to power loss, and leaking valve cover gaskets. These are well-documented in Peugeot service bulletins.
The XFZ engine was primarily used in the Peugeot 406 (2000-2004), 607 (2000-2010), and 807 (2002-2010). It was also shared with Citroën, appearing in the C8 (2002-2010) MPV as the V6 2.9i. It's a transverse-mounted engine for front-wheel-drive platforms.
Modest gains are possible. An ECU remap can yield around +15-20 kW by optimizing ignition and fuel maps. More significant power requires hardware like performance cams, exhaust, and intake, which is costly. The engine responds well to tuning but is better suited to refinement than extreme power.
Fuel economy is typical for a 3.0L V6 of its era. In a Peugeot 607 V6, expect around 12.5 L/100km in the city and 7.5 L/100km on the highway, averaging approximately 25-30 mpg UK combined. Real-world figures vary significantly with driving style.
Yes. The XFZ is an interference engine. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the timing chain is very durable and rarely fails if oil is changed regularly.
Peugeot mandates oil meeting their 9736.10 specification, typically a 5W-40 synthetic or semi-synthetic. Using the correct oil is important for engine longevity, particularly for protecting the timing chain and valvetrain. Always check the oil cap or owner's manual for the exact specification.
Comprehensive technical documentation and regulatory references
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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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