The Peugeot RLZ (EW10D) is a 1,997 cc, inline‑four petrol engine produced between 2001 and 2007. It features a cast — iron block, aluminum cylinder head, and a twin — cam (DOHC) 16 — valve configuration with multi — point fuel injection. This engine delivered 100 kW (136 PS) and 190 Nm of torque, offering a refined blend of performance and everyday drivability.
Fitted primarily to the 307, 406, and 607 models, the RLZ was engineered for smooth, responsive power delivery and com…
All production years (2001–2007) meet Euro 3 standards .
The Peugeot RLZ (EW10D) is a 1,997 cc inline‑four petrol engine engineered for compact and mid‑size models (2001-2007). It combines DOHC 16-valve architecture with multi-point fuel injection to deliver smooth, linear power and strong mid-range torque. Designed to meet Euro 3 standards, it prioritizes refinement and reliability for daily use.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 100 kW (136 PS) | |
Torque | 190 Nm @ 4,000 rpm | |
Fuel system | Multi-point fuel injection (Bosch Motronic) | |
Emissions standard | Euro 3 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven with variable valve timing (VVT) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 142 kg |
The Peugeot RLZ (EW10D) was used across Peugeot's 307/406 platforms with transverse mounting. This engine received minor platform-specific adaptations-different engine mounts and ancillary layouts between the 307 and 406-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 RLZ's primary reliability risk is dephaser pulley failure, often linked to oil quality or extended service intervals. Peugeot SIB 0912 documents this issue, while owner club data suggests a correlation between neglected maintenance and timing-related engine damage. Adherence to strict oil and belt service intervals is critical for long-term reliability.
Analysis derived from Peugeot technical bulletins (2001-2007) 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 RLZ is generally reliable with proper maintenance. Its main vulnerabilities are the dephaser pulley and timing belt. Using the correct ACEA A3/B3 oil, adhering to strict 60,000 km service intervals for the belt and dephaser, and regular oil changes are essential for achieving high mileage without major issues.
The most critical issue is dephaser pulley failure, often accompanied by timing belt wear. Other common problems include coolant leaks from the water pump or hoses and ignition coil failures causing misfires. These are well-documented in Peugeot service literature, particularly SIB 0912 for the dephaser.
This 2.0L 16-valve petrol engine was used in the Peugeot 307 (2001-2007), 406 (2001-2004), and 607 (2001-2004) models. It was typically found in mid-to-high trim variants like the XR, SRi, and Executive, providing a good balance of power and refinement.
Limited potential. Power gains are possible by remapping the ECU and installing a performance exhaust, yielding perhaps +10-15 kW. However, the engine's naturally aspirated design and age limit significant gains. More extensive modifications are generally not cost-effective.
Reasonable for its era. Expect around 9.0-10.0 L/100km (31-28 mpg UK) in mixed driving for a 307, and potentially 7.5-8.5 L/100km (38-33 mpg UK) on steady highway runs. Its efficiency is adequate, though not class-leading.
Yes. This is critically important. If the timing belt breaks or slips, the pistons will collide with the open valves, causing severe internal engine damage that requires a costly rebuild. Never exceed the 60,000 km service interval for the belt.
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, critically, for the proper operation of the hydraulic dephaser pulley.
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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