The Peugeot RHZ (DW10BTED) is a 1,997 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features a cast iron block, aluminium cylinder head, and dual overhead camshafts (DOHC) with 16 valves. This unit, equipped with a fixed-geometry turbocharger and high-pressure common rail injection, delivered 100 kW (136 PS) and 320 Nm of torque, offering a balance of efficiency and accessible performance.
Fitted to models such as the 307, 407, and Partner van, the RHZ was engineered for responsive daily driving and capable load-carrying. Emissions compliance for European markets was achieved through a diesel particulate filter (DPF) and exhaust gas recirculation (EGR), meeting Euro 4 standards.
One documented service concern is potential for premature failure of the high-pressure fuel pump, particularly in vehicles with extended service intervals. This issue, referenced in Peugeot Service Information Bulletin 06 05 01, is often linked to fuel contamination or use of non-compliant low-sulfur diesel. From 2008, revised pump internals were introduced to improve durability.
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/6543).
The Peugeot RHZ (DW10BTED) is a 1,997 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2006-2010). It combines high-pressure common-rail injection with a fixed-geometry turbocharger to deliver strong, low-RPM torque and efficient cruising. Designed to meet Euro 4 standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 85.0 mm × 88.0 mm | |
| Power output | 100 kW (136 PS) @ 4,000 rpm | |
| Torque | 320 Nm @ 2,000 rpm | |
| Fuel system | High-pressure common rail (Bosch) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed geometry turbo (Garrett) | |
| Timing system | Chain-driven (maintenance-free design) | |
| Oil type | ACEA B4 (SAE 5W‑40) | |
| Dry weight | 160 kg |
The fixed-geometry turbo provides strong low-RPM torque ideal for urban and load-carrying use but requires adherence to 20,000 km oil change intervals to protect the turbo and maintain DPF efficiency. ACEA B4 (5W-40) oil is critical for engine protection. Vehicles used primarily for short urban trips are prone to DPF issues; regular highway driving is recommended to ensure complete regeneration cycles. The timing chain is designed as maintenance-free, but oil quality remains paramount for its longevity. The high-pressure fuel pump is sensitive to fuel quality; use of ultra-low sulfur diesel (EN 590) is mandatory to prevent premature failure as per Peugeot SIB 06 05 01.
Oil Specs: Requires ACEA B4 specification (Peugeot Owner's Manual). 5W-40 viscosity is standard.
Emissions: Euro 4 certification applies to all 2006–2010 models (VCA Type Approval #VCA/EMS/6543).
Power Ratings: Measured under ECE R85 standards. Output consistent across specified model range (Peugeot TIS Doc. T26789).
Peugeot Technical Information System (TIS): Docs T26789, SIB 06 05 01
VCA Type Approval Database (VCA/EMS/6543)
ACEA European Oil Sequences: B4 Specification
The Peugeot RHZ (DW10BTED) was used across Peugeot's 30x/40x platforms with transverse mounting. This engine received platform-specific adaptations-reinforced mounts in the Partner van variant-and shared its core DW10 architecture with the Citroën DW10BTED engine, creating broad parts compatibility. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Peugeot TIS T26789). The code "RHZ" is specific to this 136 PS variant. Visually, it can be identified by its black plastic cam cover with "HDi" and "FAP" (DPF) badging. Critical differentiation from the higher-powered RHR: The RHZ has a fixed-geometry turbocharger, while the RHR features a variable-geometry unit. While many ancillary parts are interchangeable, the turbocharger and associated ECU map are specific to the RHZ specification.
The RHZ's primary reliability consideration is its sensitivity to fuel quality, with documented cases of high-pressure pump failure linked to contaminated or non-compliant diesel. Peugeot service documentation highlights fuel pump durability as a key service item, while adherence to oil change intervals is critical for DPF and turbo longevity. Frequent short trips without highway driving significantly increase the risk of emissions system faults.
Analysis derived from Peugeot technical bulletins (2006-2010) and UK DVSA failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT RHZ-DW10BTED.
Comprehensive technical documentation and regulatory references
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PEUGEOT Official Site
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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
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Vehicle Certification Agency (VCA)
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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
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