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,…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The RHZ can be reliable long-term if meticulously maintained. The critical factors are using ultra-low sulfur diesel (EN 590), changing the oil every 20,000 km with ACEA B4 specification, and ensuring the DPF regenerates regularly through highway driving. Addressing fuel pump issues promptly is key to avoiding expensive failures.
The most common issues are premature high-pressure fuel pump failure, DPF clogging due to incomplete regeneration, EGR valve clogging, and turbocharger wastegate sticking. These are well-documented in Peugeot service information and are typical of Euro 4 diesel engines.
The RHZ engine was used in the Peugeot 307 (2006-2010), 407 (2006-2010), and Partner van (2006-2010) in their 2.0 HDi 136 trims. It was also fitted to the Citroën C5 (2006-2010) and other PSA Group vehicles sharing the DW10 platform.
Yes, the RHZ responds well to tuning. A stage 1 ECU remap can safely increase power to around 120 kW (163 PS) and torque to 380 Nm. More advanced tuning involves a larger intercooler and upgraded turbo. The bottom end is robust, but ensure the fuel system is in good health before tuning.
Fuel economy is excellent for its performance. In a Peugeot 307 2.0 HDi, expect around 7.0 L/100km in the city and 5.0 L/100km on the highway, translating to roughly 48 mpg UK combined. Actual figures depend heavily on driving style and ensuring the DPF regenerates properly.
Yes. The RHZ is an interference engine. If the timing chain were to fail (though it is designed to be maintenance-free), the pistons would collide with the open valves, causing significant internal engine damage. This underscores the importance of using the correct oil to ensure chain longevity.
Peugeot mandates an oil meeting the ACEA B4 specification. A 5W-40 viscosity is recommended. Using a high-quality, fully synthetic oil that meets this spec is crucial for engine protection and ensuring longevity, especially given the engine's performance orientation.
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
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
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