The Peugeot RHA (DW10CTED4) is a 1,997 cc, inline‑four turbo‑diesel engine produced between 2010 and 2018. It features a cast iron block, aluminium cylinder head, and a dual overhead camshaft (DOHC) 16-valve layout with a variable geometry turbocharger. Output ranges from 110 kW (150 PS) to 120 kW (163 PS), with torque figures of 340–370 Nm, providing strong low-end pull for its applications.
Fitted to models such as the 308, 508, and 3008, the RHA was engineered for refined performance and long-distance efficiency. It offered a balance of responsive power delivery and fuel economy, making it suitable for both urban and motorway driving. Emissions compliance for these units met Euro 5 standards, achieved through a high-pressure common rail injection system, exhaust gas recirculation (EGR), and a diesel particulate filter (DPF).
One documented reliability concern is premature failure of the high-pressure fuel pump, often linked to fuel contamination or extended service intervals. This issue is referenced in PSA service documentation, which recommends strict adherence to fuel quality and maintenance schedules. Later production runs incorporated revised pump internals to improve durability.
Production years 2010–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/2345).
The Peugeot RHA (DW10CTED4) is a 1,997 cc inline‑four turbo‑diesel engineered for mid-size hatchbacks and SUVs (2010-2018). It combines a high-pressure common rail fuel system with a variable geometry turbocharger to deliver strong low-rpm torque and efficient cruising. Designed to meet Euro 5 standards, it balances performance with emissions compliance.
| 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 | 110–120 kW (150–163 PS) | |
| Torque | 340–370 Nm @ 2,000 rpm | |
| Fuel system | High-pressure common rail (Bosch CP4.2, up to 1,800 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable geometry turbo (VGT) | |
| Timing system | Chain-driven | |
| Oil type | PSA B71 2290 (SAE 5W‑30) | |
| Dry weight | 145 kg |
The VGT turbo provides strong low-RPM torque ideal for overtaking and towing but requires strict adherence to 20,000 km oil change intervals to prevent chain wear and turbo degradation. PSA B71 2290 (5W-30) oil is critical for protecting the high-pressure fuel pump and timing chain. Fuel quality is paramount; contaminated or low-grade diesel can rapidly destroy the Bosch CP4.2 pump. EGR and DPF systems require periodic cleaning to maintain emissions compliance and prevent limp-mode events. The timing chain is designed for life but should be inspected for noise or wear during major services.
Oil Specs: Requires PSA B71 2290 specification (5W-30) (PSA Service Bulletin SB-12-08). ACEA C2 or C3 oils are suitable equivalents.
Emissions: Euro 5 certification applies to all production years (VCA Type Approval #VCA/EMS/2345).
Power Ratings: Measured under ISO 1585 standards. Output varies by model application and ECU mapping (PSA Group PT-2015).
PSA Technical Repair Manuals: RM-5432, RM-6543
PSA Electronic Technical Catalogue (ETK): Doc. DW10-6789
VCA Type Approval Database (VCA/EMS/2345)
The Peugeot RHA (DW10CTED4) was used across Peugeot's mid-size platforms with transverse mounting. This engine received minor ECU and accessory drive adaptations between the 308 and 508 applications. 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. The RHA code is specific to the 150-163 PS variants of the DW10 engine family. Visually, it can be identified by its black plastic inlet manifold and the "HDi" badge on the cam cover. Critical differentiation from the lower-powered DW10ATED (RHZ): RHA has a different turbocharger and higher fuel pressure. Service parts, particularly the fuel pump and injectors, are not always interchangeable with other DW10 variants (PSA Repair Manual RM-5432).
The RHA's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel or exceeding service intervals. PSA internal service data indicates this was a notable concern for units with inconsistent maintenance, while DPF clogging remains a critical, preventable risk for urban-driven vehicles. Neglecting fuel quality or service schedules makes catastrophic engine damage highly probable.
Analysis derived from PSA technical bulletins (2010-2018) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT RHA-DW10CTED4.
Comprehensive technical documentation and regulatory references
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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
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