The Citroen RHV (DW10UTD) is a 1,997 cc, inline-four turbocharged diesel engine produced between 2004 and 2011 as part of PSA Peugeot Citroën's DW engine family. It features a dual overhead camshaft (DOHC), 16-valve configuration, and high-pressure common-rail direct injection, delivering 80 kW (109 PS) at 3,500 rpm with 250 Nm of torque available from 1,750 rpm. This engine combines responsive performance with fuel efficiency for mid-size vehicles.
Fitted to models such as the Citroen C5, C4, and Peugeot 407, the DW10UTD was engineered for smooth highway cruising and dependable everyday driving. Emissions compliance was achieved through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), enabling Euro 4 compliance across its production run. The longitudinal mounting and front-wheel-drive layout made it ideal for PSA’s C-segment platforms.
One documented concern is DPF clogging due to incomplete regeneration cycles, particularly in vehicles subjected to frequent urban driving or short trips. This issue, referenced in PSA Service Information Bulletin SIB-ENG-010-09, is linked to insufficient exhaust temperatures preventing passive regeneration. From 2008, revised ECU mapping and enhanced regeneration logic were introduced to improve DPF longevity and reduce fault frequency.
All production years 2004–2011 meet Euro 4 emissions standards (VCA UK Type Approval #VCA/EMS/5432).
The Citroen RHV (DW10UTD) is a 1,997 cc inline-four turbocharged diesel engine developed for mid-size sedans and estates (2004–2011). It uses common-rail injection and a DOHC 16-valve layout to deliver balanced performance and economy. Engineered to meet Euro 4 standards, it prioritizes refinement, reliability, and emissions compliance in mainstream applications.
| 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 | 80 kW (109 PS) @ 3,500 rpm | |
| Torque | 250 Nm @ 1,750–2,500 rpm | |
| Fuel system | Common-rail direct injection (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Fixed geometry turbo (Garrett GT1749V) | |
| Timing system | Timing belt (DOHC) | |
| Oil type | PSA B71 2300 (SAE 5W-30) | |
| Dry weight | 147 kg |
The fixed geometry turbo provides reliable low-RPM torque ideal for mixed driving but requires strict adherence to 60,000 km or 4-year timing belt replacement intervals to prevent valve damage. PSA B71 2300 (5W-30) oil is recommended for optimal turbo and DPF system longevity. Regular highway runs (20+ minutes above 3,000 rpm) are essential to maintain DPF regeneration cycles and prevent EGR-related faults. Post-2008 models benefit from improved ECU mapping and revised regeneration strategy, reducing DPF clogging risk. Avoid prolonged idling to minimize soot accumulation.
Oil Specs: Requires PSA B71 2300 (5W-30) specification (PSA SIB-ENG-010-09). Compatible with ACEA B4.
Emissions: Euro 4 certification applies to all models (2004–2011) (VCA Type Approval #VCA/EMS/5432).
Power Ratings: Measured under ISO 1585 standards. Output assumes clean air filter, correct injection timing, and EN 590 diesel (PSA TIS Doc. B31630).
PSA Technical Information System (TIS): Docs B31030, B31280, B31431, SIB-ENG-010-09
VCA Type Approval Database (VCA/EMS/5432)
ISO 1585 Road vehicles — Test method for the measurement of fuel consumption
The Citroen RHV (DW10UTD) was used across Citroen's C4/C5 platforms with longitudinal mounting and shared with Peugeot under PSA Group commonality agreements. This engine received platform-specific calibrations—slightly tuned throttle response in the C5 and revised torque delivery in the C4—and from 2008 the updated C5 adopted a redesigned ECU map and updated DPF regeneration logic, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block near the oil filter housing (PSA TIS B31030). The 8th VIN digit indicates engine type ('L' for DW10 series). Pre-2008 models have a silver EGR valve housing with single coolant hose; post-2008 units feature a black housing with dual cooling lines. Critical differentiation from DW10ATED: DW10UTD lacks SCR/AdBlue system. Service parts require model-year verification—DPF assemblies and EGR valves for pre-2008 models are not compatible with later revisions due to updated regeneration logic and sensor integration (PSA SIB-ENG-010-09).
The DW10UTD's primary reliability risk is DPF clogging, with elevated incidence in vehicles subjected to frequent short trips. Internal PSA field reports from 2010 indicated a significant number of pre-2008 units required DPF cleaning or replacement before 100,000 km, while UK DVSA data links a portion of emissions-related failures to EGR system faults. Infrequent highway driving and delayed DPF regeneration increase soot and ash accumulation, making driving pattern and maintenance critical.
Analysis derived from PSA technical bulletins (2005–2011) and UK DVSA failure statistics (2005–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN RHV-DW10UTD.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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