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…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The DW10UTD is generally reliable when maintained properly. Key risks include DPF clogging in pre-2008 models and EGR valve sticking. Using correct oil (PSA B71 2300) and performing regular highway drives to maintain DPF regeneration helps prevent issues. Well-maintained engines can exceed 180,000 km without major repairs.
Primary issues include DPF clogging (especially pre-2008), timing belt failure, EGR valve coking, and turbo actuator sticking. These are documented in PSA service bulletins. Regular maintenance—especially timing belt changes and DPF regeneration—significantly reduces failure risk.
The DW10UTD was used in the Citroen C5 (2004–2011), C4 (2004–2010), and shared with Peugeot 407 (2004–2010) and 607 (2004–2009). It was phased out in favor of the newer HDi engines with SCR. Production spanned from 2004 to 2011, primarily in Euro 4-compliant mid-size sedans and estates.
Yes. The DW10UTD responds well to ECU remapping, with stage 1 tunes typically adding +20–25 kW. The turbo and internals are robust, but supporting mods (intercooler, exhaust) are recommended for higher outputs. Tuning should be performed by specialists familiar with HDi engine dynamics to avoid over-boosting or DPF interference.
In combined driving, expect 5.2–5.8 L/100km (49–54 mpg UK). The C5 2.0 HDi averages ~5.5 L/100km in mixed use. Real-world economy depends on driving style—aggressive use can exceed 7.0 L/100km. Highway cruising is more efficient, often achieving 4.6–5.0 L/100km.
Yes. The DW10UTD is an interference engine. If the timing belt fails or jumps, the pistons can strike the open valves, causing severe internal damage. The timing belt must be replaced every 60,000 km or 4 years—ignoring this risks catastrophic engine failure.
PSA specifies SAE 5W-30 oil meeting PSA B71 2300 standard. This mineral-based oil ensures proper turbocharger and EGR system lubrication while protecting the DPF. Oil changes should be performed every 15,000 km or annually to maintain engine longevity.
Comprehensive technical documentation and regulatory references
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CITROEN 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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