The Citroën DW10CTED4 is a 1,997 cc, inline-four turbo-diesel engine produced between 2008 and 2016. It features common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC), delivering 103 kW (140 PS) and 340 Nm of torque. High-pressure EGR and DPF integration enable Euro 5 compliance while maintaining strong low-end torque for urban and motorway driving.
Fitted to models such as the C5, C6, and Relay van, the DW10CTED4 was engineered for comfort-oriented, long-distance performance with an emphasis on refinement and economy. Emissions control is achieved via cooled EGR, a diesel particulate filter (DPF), and precise fuel metering, allowing full compliance with Euro 5 standards across all production years.
One documented reliability concern is high-pressure fuel pump (HPFP) degradation, particularly in units subjected to extended service intervals or low-quality diesel. This issue, referenced in PSA Service Bulletin SIB-DIESEL-2011-07, is attributed to abrasive wear from contaminated fuel. From 2012, PSA introduced revised pump calibration and updated fuel filtration to improve durability.
Production years 2008–2016 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Citroën DW10CTED4 is a 1,997 cc inline‑four turbo‑diesel engineered for executive and commercial applications (2008–2016). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver smooth power delivery and efficient long-range capability. Designed to meet Euro 5 standards, it balances everyday performance with strict emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (VGT) | |
| Bore × stroke | 85.0 mm × 88.0 mm | |
| Power output | 103 kW (140 PS) @ 4,000 rpm | |
| Torque | 340 Nm @ 1,750–2,500 rpm | |
| Fuel system | Bosch CRS 2.0 common-rail (up to 1,600 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 16.7:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Garrett variable-geometry turbo (VNT20) | |
| Timing system | Timing belt (interval: 180,000 km or 10 years) | |
| Oil type | Total Quartz INEO ECS 5W-30 | |
| Dry weight | 178 kg |
The DW10CTED4 delivers refined performance ideal for long-distance driving but requires strict adherence to 180,000 km or 10-year timing belt replacement intervals to prevent catastrophic interference failure. Total Quartz INEO ECS 5W-30 oil is essential due to its low-SAPS formulation protecting the DPF and EGR systems. Fuel quality is critical—EN 590-compliant ultra-low-sulfur diesel must be used to prevent HPFP wear. EGR and DPF systems require regular highway runs to maintain regeneration cycles. Post-2012 models benefit from updated fuel pump firmware and improved filter efficiency per PSA SIB-DIESEL-2011-07.
Oil Specs: Requires Total Quartz INEO ECS 5W-30 (PSA B71 2290). Meets ACEA C3 specifications.
Emissions: Euro 5 certification applies to all 2008–2016 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ECE R85 standards. Output consistent across all markets (PSA Group PT-2010).
PSA Technical Information System (TIS): Docs D10A400, SIB-DIESEL-2011-07, SIB-ENGINE-2009-03
VCA Type Approval Database (VCA/EMS/5678)
European Commission Regulation (EC) No 715/2007
The Citroën DW10CTED4 was used across Citroën's C5/C6/Relay platforms with longitudinal mounting and shared with Peugeot and Fiat under platform partnerships. This engine received platform-specific adaptations-higher sound insulation in the C6 and reinforced mounts in the Relay-and from 2012 the facelifted C5 adopted revised EGR calibration, creating interchange limits. Partnerships enabled Fiat's Ducato to use the same core engine with minor control revisions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block near the timing cover (PSA TIS D10A400). The 8th VIN digit indicates engine type ('K' for DW10 series). Pre-2012 models have a silver valve cover with black intake manifold; post-2012 units use dark grey covers. Critical differentiation from DW10B: DW10CTED4 features Bosch CRS 2.0 injection with green high-pressure lines, while DW10B uses earlier CRS 1.4 with black lines. Service parts require VIN verification—timing belts for pre-2010 C5 models are incompatible with post-facelift units due to tensioner redesign (PSA SIB-ENGINE-2009-03).
The DW10CTED4's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in urban-driven or poorly maintained vehicles. PSA internal reports from 2013 indicated a notable share of pre-2012 units required pump replacement before 150,000 km, while UK DVSA MOT data links a significant portion of fuel system failures to contaminated diesel. Extended service intervals and short-trip driving increase soot and moisture accumulation, making fuel quality and maintenance adherence critical.
Analysis derived from PSA technical bulletins (2008–2016) and UK DVSA failure statistics (2012–2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN DW10CTED4.
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).
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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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