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 e…
Production years 2008–2016 meet Euro 5 standards .
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 178 kg |
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.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The DW10CTED4 is generally robust when maintained properly, but pre-2012 models are prone to HPFP failure if low-quality fuel is used. Timing belt integrity is critical due to interference design. With regular service, use of EN 590 diesel, and timely belt changes, these engines can exceed 300,000 km reliably.
Key issues include high-pressure fuel pump wear, timing belt failure (due to missed intervals), EGR/intake carbon buildup, and DPF clogging from short journeys. These are documented in PSA service bulletins, particularly SIB-DIESEL-2011-07 and SIB-ENGINE-2009-03.
The DW10CTED4 was used in the Citroën C5 (2008–2016), C6 (2008–2012), and Relay (2008–2014). It was also shared with Peugeot 508 and Fiat Ducato under PSA-Fiat partnerships. All variants produce 103 kW (140 PS) and meet Euro 5 standards.
Aftermarket ECU tuning is common on the DW10CTED4 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In the C5 2.0 HDi, combined consumption is approximately 5.2 L/100 km (~54 mpg UK). Highway driving can achieve 4.6 L/100 km (~61 mpg), while city use may rise to 6.5 L/100 km (~43 mpg). Real-world economy depends on driving style and DPF regeneration frequency.
Yes, the DW10CTED4 is an interference engine. If the timing belt fails, pistons will strike open valves, causing severe internal damage. Adherence to the 180,000 km or 10-year replacement interval is absolutely essential to prevent costly engine repairs.
PSA specifies Total Quartz INEO ECS 5W-30 (B71 2290), a low-SAPS oil designed to protect the DPF and EGR systems. Oil changes should occur every 15,000–20,000 km or annually. Using incorrect oil can accelerate DPF clogging and reduce component lifespan.
Comprehensive technical documentation and regulatory references
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EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
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