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 (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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
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.
Yes, the DW10CTED4 responds well to ECU remapping, with stage 1 tunes typically adding +25–35 kW safely. The Bosch EDC17 ECU is widely supported. However, increased torque can accelerate HPFP and turbo wear, so supporting modifications are recommended for sustained performance.
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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