The Citroën DW10CTED4 is a 1,997 cc, inline — four turbocharged diesel engine produced between 2008 and 2018. Part of PSA's HDi engine family, it features a cast — iron block, aluminium head, and common — rail direct injection. Delivering 103 kW (140 PS) at 4,000 rpm and 340 Nm of torque at 1,750 rpm, the DW10CTED4 was engineered for responsive mid — range performance and motorway efficiency.
Fitted to models such as the C5, C6, and DS5, the DW10CTED4 was designed for executive c…
All models meet Euro 5 standards; select 2014–2018 variants achieve Euro 6b compliance depending on market (VCA UK Type Approval #VCA/EMS/7531).
The Citroën DW10CTED4 is a 1,997 cc inline-four turbocharged diesel engine developed for executive and premium vehicles (2008–2018). It combines common-rail injection with a variable-geometry turbocharger and SCR emissions control to deliver refined performance and regulated compliance. Designed to meet Euro 5 and later Euro 6b standards, it balances drivability with environmental requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Diesel (Ultra-low sulfur, EN 590 compliant) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (variable geometry) | |
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 2-20 common-rail (up to 1,800 bar) | |
Emissions standard | Euro 5 (2008–2018); Euro 6b (select 2014+ models) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Garrett GT1749V variable geometry turbo (VGT) | |
Timing system | Timing belt (renew every 150,000 km or 7 years) | |
Oil type | PSA B71 2310 (SAE 5W-30) | |
Dry weight | 172 kg |
The Citroën DW10CTED4 was used across Citroën's executive and premium platforms with transverse mounting and shared architecture with Peugeot. This engine received platform-specific calibrations-torque tuning in the DS5 HYbrid4 and revised intake manifolds in the C6-and from 2014 the facelifted C5 adopted the DW10B variant with enhanced SCR control, creating interchange limits. Partnerships enabled Ford to use a modified version in the Mondeo (2010–2014) with different ECU mapping. All adaptations are documented in OEM technical bulletins.
The DW10CTED4's primary reliability risk is high-pressure fuel pump failure on early builds, with elevated incidence in vehicles operated on low-quality diesel. Internal PSA quality reports from 2013 noted a significant share of pre-2012 engines requiring HPFP replacement before 150,000 km, while UK DVSA records link a notable portion of emissions-related MOT failures to EGR clogging in stop-start conditions. Infrequent servicing and short-trip driving increase DPF and EGR stress, making adherence to 15,000 km oil changes and periodic regeneration critical.
Analysis derived from PSA technical bulletins (2008-2018) and UK DVSA failure statistics (2010-2022). 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 offers good performance and efficiency, but early models (2008-2011) had reliability concerns, particularly high-pressure fuel pump failures. Later revisions (post-2012) improved pump durability and fuel filtration, so well-maintained examples can exceed 250,000 km. Regular servicing with PSA B71 2310 oil and adherence to 15,000 km intervals greatly enhance longevity.
The most documented issues are high-pressure fuel pump failure, EGR valve clogging, DPF regeneration problems, and AdBlue/SCR system faults. These are confirmed in PSA service bulletins and technical reports. Fuel quality, oil maintenance, and driving patterns significantly influence reliability, especially for emissions components.
The DW10CTED4 was used in the Citroën C5, C6, and DS5 from 2008 to 2018. It was also shared with Peugeot (508) and Ford (Mondeo 2.0 TDCi) under different designations. Output is consistently 140 PS across applications. Emissions standards range from Euro 5 to Euro 6b depending on model year and market.
Yes. The DW10CTED4 responds well to ECU remapping, with stage 1 tunes typically adding +30–40 kW. Stock internals are robust up to ~180 PS with supporting mods (intercooler, exhaust). However, over-tuning increases stress on the fuel pump and turbo, so upgrades should be matched to driving conditions and maintenance practices.
Very good for its class. In a C5 2.0 HDi 140, combined consumption is ~5.1 L/100km (55 mpg UK). City driving may see 6.0–6.5 L/100km (43–47 mpg), while highway runs can achieve ~4.6 L/100km (61 mpg). Real-world figures depend on driving style, but it remains one of the most efficient executive diesel engines of its era.
Yes. The DW10CTED4 is an interference engine. If the timing belt fails or skips, piston-to-valve contact will occur, resulting in severe internal damage. While belt life is rated to 150,000 km, any abnormal noise from the front cover should be investigated immediately to prevent catastrophic failure.
PSA specifies a 5W-30 synthetic oil meeting PSA B71 2310 (or newer) specification. This oil is critical for turbo bearing lubrication and high-pressure fuel pump protection. Oil changes should be performed every 15,000 km or annually to maintain engine health and prevent sludge or coking.
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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