The Citroën DW12UTED is a 2,179 cc, inline — four turbocharged diesel engine produced between 2004 and 2011. Part of PSA's HDi engine family, it features a cast — iron block, aluminium head, and common — rail direct injection. Delivering 100 kW (136 PS) at 4,000 rpm and 310 Nm of torque at 1,750 rpm, the DW12UTED was engineered for strong mid — range performance and refined driving dynamics.
Fitted to models such as the C5, C8, and Peugeot 807, the DW12UTED was designed for execut…
All models meet Euro 4 standards; select 2008–2011 variants may achieve Euro 5 depending on market (VCA UK Type Approval #VCA/EMS/6241).
The Citroën DW12UTED is a 2,179 cc inline-four turbocharged diesel engine developed for executive and large MPV platforms (2004–2011). It combines common-rail injection with a variable-geometry turbocharger to deliver strong torque and smooth operation. Designed to meet Euro 4 standards, with some models achieving Euro 5, it balances performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,179 cc | |
Fuel type | Diesel (Ultra-low sulfur, EN 590 compliant) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (variable geometry) | |
Bore × stroke | 89.0 mm × 88.0 mm | |
Power output | 100 kW (136 PS) @ 4,000 rpm | |
Torque | 310 Nm @ 1,750 rpm | |
Fuel system | Bosch CRS 2-18 common-rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (2004–2011); Euro 5 (select 2008+ models) | |
Compression ratio | 17.0:1 | |
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 | 180 kg |
The Citroën DW12UTED was used across Citroën's executive and large MPV platforms with transverse mounting and shared architecture with Peugeot. This engine received platform-specific calibrations-torque tuning in the C8 and revised intake manifolds in the C5-and from 2008 the facelifted C5 adopted the DW12TED4 variant with enhanced emissions control, creating interchange limits. Partnerships enabled Fiat to use a modified version in the Ulysse (2006–2011) with different ECU mapping. All adaptations are documented in OEM technical bulletins.
The DW12UTED'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 2008 noted a significant share of pre-2007 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 (2004-2011) and UK DVSA failure statistics (2007-2022). 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 DW12UTED offers good performance and efficiency, but early models (2004-2006) had reliability concerns, particularly high-pressure fuel pump failures. Later revisions (post-2007) 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 turbo actuator wear. 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 DW12UTED was used in the Citroën C5 and C8 from 2004 to 2011. It was also shared with Peugeot (807, 806) and Fiat (Ulysse 2.2 JTD) under different designations. Output is consistently 136 PS across applications. Emissions standards range from Euro 4 to Euro 5 depending on model year and market.
Yes. The DW12UTED responds well to ECU remapping, with stage 1 tunes typically adding +25–35 kW. Stock internals are robust up to ~170 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.
Good for its size. In a C5 2.2 HDi 136, combined consumption is ~6.2 L/100km (46 mpg UK). City driving may see 7.0–7.8 L/100km (36–40 mpg), while highway runs can achieve ~5.6 L/100km (50 mpg). Real-world figures depend on driving style, but it remains a capable performer for large vehicles.
Yes. The DW12UTED 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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CITROEN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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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