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 executive comfort and towing capability. Emissions compliance was achieved through exhaust gas recirculation (EGR), diesel particulate filter (DPF), and oxidizing catalytic converter, allowing compliance with Euro 4 standards throughout its production run.
One documented reliability concern is high-pressure fuel pump (HPFP) wear due to inadequate lubrication from low-sulfur diesel. This issue, highlighted in PSA Service Bulletin SIB 13-TD-016, is linked to fuel quality sensitivity. From 2007, revised HPFP calibration and updated fuel filtration were introduced to improve durability across the fleet.
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 variable-geometry turbo provides strong low-RPM torque ideal for towing and motorway driving but requires adherence to 15,000 km oil change intervals to prevent EGR and DPF clogging. PSA B71 2310 (5W-30) oil is essential due to its compatibility with the common-rail system and turbo lubrication. Extended idling and short trips increase soot loading, requiring periodic active DPF regeneration. High-pressure fuel pump failures are more likely when using non-EN 590 diesel; fuel quality should be verified. Post-2007 models feature revised HPFP calibration and improved filtration per PSA SIB 13-TD-016, reducing failure incidence. EGR valve cleaning should be performed every 80,000 km to maintain airflow and prevent limp mode.
Oil Specs: Requires PSA B71 2310 (5W-30) specification (PSA SIB 13-TD-016). Supersedes ACEA C3 and B5 standards.
Emissions: Euro 4 applies to all models; Euro 5 compliance for select 2008+ models confirmed via VCA Type Approval #VCA/EMS/6241.
Power Ratings: Measured under ECE R85 standards. Output consistent across fuel grades meeting EN 590 (PSA TIS Doc. B14810).
PSA Technical Information System (TIS): Docs B14810, B14901, B14840, SIB 13-TD-016
VCA Type Approval Database (VCA/EMS/6241)
ECE Regulation No. 85 (Engine Power Measurement)
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.
Locate the engine code stamped on the front lower engine block near the transmission bellhousing (PSA TIS B14810). The 8th VIN digit indicates engine type ('N' for DW12UTED variants). Pre-2007 models have a black plastic cam cover with 'HDi' badge; post-2007 units use a plain cover. Critical differentiation from DW12TED4: Original DW12UTED uses Bosch EDC17CP54 ECU with grey connector; DW12TED4 uses EDC17CP64 with black connector. Service parts require build date verification – high-pressure fuel pumps before 04/2007 are incompatible with later models due to revised calibration (PSA SIB 13-TD-016).
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.
Find answers to most commonly asked questions about CITROEN 4HY-DW12UTED.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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