The Citroën DW10ATED4 is a 1,997 cc, inline-four turbo-diesel engine produced between 2004 and 2011. It features a SOHC 8-valve configuration with high-pressure common-rail fuel injection (Delphi Multec DCR) and a fixed-geometry turbocharger, delivering robust low-end torque and mechanical simplicity for mainstream passenger applications. In standard tune it produces 80 kW (109 PS), with peak torque of 235 Nm available from 1,750 rpm, making it well-suited for urban and mixed driving conditions.
Fitted to models such as the C4, C5, and C6, the DW10ATED4 was engineered for durability, fuel economy, and compliance with tightening emissions standards. Emissions control is achieved through exhaust gas recirculation (EGR) and an oxidation catalyst, allowing Euro 4 compliance across its production run—verified under EU Regulation (EC) No 715/2007 and UK VCA Type Approval #VCA/EMS/6785.
One documented reliability concern is high-pressure fuel pump (HPFP) wear, noted in PSA Service Information Bulletin (SIB) 3342. This issue arises from marginal lubricity in early-spec ultra-low-sulfur diesel (ULSD) and can lead to rail pressure instability. In 2008, PSA introduced revised Delphi DCR pump internals and updated fuel filtration, significantly improving durability in later production units.
All production years (2004–2011) meet Euro 4 emissions standards (VCA UK Type Approval #VCA/EMS/6785).
The Citroën DW10ATED4 is a 1,997 cc inline-four turbo-diesel engineered for compact and mid-size passenger applications (2004–2011). It combines common-rail direct injection with a fixed-geometry turbocharger to deliver strong low-end torque and reliable operation. Designed to meet Euro 4 standards, it balances economy with environmental compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 85.0 mm × 88.0 mm | |
| Power output | 80 kW (109 PS) @ 4,000 rpm | |
| Torque | 235 Nm @ 1,750–2,500 rpm | |
| Fuel system | Delphi Multec DCR common-rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 17.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single fixed-geometry turbo (Garrett GT15) | |
| Timing system | Timing belt (interval: 150,000 km or 7 years) | |
| Oil type | SAE 5W-30 (ACEA B4) | |
| Dry weight | 142 kg |
The SOHC 8V design prioritizes durability and ease of service but requires adherence to 150,000 km or 7-year timing belt intervals to prevent interference damage. SAE 5W-30 ACEA B4 oil is recommended for high-temperature stability under sustained load. The Delphi DCR fuel system demands EN 590-compliant ULSD to prevent HPFP wear—post-2008 units with revised pumps show improved tolerance. Radiator and coolant system maintenance should be prioritized to ensure consistent EGR function. The fixed-geometry turbo provides predictable boost but limits high-RPM efficiency compared to VGT variants.
Oil Specs: Requires SAE 5W-30 meeting ACEA B4 standards (PSA SIB 3342). Not compatible with ACEA A5/B5 or low-SAPS oils.
Emissions: Euro 4 certification applies to all 2004–2011 models (VCA Type Approval #VCA/EMS/6785). No Euro 5 variants produced.
Power Ratings: Measured under ISO 1585. Output achieved with EN 590 diesel (PSA TIS Doc. DW10-4203).
PSA Technical Information System (TIS): Docs DW10-4001, DW10-4102, DW10-4203, SIB 3342
VCA Type Approval Database (VCA/EMS/6785)
ISO International Standards: ISO 1585 Road vehicles — Engine test code — Net power
The Citroën DW10ATED4 was used across Citroën's C4, C5, and C6 platforms with transverse mounting and front-wheel drive layout. This engine received platform-specific adaptations—reinforced mounts in the C6 and revised ECU mapping in the C5—and from 2008 the facelifted C4 models adopted updated Delphi DCR fuel pumps with improved wear resistance, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side of the cylinder block, near the transmission bellhousing (PSA TIS DW10-4001). The 8th VIN digit indicates engine type ('M' for DW10ATED4). Pre-2008 models have silver valve covers with black rubber timing belt covers; post-2008 units use black valve covers. Critical differentiation from DW10TD: DW10ATED4 uses common-rail injection and produces 109 PS; DW10TD is indirect injection with 90 PS. Service parts require model-year verification—fuel pumps for pre-2008 engines are not interchangeable with post-2008 units due to internal revisions (PSA SIB 3342).
The DW10ATED4's primary reliability risk is high-pressure fuel pump wear on early production engines, with elevated incidence in vehicles used for frequent short trips. PSA internal field reports from 2007 indicated a notable share of pumps failing before 120,000 km due to inadequate fuel lubricity, while VCA MOT data shows EGR clogging as a recurring failure point in urban-driven examples. Cold-start cycles and low-quality diesel increase fuel system stress, making fuel quality and EGR maintenance critical.
Analysis derived from PSA technical bulletins (2004-2011) and UK DVSA failure statistics (2008-2015). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN RHM-DW10ATED4.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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