The Citroën 4HP (DW12BTED4) is a 2,179 cc, inline — four turbo — diesel engine produced between 2004 and 2012. It formed part of the PSA DW12 family, co — developed with Ford, and was engineered for mid — size and large passenger vehicles. Featuring common rail direct injection, a variable geometry turbocharger (VGT), and DOHC valvetrain, it delivered 107 kW (145 PS) and 340 Nm of torque. This engine was designed for smooth, refined performance with strong low — end pull suitab…
Production years 2004–2008 meet Euro 4 standards; 2009–2012 models comply with Euro 5 depending on market .
The Citroën DW12BTED4 is a 2,179 cc inline-four turbo-diesel engineered for executive and large MPV applications (2004–2012). It combines common-rail direct injection with a single variable-geometry turbocharger to deliver responsive mid-range torque and quiet operation. Designed to meet Euro 4 and later Euro 5 standards, it balances comfort-oriented performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,179 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 85.0 mm × 96.0 mm | |
Power output | 107 kW (145 PS) @ 3,600 rpm | |
Torque | 340 Nm @ 2,000 rpm | |
Fuel system | Bosch CRS 2.0 common-rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (2004–2008); Euro 5 (2009–2012, market-dependent) | |
Compression ratio | 17.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (IHI RHF4) | |
Timing system | Timing belt (interval: 180,000 km or 10 years) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 185 kg |
The Citroën 4HP (DW12BTED4) was used across Citroën's C5/C6/Xsara Picasso platforms with longitudinal mounting and shared with Peugeot and Ford under joint development agreements. This engine received platform-specific tuning—torque curve adjustments in the C6 and cooling enhancements in Xsara Picasso—and from 2009, Euro 5-compliant variants with revised EGR/DPF calibration were introduced, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 DW12BTED4 is generally robust when maintained, but early models (2004–2006) had high-pressure fuel pump reliability issues. Later revisions (post-2007) improved pump durability. Regular DPF regeneration, EGR cleaning, and strict adherence to the 10-year/180,000 km timing belt interval are essential. Using high-quality diesel and correct oil (Total INEO 5W-30) supports long-term reliability.
The most documented issues are high-pressure fuel pump wear, EGR valve clogging, DPF regeneration failure, and timing belt degradation. These are covered in Citroën technical notes and service bulletins. Fuel quality, driving patterns, and maintenance intervals significantly influence the frequency and severity of these issues.
The DW12BTED4 was used in the Citroën C5 (2004–2012), C6 (2005–2012), and Xsara Picasso (2004–2008) as the 2.2 HDi 145. It was also shared with Peugeot (607) and Ford (Mondeo Mk4) under the PSA-Ford collaboration. Euro 5 variants from 2009 onward have updated emissions calibration.
Aftermarket ECU tuning is common on the 4HP-DW12BTED4 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In a C5 2.2 HDi, combined consumption is approximately 6.2 L/100km (~45.7 mpg UK). Highway driving can achieve ~5.5 L/100km (~51.4 mpg UK), while urban use may rise to 7.5 L/100km (~37.7 mpg UK). Real-world figures depend on load, driving style, and DPF regeneration frequency.
Yes. The DW12BTED4 is an interference engine. If the timing belt fails, the pistons will collide with open valves, causing severe internal damage. Adhering to the 180,000 km or 10-year replacement interval is critical. Any signs of belt wear or tensioner noise require immediate attention.
Citroën specifies Total Quartz INEO ECS 5W-30, a low-SAPS oil meeting ACEA C3 standards. This oil protects the DPF and EGR systems from ash buildup. Oil changes should be performed every 15,000–20,000 km or annually, whichever comes first, to maintain engine and emissions system health.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.