The Peugeot 4HP (DW12BTED4) is a 2,179 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features a high — pressure common — rail fuel system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard European specification, it produced 120 kW (163 PS) and 340 Nm of torque, engineered for strong pulling power in larger Peugeot and Citroën vehicles.
Fitted primarily to the Peugeot 407, 607, and Citroën C5 and C6 platforms…
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot 4HP (DW12BTED4) is a 2,179 cc inline‑four turbo‑diesel engineered for executive sedans and estates (2006-2010). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong, linear torque and smooth, quiet operation. Designed to meet Euro 4 standards, it prioritises refinement and long-distance capability.
| 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 | 120 kW (163 PS) | |
Torque | 340 Nm @ 2,000 rpm | |
Fuel system | Siemens VDO common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain-driven | |
Oil type | PSA B71 2290 (SAE 5W‑40) | |
Dry weight | 185 kg |
The Peugeot 4HP (DW12BTED4) was used across PSA Group's PF3 platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the 607 and specific ECU mapping for the C6-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
The DW12BTED4's primary reliability risk is high-pressure fuel pump drive failure, linked to camshaft lobe wear. PSA internal reports from 2009 indicated a significant number of failures before 150,000 km, particularly in vehicles with irregular servicing. Extended oil change intervals and use of incorrect oil specifications are key aggravating factors, making adherence to the maintenance schedule critical.
Analysis derived from PSA technical bulletins (2008-2011) and UK DVSA failure statistics (2015-2023). 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 a robust engine known for strong torque and refinement, but its long-term reliability hinges on addressing the known fuel pump drive issue. Vehicles that have had the camshaft and pump replaced per PSA bulletin 9117 B, and which receive strict, timely oil changes with the correct specification, can be very reliable beyond 200,000 km.
The most critical issue is high-pressure fuel pump failure due to camshaft lobe wear. Other common problems include EGR system clogging, turbocharger actuator faults, and injector seal leaks. These are well-documented in PSA service bulletins and owner reports.
This 2.2L HDi engine was primarily used in the Peugeot 407 and 607 sedans and estates from 2006 to 2010. It was also fitted to the equivalent Citroën C5 and flagship C6 models during the same period, always in the 163 PS variant.
Yes, the DW12BTED4 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 180-200 PS and torque to 400+ Nm, as the bottom end is strong. However, tuning increases stress on the turbo and fuel system, so ensuring those components are in perfect condition is crucial before proceeding.
Fuel economy is respectable for its size and power. In a Peugeot 407 saloon, expect around 8.5 L/100km (33 mpg UK) in combined driving. Highway cruising can yield figures closer to 6.5 L/100km (43 mpg UK). Real-world economy is heavily influenced by driving style and vehicle condition.
Yes. Like virtually all modern engines, the DW12BTED4 is an interference design. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal damage. Fortunately, the timing chain is very durable on this engine.
Peugeot mandates the use of oil meeting the PSA B71 2290 specification, typically a 5W-40 synthetic. Using the correct oil is not just about lubrication; it's critical for protecting the high-pressure fuel pump drive cam from premature wear. Change intervals should not exceed 20,000 km or 12 months.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with PEUGEOT or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
PEUGEOT 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
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
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.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialPEUGEOT documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.