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 .
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.
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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 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 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.
Aftermarket ECU tuning is common on the 4HR-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.
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
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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.
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