The Peugeot 4HK (DW12ME5) is a 2,179 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features a robust cast-iron block, common rail direct injection, and a fixed-geometry turbocharger, delivering outputs between 120 kW (163 PS) and 130 kW (177 PS). Its high 16.6:1 compression ratio enables strong low-rpm torque for effortless towing and highway cruising.
Fitted primarily to the Peugeot 407 and 607 sedans, as well as the 807 MPV, the 4HK was engineered for refined, long-distance comfort and load-carrying capability. Emissions compliance for its production period was achieved through exhaust gas recirculation (EGR) and an oxidation catalyst, meeting Euro 4 standards.
One documented concern is premature failure of the high-pressure fuel pump drive shaft, potentially leading to complete pump seizure. This issue, referenced in Peugeot Service Bulletin 13BZ01A, is often linked to fuel lubricity and contamination. Later revisions incorporated a reinforced drive coupling.
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot 4HK (DW12ME5) is a 2,179 cc inline‑four turbo‑diesel engineered for executive sedans and large MPVs (2006-2010). It combines common‑rail direct injection with a fixed‑geometry turbocharger to deliver substantial low‑end pulling power and relaxed highway performance. Designed to meet Euro 4 standards, it prioritizes durability and torque for its vehicle class.
| 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 | 120–130 kW (163–177 PS) | |
| Torque | 370–400 Nm @ 1,500–2,000 rpm | |
| Fuel system | Siemens VDO common‑rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 16.6:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single fixed‑geometry turbo (Garrett) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | PSA B71 2290 (SAE 5W‑40) | |
| Dry weight | 185 kg |
The fixed-geometry turbo provides predictable, linear power delivery suited for heavy vehicles but requires high-quality, low-sulfur diesel to protect the Siemens VDO high-pressure fuel pump. PSA B71 2290 (5W-40) oil is mandatory to ensure proper lubrication of the timing chain and turbo bearings. The EGR system is prone to carbon buildup; periodic cleaning is recommended to maintain performance and prevent fault codes. Vehicles used for frequent short trips may experience accelerated EGR and intake manifold fouling. The high-pressure pump drive shaft, subject to bulletin 13BZ01A, should be inspected if fuel delivery issues arise.
Oil Specs: Requires PSA B71 2290 specification (Peugeot Owner's Manual). Equivalent to ACEA B4 standard.
Emissions: Euro 4 certification applies to all 2006-2010 production (VCA Type Approval #VCA/EMS/5678). No Euro 5 variants exist for this engine code.
Power Ratings: Measured under ECE R85 standards. Output is consistent across model range (Peugeot TIS Doc. B3300).
Peugeot Technical Information System (TIS): Docs B3210, B3255, B3300, SIB 13BZ01A
VCA Type Approval Database (VCA/EMS/5678)
UNECE Regulation No. 85 (Engine Power Measurement)
The Peugeot 4HK (DW12ME5) was used across Peugeot's PF3 platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the 807 and revised cooling ducting in the 607-with no significant facelift revisions during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat machined surface on the front of the cylinder block, near the gearbox bellhousing (Peugeot TIS B3205). The engine family is also indicated by the 8th digit of the VIN ('R' for DW12 engines). The 4HK (DW12ME5) can be visually identified by its black plastic rocker cover with "2.2 HDi" branding and the Siemens VDO common rail fuel system with a single, centrally mounted high-pressure pump. Critical differentiation from the earlier DW12TED4: The 4HK uses a different ECU (Bosch EDC16C34 vs. Siemens SID804) and has a revised turbocharger actuator. Service parts for the fuel system are specific to the ME5 variant and not interchangeable with earlier DW12 codes.
The 4HK (DW12ME5)'s primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Peugeot internal reports from 2011 noted a significant number of pump replacements under warranty for early-build engines, while UK DVSA data shows EGR-related faults as a common MOT advisory item. Extended idling and low-speed urban driving can accelerate carbon buildup, making fuel quality and periodic EGR cleaning critical.
Analysis derived from Peugeot technical bulletins (2008-2012) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT 4HK-DW12ME5.
Comprehensive technical documentation and regulatory references
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PEUGEOT Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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