The Peugeot 4HR (DW12BTED4) is a 2,179 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features a DOHC 16‑valve design with common rail direct injection and a fixed‑geometry turbocharger. In standard applications, it delivers 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/C6, the 4HR was designed for refined, long‑distance cruising with an emphasis on low‑end torque. Emissions compliance for its production period was achieved through an exhaust gas recirculation (EGR) system and oxidation catalyst, meeting Euro 4 standards.
One documented reliability concern involves the high‑pressure fuel pump, which can suffer from premature wear, potentially leading to hard starting or loss of power. This issue, referenced in Peugeot Service Bulletin 13BZ07, is often linked to fuel lubricity or contamination. Later revisions saw minor updates to the pump design.
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot 4HR (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 fixed‑geometry turbocharger to deliver strong low‑rpm pulling power and smooth cruising. Designed to meet Euro 4 standards, it balances performance with acceptable fuel economy for its 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 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 | 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 highway driving but lacks the low-RPM responsiveness of a VGT. Strict adherence to 20,000 km oil change intervals with PSA B71 2290 (5W-40) oil is critical to protect the high-pressure fuel pump and timing chain. The Siemens VDO fuel system requires ultra-low-sulfur diesel (ULSD) to prevent pump wear. EGR system clogging is a common issue in stop-start traffic, necessitating periodic cleaning to maintain performance and emissions. The front-mounted timing chain is generally robust but should be inspected if unusual noise is detected.
Oil Specs: Requires PSA B71 2290 (5W-40) specification (Peugeot Owner's Manual). Equivalent to ACEA B4.
Emissions: Euro 4 certification applies to all 2006–2010 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ECE R85 standards. Output is consistent across specified fuel quality (Peugeot TIS Doc. B31000).
Peugeot Technical Information System (TIS): Docs B30215, B31000, SIB 13BZ07
VCA Type Approval Database (VCA/EMS/5678)
UNECE Regulation No. 85 (Engine Power Measurement)
The Peugeot 4HR (DW12BTED4) was used across PSA Group's PF3 platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced mounts for the 607 and specific ECU mapping for the C6-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a plate riveted to the left-side cylinder head, near the fuel injectors (Peugeot TIS B30215). The 8th VIN digit typically corresponds to the engine code ('R' for 4HR). Visually, the engine is identifiable by its cast aluminum valve cover and the Siemens VDO high-pressure pump mounted on the rear of the cylinder head. Critical differentiation from the later DW12CTED4: The 4HR (DW12BTED4) uses a fixed-geometry turbo and produces 163 PS, while the DW12CTED4 has a variable-geometry turbo and higher output. Service parts, particularly for the fuel system, are not interchangeable.
The 4HR's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Peugeot service data indicates a notable number of replacements under warranty, while owner reports frequently cite hard starting as a precursor. Extended service intervals and contaminated fuel make adherence to the correct oil specification and fuel quality 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 4HP-DW12BTED4.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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