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, the DW12BTED4 was designed for refined, long-distance cruising and effortless overtaking. Emissions compliance for its production period was achieved through an exhaust gas recirculation (EGR) system and a diesel particulate filter (DPF), meeting Euro 4 standards.
A documented service concern involves the high-pressure fuel pump drive camshaft lobe wear, which can lead to pump failure and subsequent engine immobilisation. This issue, referenced in PSA Group Service Bulletin 9117 B, is attributed to insufficient lubrication under specific operating conditions. Revised camshaft and pump components were introduced for later production.
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 engine provides strong, linear torque ideal for highway cruising but requires strict adherence to 20,000 km or 12-month oil change intervals to prevent camshaft lobe and turbo wear. PSA B71 2290 (5W-40) oil is critical for its specific additive package protecting the high-pressure fuel pump drive. Extended idling should be avoided to reduce DPF soot loading. The Siemens VDO fuel system demands ultra-low-sulfur diesel (EN 590) to prevent injector and pump failure. Vehicles experiencing fuel pump drive issues should have the camshaft and pump replaced per PSA SIB 9117 B. EGR systems require periodic cleaning to maintain performance.
Oil Specs: Requires PSA B71 2290 (5W-40) specification (PSA Owner's Manual 2007). 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 (PSA TIS Doc. DW12-PWR).
PSA Technical Information System (TIS): Docs DW12-A1, DW12-A2, SIB 9117 B
VCA Type Approval Database (VCA/EMS/5678)
UNECE Regulation No. 85 (Engine Power Measurement)
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.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox bellhousing (PSA TIS DW12-ID). The 8th VIN digit typically indicates engine displacement ('2' for 2.2L). The DW12BTED4 is visually identified by its black plastic rocker cover with "2.2 HDi" branding and the Siemens VDO fuel rail. Critical differentiation from the non-VGT DW12ATED: The BTED4 has a visible VGT actuator arm on the turbocharger. Service parts, particularly for the fuel system, are specific to the BTED4 variant and require verification against the engine's build date.
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.
Find answers to most commonly asked questions about PEUGEOT 4HR-DW12BTED4.
Comprehensive technical documentation and regulatory references
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