The Peugeot 4HL (DW12C) is a 2,179 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features a DOHC 16‑valve design with a variable geometry turbocharger (VGT) and high‑pressure common rail direct injection. Output ranges from 120 kW (163 PS) to 130 kW (177 PS), delivering peak torque of 370–400 Nm for strong low‑end pulling power ideal for larger vehicles.
Fitted primarily to the Peugeot 407 and 607 saloons, as well as the 807 MPV, the 4HL was engineered for refined, effortless cruising and towing capability. Emissions compliance for its production period was achieved through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), meeting Euro 4 standards.
One documented concern is premature failure of the high-pressure fuel pump, which can lead to sudden engine cut-outs. This issue, referenced in Peugeot Service Bulletin 13BZ01, is often attributed to fuel lubricity or contamination. Later revisions incorporated modified pump internals to improve durability.
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot 4HL (DW12C) is a 2,179 cc inline‑four turbo‑diesel engineered for executive saloons and MPVs (2006-2010). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong, linear torque and refined cruising. Designed to meet Euro 4 standards, it balances performance with acceptable emissions for its era.
| 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 @ 2,000 rpm | |
| Fuel system | Siemens VDO / Bosch 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 (front‑mounted) | |
| Oil type | PSA B71 2290 (SAE 5W‑30) | |
| Dry weight | 185 kg |
The VGT turbo provides smooth, lag-free power delivery suited to highway driving but demands strict adherence to 20,000 km oil change intervals using PSA B71 2290 specification to protect the turbo and fuel system. Ultra-low-sulfur diesel (EN 590) is mandatory to prevent high-pressure pump failure. The DPF system requires regular highway driving for passive regeneration; frequent short trips can lead to clogging and costly forced regenerations. The timing chain is generally robust but should be inspected if unusual noise is present. Fuel pump issues were prevalent in early builds; post-2008 units feature revised components per PSA SIB 13BZ01.
Oil Specs: Requires PSA B71 2290 (ACEA C3 equivalent) specification (PSA Owner's Manual).
Emissions: Euro 4 certification applies to all 2006-2010 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ECE R85 standards. Output varies by model application (PSA Group PT-2010).
PSA Technical Documentation: Repair Manual 4HL, SIB 13BZ01
VCA Type Approval Database (VCA/EMS/5678)
ACEA Oil Sequences: ACEA C3 Specification
The Peugeot 4HL (DW12C) was used across Peugeot's PF3 platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the 807 MPV for load-bearing-and no significant facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, near the gearbox bellhousing (PSA Repair Manual 4HL). The 8th digit of the VIN is 'R' for the 4HL engine. Visually, it features a black plastic rocker cover with "2.2 HDi" branding and a Garrett turbocharger on the exhaust manifold. Critical differentiation from the later 2.2 HDi 204 (DW12CTED4): The 4HL uses a Siemens VDO ECU with a specific connector, while the 204 PS variant uses a Bosch ECU. Fuel pump part numbers differ significantly; always verify against the engine's build date.
The 4HL (DW12C)'s primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. PSA internal reports indicated a notable failure rate before 150,000 km in early production batches, while owner feedback frequently cites sudden engine cut-outs. Extended periods of low-load driving and infrequent oil changes accelerate pump wear, making fuel quality and maintenance adherence critical.
Analysis derived from PSA technical bulletins (2007-2011) and owner-reported failure data (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT 4HL-DW12C.
Comprehensive technical documentation and regulatory references
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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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