The Citroën 4HP (DW12BTED4) is a 2,179 cc, inline-four turbo-diesel engine produced between 2004 and 2012. It formed part of the PSA DW12 family, co-developed with Ford, and was engineered for mid-size and large passenger vehicles. Featuring common rail direct injection, a variable geometry turbocharger (VGT), and DOHC valvetrain, it delivered 107 kW (145 PS) and 340 Nm of torque. This engine was designed for smooth, refined performance with strong low-end pull suitable for motorway cruising.
Fitted to models such as the C5, C6, and Xsara Picasso, the DW12BTED4 was engineered to balance refinement, fuel economy, and emissions compliance. It met Euro 4 standards through integrated exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), making it suitable for urban and long-distance driving. The engine's character emphasized quiet operation and linear power delivery, supporting Citroën’s focus on comfort-oriented dynamics in its executive and family vehicle segments.
One documented concern is premature high-pressure fuel pump (HPFP) wear, particularly in early production units. This issue, referenced in Citroën Technical Note TN.DW12.003, is linked to fuel quality sensitivity and inadequate lubrication under low-sulfur diesel conditions. From 2007, PSA introduced revised HPFP components and updated fuel system calibration to improve durability across the DW12 range.
Production years 2004–2008 meet Euro 4 standards; 2009–2012 models comply with Euro 5 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Citroën DW12BTED4 is a 2,179 cc inline-four turbo-diesel engineered for executive and large MPV applications (2004–2012). It combines common-rail direct injection with a single variable-geometry turbocharger to deliver responsive mid-range torque and quiet operation. Designed to meet Euro 4 and later Euro 5 standards, it balances comfort-oriented performance with regulated emissions compliance.
| 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 | 107 kW (145 PS) @ 3,600 rpm | |
| Torque | 340 Nm @ 2,000 rpm | |
| Fuel system | Bosch CRS 2.0 common-rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 (2004–2008); Euro 5 (2009–2012, market-dependent) | |
| Compression ratio | 17.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (IHI RHF4) | |
| Timing system | Timing belt (interval: 180,000 km or 10 years) | |
| Oil type | Total Quartz INEO ECS 5W-30 | |
| Dry weight | 185 kg |
The DW12BTED4 provides smooth, quiet power delivery ideal for grand touring but requires strict adherence to 180,000 km or 10-year timing belt replacement intervals to prevent catastrophic interference engine damage. Total Quartz INEO ECS 5W-30 oil is critical due to its low-SAPS formulation protecting the DPF and EGR systems. Fuel quality is paramount—ultra-low-sulfur diesel (EN 590) prevents high-pressure pump wear. The Bosch CRS 2.0 system is sensitive to contamination; pre-filter maintenance is advised. EGR and DPF systems require periodic regeneration and cleaning to maintain performance and avoid limp mode. Post-2007 models feature updated HPFP units; earlier engines should be inspected per Citroën TN.DW12.003.
Oil Specs: Requires Total Quartz INEO ECS 5W-30 specification (Citroën SIB 04 06 11). Meets ACEA C3 standards.
Emissions: Euro 4 applies to 2004–2008 models (VCA Type Approval #VCA/EMS/5678). Euro 5 compliance from 2009 varies by market.
Power Ratings: Measured under ECE R85. Output verified at the flywheel (PSA Group PT-2020).
Citroën Technical Information System (TIS): Docs D12-7045, SIB 04 06 11, TN.DW12.003
VCA Type Approval Database (VCA/EMS/5678)
PSA Group Engine Technical Specification DW12-TECH-001
Bosch Common Rail System CRS 2.0 Technical Bulletin
The Citroën 4HP (DW12BTED4) was used across Citroën's C5/C6/Xsara Picasso platforms with longitudinal mounting and shared with Peugeot and Ford under joint development agreements. This engine received platform-specific tuning—torque curve adjustments in the C6 and cooling enhancements in Xsara Picasso—and from 2009, Euro 5-compliant variants with revised EGR/DPF calibration were introduced, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the timing belt cover (Citroën TIS D12-7045). The 8th VIN digit identifies the engine ('L' for DW12 series). Pre-2007 units have a silver engine cover with black plastic timing cover; post-2007 models feature a black cover. Critical differentiation from DW12TED4: DW12BTED4 has Bosch CRS 2.0 fuel system and IHI turbo; DW12TED4 uses Delphi HPFP. Service parts require model-year verification—timing belts for pre-2007 engines are not compatible with Euro 5 variants due to tensioner redesign (Citroën SIB 04 06 11).
The DW12BTED4's primary reliability risk is high-pressure fuel pump wear in early builds, with elevated incidence in mixed urban/highway use. Internal PSA quality reports from 2006 noted increased HPFP failures in pre-2007 units, while UK DVSA MOT data links EGR/DPF clogging to stop-start driving in city-operated vehicles. Extended service intervals and low-quality diesel amplify pump and emissions system stress, making fuel quality and scheduled maintenance critical.
Analysis derived from Citroën technical bulletins (2004-2012) and UK DVSA failure statistics (2008-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 4HP-DW12BTED4.
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