The Citroen 4HW (DW12TED4) is a 2,179 cc, inline-four turbocharged diesel engine produced between 2011 and 2018 as part of PSA Peugeot Citroën's DW engine family. It features a dual overhead camshaft (DOHC), 16-valve configuration, and high-pressure common-rail direct injection, delivering 120 kW (163 PS) at 3,500 rpm with 340 Nm of torque available from 1,750 rpm. This engine combines strong pulling power with smooth operation for larger family and commercial vehicles.
Fitted to models such as the Citroen C5, Jumpy, and Peugeot 508, the DW12TED4 was engineered for confident motorway cruising and responsive mid-range performance. Emissions compliance was achieved through exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 5 compliance across its production run. The longitudinal mounting and front-wheel-drive layout made it ideal for PSA’s C-segment and light commercial platforms.
One documented concern is DPF regeneration failure due to incomplete active cycles, particularly in vehicles subjected to frequent urban driving or short trips. This issue, referenced in PSA Service Information Bulletin SIB-ENG-017-13, is linked to insufficient exhaust temperatures preventing soot burn-off. From 2014, revised ECU mapping and enhanced regeneration logic were introduced to improve DPF longevity and reduce fault frequency.
All production years 2011–2018 meet Euro 5 emissions standards with SCR/AdBlue system (VCA UK Type Approval #VCA/EMS/6792).
The Citroen 4HW (DW12TED4) is a 2,179 cc inline-four turbocharged diesel engine developed for larger sedans and light commercial vehicles (2011–2018). It uses common-rail injection and a DOHC 16-valve layout to deliver robust performance and efficiency. Engineered to meet Euro 5 standards with SCR technology, it balances refinement, economy, and emissions compliance in higher-load applications.
| 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) @ 3,500 rpm | |
| Torque | 340 Nm @ 1,750–2,500 rpm | |
| Fuel system | Common-rail direct injection (up to 1,800 bar) | |
| Emissions standard | Euro 5 with SCR/AdBlue | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Variable geometry turbo (VGT, Garrett GT1949V) | |
| Timing system | Timing belt (DOHC) | |
| Oil type | PSA B71 2310 (SAE 5W-30) | |
| Dry weight | 158 kg |
The VGT turbo provides strong low-RPM torque ideal for highway and load-carrying applications but requires strict adherence to 100,000 km or 5-year timing belt replacement intervals to prevent valve damage. PSA B71 2310 (5W-30) oil is critical for turbo and DPF system longevity. Regular highway runs (20+ minutes above 3,000 rpm) are essential to maintain DPF regeneration cycles and prevent EGR/SCR faults. The SCR system requires periodic AdBlue refills and must not be allowed to run dry to avoid limp mode. Post-2014 models benefit from improved ECU mapping and revised regeneration strategy, reducing DPF clogging risk.
Oil Specs: Requires PSA B71 2310 (5W-30) specification (PSA SIB-ENG-017-13). Supersedes ACEA C3.
Emissions: Euro 5 certification with SCR applies to all models (2011–2018) (VCA Type Approval #VCA/EMS/6792).
Power Ratings: Measured under ISO 1585 standards. Output assumes clean air filter, correct injection timing, and EN 590 diesel (PSA TIS Doc. B31640).
PSA Technical Information System (TIS): Docs B31040, B31290, B31441, SIB-ENG-017-13
VCA Type Approval Database (VCA/EMS/6792)
ISO 1585 Road vehicles — Test method for the measurement of fuel consumption
The Citroen 4HW (DW12TED4) was used across Citroen's C5/Jumpy platforms with longitudinal mounting and shared with Peugeot under PSA Group commonality agreements. This engine received platform-specific calibrations—slightly tuned throttle response in the C5 and revised torque delivery in the Jumpy—and from 2014 the updated C5 adopted a redesigned ECU map and updated DPF regeneration logic, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block near the oil filter housing (PSA TIS B31040). The 8th VIN digit indicates engine type ('M' for DW12 series). Pre-2014 models have a silver EGR valve housing with single coolant hose; post-2014 units feature a black housing with dual cooling lines. Critical differentiation from DW12ATED: DW12TED4 includes SCR/AdBlue system with dosing pump and NOx sensors. Service parts require model-year verification—DPF assemblies and EGR valves for pre-2014 models are not compatible with later revisions due to updated regeneration logic and sensor integration (PSA SIB-ENG-017-13).
The DW12TED4's primary reliability risk is DPF regeneration failure, with elevated incidence in vehicles subjected to frequent short trips. Internal PSA field reports from 2016 indicated a significant number of pre-2014 units required DPF cleaning or replacement before 100,000 km, while UK DVSA data links a portion of emissions-related failures to SCR system faults. Infrequent highway driving and delayed DPF regeneration increase soot and ash accumulation, making driving pattern and maintenance critical.
Analysis derived from PSA technical bulletins (2012–2018) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 4HW-DW12TED4.
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