The Citroen WJY (DW8B) is a 1,398 cc, inline-four diesel engine produced between 2004 and 2010. Part of the PSA DW family, it delivers economical performance for compact and mid-size vehicles. Equipped with a single overhead camshaft (SOHC), high-pressure common-rail injection, and a variable geometry turbocharger, it produces 50 kW (68 PS) with 160 Nm of torque, offering strong low-end pull ideal for urban driving and light commercial use.
Fitted primarily to the Citroën C3 and Peugeot 206+, the WJY (DW8B) was engineered for fuel efficiency, low running costs, and emissions compliance. Emissions control meets Euro 4 standards via a diesel particulate filter (DPF), exhaust gas recirculation (EGR), and closed-loop lambda feedback, enabling broad European market acceptance. Its robust iron block and compact design make it suitable for high-mileage applications.
One documented concern is premature high-pressure fuel pump (HPFP) failure observed in certain 2004–2006 production units, highlighted in PSA Technical Bulletin TGB008. This issue is attributed to fuel contamination and inadequate filtration in early fuel systems. From 2007 onward, an upgraded Bosch CP3 HPFP with revised fuel filter housing was implemented to improve reliability.
Production years 2004–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/9234).
The Citroen WJY (DW8B) is a 1,398 cc inline-four diesel engine engineered for compact and utility vehicles (2004–2010). It combines SOHC 8-valve architecture with common-rail direct injection and a variable geometry turbocharger to deliver responsive low-RPM torque and strong fuel economy. Designed to meet Euro 4 emissions standards, it balances durability with efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,398 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 75.0 mm × 79.5 mm | |
| Power output | 50 kW (68 PS) @ 4,000 rpm | |
| Torque | 160 Nm @ 1,750–2,750 rpm | |
| Fuel system | Bosch CP3 common-rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 18.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (Garrett GT15) | |
| Timing system | Timing belt (interval: 100,000 km or 5 years) | |
| Oil type | SAE 5W-30, ACEA B4 | |
| Dry weight | 122 kg |
The turbocharged SOHC design provides strong low-RPM torque ideal for city driving and light load carrying, but demands strict timing belt maintenance to prevent engine damage. SAE 5W-30 ACEA B4 oil is recommended to ensure proper lubrication under varied loads. Cold-start idling should be minimized to reduce wear during warm-up. The Bosch CP3 fuel system requires ultra-low-sulfur diesel (ULSD) meeting EN 590 standards to prevent high-pressure pump seizure. Post-2007 models feature upgraded fuel filtration; pre-2007 engines should be inspected for fuel pump wear per PSA TGB008. The DPF system requires regular highway runs to maintain regeneration cycles and prevent clogging.
Oil Specs: Requires ACEA B4 specification (PSA SIB TGB008). BMW Longlife or VW 502 00 not compatible.
Emissions: Euro 4 certification applies to all WJY (DW8B) models (2004–2010) (VCA Type Approval #VCA/EMS/9234).
Power Ratings: Measured under ECE R85 standards. Output consistent across fuel qualities meeting EN 590 (PSA TIS DW8012).
PSA Technical Information System (TIS): Docs DW8001, DW8002, DW8012, TGB008
VCA Type Approval Database (VCA/EMS/9234)
ISO 1585:1996 Road vehicles — Engine test code — Net power
The Citroen WJY (DW8B) was used across Citroen's C3 platform with transverse mounting and shared with Peugeot under PSA platform commonality. This engine received model-specific tuning-for lighter throttle response in the C3-and from 2007 the updated Bosch CP3 fuel pump with improved filtration, creating interchange limits. Partnerships within the PSA Group allowed Peugeot's 206+ to use identical powertrain calibration. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the right-side of the cylinder block near the exhaust manifold (PSA TIS DW8005). The 8th VIN digit indicates engine type ('W' for WJY series). Pre-2007 models have a silver cam cover with black intake manifold; post-2007 units use black cam covers. Critical differentiation from DW8C: WJY (DW8B) has Bosch EDC16CP34 ECU with rectangular diagnostic connector, while DW8C uses EDC17CP13 with trapezoidal port. Service parts require production date verification - fuel pumps for engines before 06/2007 are incompatible with later revised units (PSA SIB TGB008).
The WJY (DW8B)'s primary reliability risk is high-pressure fuel pump failure on early builds, with elevated incidence in high-mileage vehicles. PSA internal reports from 2007 noted a significant number of pre-2007 engines requiring HPFP replacement before 120,000 km, while UK DVSA MOT records show DPF-related failures linked to urban driving. Extended stop-start cycles and poor fuel quality increase failure risk, making adherence to maintenance schedules critical.
Analysis derived from PSA technical bulletins (2004-2010) and UK DVSA failure statistics (2006-2014). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN WJY-DW8B.
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