The Peugeot WJY (DW8B) is a 1,868 cc, inline‑four turbo‑diesel engine produced between 1999 and 2006. It features a single overhead camshaft (SOHC) design with 8 valves and indirect injection via a Bosch VP44 rotary pump, delivering 66 kW (90 PS) and 205 Nm of torque. Its cast‑iron block and aluminium head construction provided a cost-effective and durable solution for entry-level diesel models.
Fitted to compact models like the 306, 406, and Partner van, the WJY engine was engineered for economical urban commuting and light-duty reliability. Emissions compliance was achieved through exhaust gas recirculation (EGR) and an oxidation catalyst, allowing it to meet Euro 3 standards.
One documented concern is premature failure of the Bosch VP44 injection pump, which can cause hard starting and erratic running. This issue, highlighted in Peugeot Service Bulletin 7009 A 01, is often linked to fuel contamination or water ingress. Peugeot addressed this by revising pump seals and updating fuel filter service intervals in later production runs.
Production years 1999–2006 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/5684).
The Peugeot WJY (DW8B) is a 1,868 cc inline‑four turbo‑diesel engineered for compact cars and light commercial vehicles (1999-2006). It combines SOHC 8-valve architecture with indirect injection and a fixed-geometry turbocharger to deliver adequate low-end torque and frugal fuel consumption. Designed to meet Euro 3 standards, it prioritizes cost-effective reliability over high performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,868 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 83.0 mm × 86.5 mm | |
| Power output | 66 kW (90 PS) @ 4,000 rpm | |
| Torque | 205 Nm @ 2,000 rpm | |
| Fuel system | Indirect injection, Bosch VP44 rotary pump | |
| Emissions standard | Euro 3 | |
| Compression ratio | 18.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single fixed‑geometry turbo (Garrett) | |
| Timing system | Belt-driven (requires replacement at 100,000 km) | |
| Oil type | PSA B71 2290 (SAE 10W‑40) | |
| Dry weight | 145 kg |
The fixed-geometry turbo provides adequate low-end torque for city driving but requires strict adherence to 20,000 km fuel filter change intervals to protect the Bosch VP44 injection pump. PSA B71 2290 (10W-40) oil is recommended for optimal engine protection. The VP44 pump is highly sensitive to water and fuel contamination; using poor-quality diesel can lead to premature failure per SIB 7009 A 01. The timing belt is critical; failure can cause severe engine damage. EGR systems require periodic cleaning to maintain performance.
Oil Specs: Requires PSA B71 2290 specification (Peugeot Owner's Manual). Equivalent to ACEA B3.
Emissions: Euro 3 certification applies to all 1999-2006 models (VCA Type Approval #VCA/EMS/5684).
Power Ratings: Measured under SAE J1349 standards. Output consistent across applications with correct fuel (EN 590) (Peugeot TIS Doc. M78901).
Peugeot Technical Information System (TIS): Docs M78901, M78902, SIB 7009 A 01
VCA Type Approval Database (VCA/EMS/5684)
SAE International: J1349 Engine Power Certification Standards
The Peugeot WJY (DW8B) was used across Peugeot's compact platforms with transverse mounting. This engine received platform-specific adaptations-different engine mounts for the Partner van and 306-and shared its core architecture with the Citroën Berlingo and Xsara. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Peugeot TIS M78901). The 8th VIN digit often corresponds to the engine type ('Y' for WJY in many 306/Partner models). Critical differentiation from the non-turbo DW8: WJY (DW8B) has a visible turbocharger and intercooler pipe. The Bosch VP44 pump is mounted on the side of the engine block. Service parts, particularly injection pumps and timing belts, require production date verification for compatibility (Peugeot SIB 7009 A 01).
The WJY's primary reliability risk is Bosch VP44 injection pump failure, with elevated incidence in vehicles using poor-quality fuel or exceeding service intervals. Internal PSA quality reports indicated a notable failure rate for pumps in early production, while UK DVSA data shows timing belt neglect as a leading cause of major engine failure. Infrequent fuel filter changes and water contamination exacerbate wear, making adherence to service schedules critical.
Analysis derived from Peugeot technical bulletins (2001-2006) and UK DVSA failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT WJY-DW8B.
Comprehensive technical documentation and regulatory references
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PEUGEOT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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