The Volkswagen W petrol engine is a 4.0 L, W8 configuration engine produced between 1998 and 2005. It combined two narrow — angle VR4 banks on a common crankshaft with DOHC and 32 valves, delivering 202 kW (275 PS) and 370 Nm of torque. This complex architecture enabled high specific output while maintaining a compact footprint compared to a conventional V8.
Fitted exclusively to the B5.5 Passat W8 (3B platform), the W engine was engineered for refined, high — speed cruising w…
All production years (1998–2005) meet Euro 3 standards .
The Volkswagen W is a 3,999 cc W8 petrol engine engineered for executive sedans (1998–2005). It combines dual VR4 banks with DOHC and sequential port injection to deliver smooth high-rpm power and refined all-wheel-drive dynamics. Designed to meet Euro 3 emissions standards, it balances performance with drivetrain integration.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,999 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | W8, DOHC, 32‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 82.5 mm × 92.8 mm | |
Power output | 202 kW (275 PS) @ 6,000 rpm | |
Torque | 370 Nm @ 2,750 rpm | |
Fuel system | Sequential multi‑point injection (Bosch Motronic ME 7.1) | |
Emissions standard | Euro 3 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven DOHC with hydraulic VVT | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 248 kg |
The Volkswagen W was used across Volkswagen's B5.5 Passat platform with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced subframes and unique 4motion AWD calibration—and from 2003 the facelifted Passat W8 adopted updated VVT solenoids and ECU maps, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The W8 offers refined performance but demands meticulous maintenance. Early models (2001–2002) had VVT solenoid issues, improved in 2003+. With strict oil changes (VW 502 00, every 10,000 km) and premium fuel, it can exceed 200,000 km reliably. Neglect leads to sludge and solenoid failures.
Top issues are VVT solenoid failure, secondary air injection faults, CCV/oil separator leaks, and intake manifold runner control jams. All are documented in Volkswagen SIB 2013‑07 and related TIS updates. Carbon buildup is accelerated by short trips and poor oil quality.
Exclusively the B5.5 Passat W8 (2001–2005), sold as a limited-production flagship with 4motion AWD. No other VW, Audi, or Group models used this specific W8 configuration. It was never licensed to other manufacturers.
Aftermarket ECU tuning is common on the W platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Moderate for its output: ~12.5 L/100km (city), ~8.2 L/100km (highway), or ~23 mpg UK combined. Real-world mixed driving typically yields 20–25 mpg UK. Fuel consumption rises sharply with aggressive driving due to the engine’s 4.0 L displacement and AWD system.
Yes. The W8 is an interference engine. If the timing chains (one per bank) fail or jump, pistons will contact open valves, causing catastrophic damage. While chain failure is rare, VVT issues can mimic timing faults—prompt diagnosis is essential.
Volkswagen specifies 5W‑40 synthetic oil meeting VW 502 00 standard. Do not use Longlife or ACEA C3 oils. Change every 10,000 km or annually to prevent sludge that clogs VVT solenoids and CCV systems.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
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