The Volkswagen BWK is a 1,984 cc, inline‑four turbocharged petrol engine produced between 2005 and 2010. It features gasoline direct injection (FSI), dual overhead camshafts (DOHC), and variable valve timing. This combination delivers strong, linear power delivery and enhanced fuel efficiency for its era, with peak outputs around 147 kW (200 PS).
Fitted primarily to the Mk5 and Mk6 Golf GTI (1K chassis), as well as the Jetta and Eos, the BWK was engineered for spirited, responsive performance. It targeted drivers seeking a blend of everyday usability and engaging dynamics. Emissions compliance was met through precise fuel metering and catalytic conversion, achieving Euro 4 standards.
One documented concern is carbon buildup on the intake valves, a known characteristic of early FSI engines without port injection. This issue, addressed in later TSI engines, is detailed in Volkswagen's internal service documentation. It can lead to rough idle or hesitation; periodic cleaning is the recommended service procedure.
Volkswagen
Production years 2005–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678).
The Volkswagen BWK is a 1,984 cc inline‑four turbocharged petrol engineered for hot hatch and compact performance models (2005-2010). It combines gasoline direct injection (FSI) with a single turbocharger to deliver responsive power and good mid-range torque. Designed to meet Euro 4 standards, it balances sporty performance with reasonable fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 82.5 mm × 92.8 mm | |
| Power output | 147 kW (200 PS) @ 5,100 rpm | |
| Torque | 280 Nm @ 1,800–5,000 rpm | |
| Fuel system | Gasoline Direct Injection (FSI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single turbo (Garrett or IHI) | |
| Timing system | Chain-driven | |
| Oil type | VW 502 00 / 504 00 (SAE 5W‑40) | |
| Dry weight | Approx. 150 kg |
The FSI system provides sharp throttle response and strong torque but requires periodic intake valve cleaning to prevent carbon buildup, which can cause misfires or rough running. Using the specified VW 502 00/504 00 oil is critical for turbo and chain longevity. The timing chain is generally robust but should be inspected if rattle is heard. High-quality 95 RON (or higher) fuel is recommended for optimal performance and to minimize carbon deposits. The turbocharger benefits from a brief cool-down period after hard driving.
Oil Specs: Requires VW 502 00 or 504 00 specification oil (Volkswagen Owner's Manual). LongLife 5W-40 is typical.
Emissions: Euro 4 certification applies to all 2005–2010 BWK engines (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under DIN 70020 standards. Peak output requires 95 RON fuel (Volkswagen SSP 324).
Volkswagen Service Training: SSP 324 '2.0l FSI Engine'
VCA Type Approval Database (VCA/EMS/5678)
Volkswagen Electronic Technical Catalog (ETKA)
The Volkswagen BWK was used across Volkswagen's Group A5 platforms with transverse mounting. This engine received platform-specific adaptations-reinforced mounts in the Eos and specific ECU mappings for the Jetta-with no major facelift revisions affecting core compatibility during its production run. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat surface of the cylinder block, near the #1 cylinder and below the fuel rail (Volkswagen SSP 324). The 8th VIN digit for Golf GTI models is typically 'K' for this engine variant. Visually, it features a black plastic intake manifold with 'FSI' branding and a centrally mounted throttle body. Critical differentiation from the later CCTA engine: BWK uses a cable-driven throttle body, while CCTA uses drive-by-wire. Service parts like the intake manifold and throttle body are specific to the BWK and not interchangeable with later TSI variants.
The BWK's primary reliability consideration is intake valve carbon buildup, a design characteristic of its FSI system. While not a mechanical failure, it is a common service item. UK DVSA data shows no systemic failure trends, but preventative maintenance is key. Using correct oil and fuel quality helps manage long-term reliability.
Analysis derived from Volkswagen technical bulletins (2005-2010) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN BWK.
Comprehensive technical documentation and regulatory references
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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
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VCA Certification Portal
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