The Volkswagen BSW is a 1,984 cc, inline‑four turbocharged petrol engine produced between 2005 and 2008. It features gasoline direct injection (FSI), a single turbocharger, and dual overhead camshafts (DOHC). This engine was part of VW's effort to combine performance with efficiency, delivering strong mid-range power for responsive overtaking.
Fitted primarily to the Mk5 Golf GTI and Jetta GLI, the BSW was engineered for sporty, engaging driving dynamics. Emissions compliance for its production period was achieved through precise fuel metering and secondary air injection, meeting Euro 4 standards across its key markets.
One documented concern involves potential high-pressure fuel pump (HPFP) failure, which can lead to sudden loss of power or no-start conditions. This issue, referenced in Volkswagen's Technical Service Bulletin 2028062, is often attributed to premature camshaft lobe wear that drives the pump. Later FSI engines received revised pump and camshaft designs.
Volkswagen
Production years 2005–2008 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678).
The Volkswagen BSW is a 1,984 cc inline‑four turbocharged petrol engine engineered for performance hatchbacks and sedans (2005-2008). It combines gasoline direct injection (FSI) with a single turbocharger to deliver strong mid-range power and responsive acceleration. Designed to meet Euro 4 standards, it balances sporty performance with acceptable fuel economy for its era.
| 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) | |
| Torque | 280 Nm @ 1,800–5,000 rpm | |
| Fuel system | Bosch Motronic MED 9.5, direct injection (FSI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Garrett GT1756V (K03 derivative) | |
| Timing system | Chain-driven (front-mounted) | |
| Oil type | VW 502 00 / 504 00 (SAE 5W‑40) | |
| Dry weight | 155 kg |
The FSI system provides crisp throttle response but demands strict adherence to 10,000 km oil change intervals using VW 502 00/504 00 specification to prevent carbon buildup on intake valves and protect the high-pressure fuel pump. Premium unleaded fuel (RON 95 or higher) is required for optimal performance and to mitigate knocking. The timing chain is generally robust but requires periodic inspection of tensioner and guides. HPFP failure, linked to camshaft wear per TSB 2028062, is a critical failure point; early detection via fuel pressure diagnostics is advised.
Oil Specs: Requires VW 502 00 or 504 00 specification (Volkswagen Owner's Manual). ACEA A3/B4 is the minimum acceptable standard.
Emissions: Euro 4 certification applies to all 2005–2008 BSW engines (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under DIN 70020 standards. Peak output requires RON 95+ fuel (Volkswagen SSP 322).
Volkswagen Self-Study Programme (SSP): 322
VCA Type Approval Database (VCA/EMS/5678)
Volkswagen Technical Service Bulletin (TSB): 2028062
The Volkswagen BSW was used across Volkswagen's A5 platform with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Golf GTI and revised intake manifolds for the Jetta GLI. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat surface of the cylinder block, adjacent to the gearbox flange (Volkswagen SSP 322). The 8th VIN digit for BSW-equipped vehicles is typically '1'. Visually, the engine features a black plastic intake manifold with "FSI" branding and a Garrett turbocharger. Critical differentiation from the later CCTA engine: BSW uses a cable-operated throttle body and a different high-pressure fuel pump (Bosch 06A 127 025 AR vs. later 06H 127 025 N). Service parts, particularly for the fuel system, are not interchangeable with subsequent TFSI variants.
The BSW's primary reliability risk is high-pressure fuel pump (HPFP) failure, with elevated incidence in high-mileage or poorly maintained vehicles. Volkswagen TSB 2028062 documents this widespread issue, while owner reports frequently cite it as a major repair cost. Extended oil change intervals and use of incorrect oil specifications accelerate camshaft wear, making preventative maintenance critical.
Analysis derived from Volkswagen technical bulletins (2005-2008) and owner-reported failure data (2008-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN BSW.
Comprehensive technical documentation and regulatory references
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VOLKSWAGEN 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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