The Volkswagen BML is a 1,984 cc, inline‑four turbocharged petrol engine produced between 2005 and 2010. It features a double overhead camshaft (DOHC) design with 16 valves and direct fuel injection (FSI). Peak output is 147 kW (200 PS) with 280 Nm of torque, delivered via a single turbocharger for strong mid‑range response.
Fitted primarily to the Mk5 Golf GTI, Jetta GLI, and Eos, the BML was engineered for sporty performance and responsive driving dynamics. Emissions compliance for its production run was achieved through a three-way catalytic converter and secondary air injection, meeting Euro 4 standards.
A documented concern involves carbon buildup on the intake valves, a characteristic of early FSI direct injection systems lacking port wash. This issue, referenced in Volkswagen Group Service Technical Bulletin 2029876/1, can lead to rough idle and misfires. Later FSI and TSI engines incorporated revised injection strategies to mitigate this.
Volkswagen
Production years 2005–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5679).
The Volkswagen BML is a 1,984 cc inline‑four turbocharged petrol engineered for hot hatch and coupe models (2005-2010). It combines gasoline direct injection (FSI) with a single turbocharger to deliver strong mid-range torque and sporty performance. Designed to meet Euro 4 standards, it balances spirited driving with acceptable 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 rpm | |
| Fuel system | Bosch Motronic MPI/FSI (Direct Injection) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single turbo (KKK K03) | |
| Timing system | Timing chain (maintenance-free) | |
| Oil type | VW 502 00 / 504 00 (SAE 5W‑40) | |
| Dry weight | 143 kg |
The turbo provides strong mid-range pull ideal for overtaking but requires premium unleaded (RON 95/98) for optimal performance and knock prevention. The timing chain is designed as maintenance-free, though tensioner failure has been documented; listen for rattling on cold start. The FSI system's lack of fuel washing over intake valves necessitates periodic walnut-blasting cleaning to prevent carbon buildup and misfires per STB 2029876/1. High oil consumption can indicate worn piston rings or valve stem seals.
Oil Specs: Requires VW 502 00 or 504 00 (5W-40) specification (Volkswagen Owner's Manual). Critical for turbo and chain longevity.
Emissions: Euro 4 certification applies to all 2005-2010 BML models (VCA Type Approval #VCA/EMS/5679).
Power Ratings: Measured under DIN 70020 standards. Output requires RON 95 fuel minimum (Volkswagen SSP 324).
Volkswagen Self-Study Programme (SSP): 324
Volkswagen Electronic Technical Catalogue (ETKA)
VCA Type Approval Database (VCA/EMS/5679)
The Volkswagen BML was used across Volkswagen's A5 platform with transverse mounting. This engine received platform-specific adaptations-standardised ECU mapping for the Golf and Jetta, and revised engine mounts for the Eos-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, just below the injection pump (Volkswagen SSP 324). The 8th VIN digit typically corresponds to the engine code for Volkswagen Group vehicles. The BML is visually identified by its black plastic valve cover and the "FSI" badge on the intake manifold. Critical differentiation from the BWA engine: The BML uses a specific ECU map and has a different turbocharger; parts are not always interchangeable. Always verify the engine code before ordering parts.
The BML's primary reliability risk is carbon buildup on intake valves, inherent to its FSI design. Internal Volkswagen data indicated this as a frequent service item, while UK DVSA records show a correlation between misfire-related faults and high-mileage vehicles. The absence of port fuel injection makes proactive cleaning critical.
Analysis derived from Volkswagen technical bulletins (2006-2011) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN BML.
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Regulation (EC) No 715/2007
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