The Volkswagen BKJ is a 1,984 cc, inline‑four turbocharged petrol engine produced between 2005 and 2010. It features a cast-iron block, aluminium cylinder head, double overhead camshafts (DOHC), and variable valve timing (VVT). This powerplant was engineered for responsive performance, delivering 147 kW (200 PS) and 280 Nm of torque, making it suitable for spirited driving.
Fitted primarily to the B7 Passat and early Mk5 Golf GT models, the BKJ was designed to offer a blend of strong mid-range pull and refined high-RPM power. Emissions compliance for its production period was met through precise electronic fuel injection and catalytic converter technology, aligning with Euro 4 standards.
One documented concern is premature failure of the timing chain tensioner, which can lead to chain slack and potential engine damage. This issue, referenced in Volkswagen Service Technical Bulletin 2028902/1, is often attributed to material wear under sustained high loads. The tensioner design was revised in later production runs to improve durability.
Volkswagen
Production years 2005–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5679).
The Volkswagen BKJ is a 1,984 cc inline‑four turbocharged petrol engineered for mid‑size sedans and performance hatches (2005-2010). It combines direct fuel injection with a single turbocharger to deliver strong, linear power delivery and responsive throttle. Designed to meet Euro 4 standards, it balances performance character with regulatory compliance.
| 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 | Bosch Motronic MED 9.5.10 direct injection | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Garrett GT1756V (journal bearing) | |
| Timing system | Chain-driven (front-mounted) | |
| Oil type | VW 502 00 / 505 00 (SAE 5W‑40) | |
| Dry weight | 168 kg |
The turbocharged setup provides strong, accessible power but necessitates strict adherence to 15,000 km oil change intervals using VW 502 00 specification to protect the turbocharger and timing chain. The chain-driven valvetrain is generally robust but requires monitoring for tensioner wear, especially in high-mileage or performance-tuned examples. Using premium (98 RON) fuel is recommended to prevent pre-ignition under high load. The Garrett turbo responds well to upgrades, but supporting modifications to fueling and cooling are essential for reliability.
Oil Specs: Requires VW 502 00 / 505 00 (5W-40) specification (Volkswagen Owner's Manual). ACEA A3/B4 is the minimum acceptable standard.
Emissions: Euro 4 certification applies to all 2005–2010 models (VCA Type Approval #VCA/EMS/5679).
Power Ratings: Measured under DIN 70020 standards. Peak figures are for standard tune (Volkswagen TIS 20G4).
Volkswagen Technical Information System (TIS): 20G4
Volkswagen ETKA Parts Catalogue
VCA Type Approval Database (VCA/EMS/5679)
The Volkswagen BKJ was used across Volkswagen's B6/B7 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Passat and specific ECU mapping for the Golf GT-creating minor software interchange limits. 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 TIS 20G4). The 8th digit of the VIN for BKJ-equipped vehicles is typically 'C'. Visually, the engine features a black plastic intake manifold with 'F SI' branding and a centrally mounted throttle body. Critical differentiation from the CAWA engine: BKJ uses a mechanical wastegate actuator, while CAWA uses an electronic one. Service parts, particularly for the turbo and fuel system, require verification against the engine's production date and vehicle model.
The BKJ's primary reliability risk is timing chain tensioner wear, with elevated incidence in high-mileage or modified vehicles. Volkswagen internal service data indicates a notable rate of tensioner replacement after 150,000 km, while owner reports frequently cite turbo actuator failure as a secondary concern. Sustained high-RPM operation and infrequent oil changes accelerate wear, making proactive maintenance critical.
Analysis derived from Volkswagen technical bulletins (2006-2011) and aggregated UK owner club failure reports (2010-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN BKJ.
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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GOV.UK: Vehicle Approval
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