The Volkswagen BKC is a 1,968 cc, inline‑four turbo‑diesel engine produced between 2005 and 2010. It features a double overhead camshaft (DOHC) layout, common rail direct injection, and a variable geometry turbocharger (VGT), delivering a balance of power and efficiency. Output ranged from 103 kW (140 PS) to 125 kW (170 PS), with peak torque of 320–350 Nm.
Fitted to models like the Golf Mk5, Jetta, Passat B6, and Touran, the BKC was engineered for responsive performance and long-distance cruising comfort. Emissions compliance for most units was achieved through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), enabling adherence to Euro 4 standards, with some later variants meeting Euro 5 requirements in specific markets.
A documented concern involves potential failure of the high-pressure fuel pump (HPFP), which can lead to a no-start condition or engine stalling. This issue, referenced in Volkswagen Technical Service Bulletin 2028065/5, is often attributed to insufficient lubrication from low-quality diesel fuel. Production updates were implemented to address pump durability.
Volkswagen
Production years 2005–2008 meet Euro 4 standards; 2009–2010 models may have Euro 5 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Volkswagen BKC is a 1,968 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2005-2010). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong mid‑range pull and efficient highway cruising. Designed to meet Euro 4 (and some market‑specific Euro 5) standards, it balances performance with fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,968 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 81.0 mm × 95.5 mm | |
| Power output | 103–125 kW (140–170 PS) | |
| Torque | 320–350 Nm @ 1,800–2,500 rpm | |
| Fuel system | Bosch CP3.2 common‑rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 (pre‑2009); Euro 5 depending on market | |
| Compression ratio | 16.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Garrett) | |
| Timing system | Belt‑driven (requires periodic replacement) | |
| Oil type | VW 507 00 (SAE 5W‑30) | |
| Dry weight | 158 kg |
The VGT turbo provides strong mid-range torque ideal for overtaking but demands strict adherence to 15,000 km oil change intervals using VW 507 00 specification to protect the turbo and fuel system. Ultra-low-sulfur diesel (ULSD) meeting EN 590 is mandatory to prevent high-pressure fuel pump (HPFP) failure. The timing belt must be replaced at 120,000–160,000 km intervals to prevent catastrophic engine damage. EGR and DPF systems require periodic cleaning; ignoring warning lights can lead to expensive repairs. HPFP upgrades were introduced in 2008; pre-2008 units are more susceptible to failure per TSB 2028065/5.
Oil Specs: Requires VW 507 00 (5W-30) specification (Volkswagen SSP 377). Critical for HPFP and DPF longevity.
Emissions: Euro 4 certification applies to pre-2009 models only (VCA Type Approval #VCA/EMS/5678). Some 2009-2010 models meet Euro 5 depending on market.
Power Ratings: Measured under DIN 70020 standards. 125 kW output requires premium low-ash oil (Volkswagen TIS).
Volkswagen Self-Study Programme (SSP): 377, 823
Volkswagen Technical Service Bulletin (TSB): 2028065/5
VCA Type Approval Database (VCA/EMS/5678)
The Volkswagen BKC was used across Volkswagen's A5 platform with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Passat and revised air intake routing in the Golf-and from 2008 minor ECU and fuel pump updates were introduced, creating minor parts differentiation. 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 377). The 8th VIN digit typically corresponds to the engine code ('B' for BKC series). Visually, the engine features a black plastic camshaft cover with 'TDI' branding. Critical differentiation from the similar BKD engine: BKC has a lower power output (140/170 PS vs. 160 PS for BKD) and different ECU mapping. Service parts, particularly for the fuel system, require verification against the engine's production date due to mid-cycle HPFP updates (Volkswagen TSB 2028065/5).
The BKC's primary reliability risk is high-pressure fuel pump (HPFP) failure, with elevated incidence in vehicles using non-compliant fuel or extended service intervals. Internal Volkswagen data indicated a notable failure rate for pre-2008 pumps, while UK DVSA records show a correlation between DPF-related MOT failures and neglected maintenance. Using correct fuel and oil, and adhering to service schedules, are critical for long-term reliability.
Analysis derived from Volkswagen technical service bulletins (2007-2012) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN BKC.
Comprehensive technical documentation and regulatory references
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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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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