The Volkswagen BKG is a 1,595 cc, inline‑four naturally aspirated petrol engine produced between 2005 and 2008. It features a cast iron block, aluminium cylinder head, double overhead camshafts (DOHC), and two valves per cylinder. This engine, part of the EA111 family, was designed for dependable, economical performance in entry — level and compact models.
Fitted primarily to the Polo (9N3) and Fox, the BKG offered smooth, linear power delivery suited for urban commuti…
Volkswagen
Production years 2005–2008 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5679).
The Volkswagen BKG is a 1,595 cc inline‑four naturally aspirated petrol engineered for compact hatchbacks and city cars (2005-2008). It combines port fuel injection with a simple, robust valvetrain to deliver predictable, economical performance. Designed to meet Euro 4 standards, it prioritizes reliability and low running costs for high-mileage drivers.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,595 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 76.5 mm × 86.9 mm | |
Power output | 75 kW (102 PS) | |
Torque | 148 Nm @ 3,800 rpm | |
Fuel system | Siemens Simos 3.3 port fuel injection | |
Emissions standard | Euro 4 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain (front‑mounted; generally reliable) | |
Oil type | VW 502 00 (SAE 5W‑40) | |
Dry weight | 112 kg |
The Volkswagen BKG was used primarily in Volkswagen's 9N3 platform with transverse mounting. This engine received minor ECU and accessory adaptations across different model trims. All adaptations are documented in OEM technical bulletins.
The BKG's primary reliability risk is hydraulic lifter tick, with elevated incidence in high-mileage or poorly maintained examples. Volkswagen internal service data indicates a notable rate of lifter complaints before 120,000 km, while common owner reports highlight ignition coil failure as a frequent electrical issue. Extended oil change intervals and use of incorrect oil viscosity significantly accelerate lifter wear, making adherence to service schedules critical.
Analysis derived from Volkswagen technical bulletins (2005-2009) and aggregated UK MOT failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The BKG is generally a very reliable and robust engine with a simple design. Its long-term reliability is excellent provided that oil changes are performed regularly with the correct VW 502 00 specification oil to prevent lifter tick and sludge. With proper maintenance, a BKG engine can easily reach 250,000 km or more.
The most frequent issues are hydraulic lifter tick (caused by poor maintenance), ignition coil failure, and coolant temperature sensor failure. Oil sludge buildup is a serious but preventable problem linked to infrequent oil changes. These are well-documented in Volkswagen service bulletins and owner communities.
The BKG engine was used in the Volkswagen Polo Mk4 (9N3) (2005-2008) and the Volkswagen Fox (2005-2008). It was the 1.6-litre 8-valve petrol engine option for these models during that production period.
The BKG has limited tuning potential due to its naturally aspirated, 8-valve design. Simple modifications like a performance air filter or exhaust might yield minor gains of 5-10 PS. Significant power increases are not practical or cost-effective without forced induction, which is a major undertaking for this engine.
Fuel economy is very good for its era. Expect around 7.0-7.5 L/100km (40-38 mpg UK) in combined driving for a Polo. Highway cruising can return 5.5-6.0 L/100km (51-47 mpg UK). It is an economical choice for city and highway driving.
No. The BKG is a non-interference (free-wheeling) engine. If the timing chain were to fail, the pistons would not contact the valves, preventing catastrophic internal engine damage. This is a significant safety feature for long-term ownership.
Volkswagen mandates oil meeting the VW 502 00 specification, typically a 5W-40 synthetic. Using the correct oil is vital for preventing lifter noise and sludge buildup. Always adhere to the recommended 15,000 km service interval for oil changes.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with VOLKSWAGEN or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialVOLKSWAGEN documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.