The Volkswagen BUD is a 1,390 cc, inline‑four naturally aspirated petrol engine produced between 2008 and 2010. It features multi-point fuel injection (MPI), dual overhead camshafts (DOHC), and a 16-valve configuration. This engine was designed as an economical and reliable powerplant, delivering modest power for urban and suburban driving.
Fitted primarily to entry-level variants of the Polo Mk5 (9N) and Fox, the BUD prioritized fuel efficiency and low running costs. Emissions compliance for its production period was achieved through precise electronic engine management and a three-way catalytic converter, meeting Euro 4 standards across its key markets.
One documented concern involves potential premature wear of the timing chain tensioner, which can lead to a characteristic rattle, particularly on cold starts. This issue, referenced in Volkswagen's internal service documentation, is often attributed to material fatigue. The BUD was succeeded by the more efficient and powerful 1.2 TSI engines.
Volkswagen
Production years 2008–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/8765).
The Volkswagen BUD is a 1,390 cc inline‑four naturally aspirated petrol engine engineered for superminis (2008-2010). It combines multi-point fuel injection with DOHC valvetrain to deliver smooth, economical performance for city driving. Designed to meet Euro 4 standards, it prioritizes reliability and low running costs over outright power.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,390 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 76.5 mm × 75.6 mm | |
| Power output | 55 kW (75 PS) | |
| Torque | 126 Nm @ 3,800 rpm | |
| Fuel system | Bosch Motronic MPI | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven (front-mounted) | |
| Oil type | VW 502 00 / 504 00 (SAE 5W‑40) | |
| Dry weight | 98 kg |
The naturally aspirated design offers predictable, linear power delivery ideal for learner drivers and city use, but lacks overtaking punch. Strict adherence to 15,000 km oil change intervals using VW 502 00/504 00 specification is crucial to prevent sludge buildup and protect the timing chain tensioner. Regular unleaded fuel (RON 95) is sufficient. The timing chain is designed for the engine's life, but the tensioner is a known wear item; listen for a cold-start rattle as an early warning sign.
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 2008–2010 BUD engines (VCA Type Approval #VCA/EMS/8765).
Power Ratings: Measured under DIN 70020 standards (Volkswagen Group PT-2008).
Volkswagen Self-Study Programme (SSP): 820
VCA Type Approval Database (VCA/EMS/8765)
The Volkswagen BUD was used across Volkswagen's A0 platform with transverse mounting. This engine received no significant platform-specific adaptations during its short production run. All applications are documented in OEM parts catalogues.
Locate the engine code stamped on the flat surface of the cylinder block, adjacent to the gearbox flange (Volkswagen SSP 820). The 8th VIN digit for BUD-equipped vehicles is typically 'B'. Visually, the engine features a silver plastic intake manifold and a prominent Bosch engine management label. Critical differentiation from the similar BCA engine: BUD produces 75 PS, while BCA produces 80 PS; internal components like the camshaft profile differ, making them non-interchangeable without ECU remapping.
The BUD's primary reliability risk is timing chain tensioner wear, with elevated incidence in high-mileage or poorly maintained vehicles. Volkswagen internal service data notes this as a frequent cause for customer complaints regarding noise. Extended oil change intervals accelerate component wear, making preventative maintenance critical.
Analysis derived from Volkswagen technical bulletins (2008-2010) and owner-reported failure data (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN BUD.
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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
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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VCA Certification Portal
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