The Volkswagen BMA is a 1,390 cc, inline‑four turbocharged petrol engine produced between 2008 and 2015. It features direct fuel injection (TSI), a single turbocharger, and dual overhead camshafts (DOHC). In standard form, it delivered 90 kW (122 PS) and 200 Nm of torque, offering a balance of efficiency and accessible performance for compact vehicles.
Fitted primarily to the Polo Mk5 and Ibiza Mk4, the BMA was engineered for responsive urban driving and efficient highw…
Volkswagen
Production years 2008–2015 meet Euro 5 standards .
The Volkswagen BMA is a 1,390 cc inline‑four turbocharged petrol engine engineered for supermini applications (2008-2015). It combines gasoline direct injection (TSI) with a single turbocharger to deliver brisk low-end response and good fuel economy. Designed to meet Euro 5 standards, it provides a compelling blend of performance and efficiency for its vehicle class.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,390 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 76.5 mm × 75.6 mm | |
Power output | 90 kW (122 PS) @ 5,000 rpm | |
Torque | 200 Nm @ 1,500–3,500 rpm | |
Fuel system | Gasoline Direct Injection (TSI) | |
Emissions standard | Euro 5 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single turbo (IHI or Garrett) | |
Timing system | Chain-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | Approx. 110 kg |
The Volkswagen BMA was used across Volkswagen's A05 (PQ25) platform with transverse mounting. This engine received platform-specific ECU mapping for the Polo. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 BMA can be reliable with meticulous maintenance, particularly regarding oil changes. Its main weakness is the timing chain tensioner, which can fail if oil is not changed regularly. Addressing the tensioner at the first sign of rattle and using the correct oil can ensure the engine lasts well beyond 200,000 km.
The most frequent issues are timing chain tensioner failure (causing a cold-start rattle), ignition coil failures leading to misfires, turbocharger wastegate problems affecting boost, and coolant temperature sensor malfunctions. These are well-documented in Volkswagen service information.
The BMA engine was primarily used in the Volkswagen Polo Mk5 (2009-2014). It was also used in badge-engineered models from other VW Group brands, including the SEAT Ibiza Mk4 (2008-2015) and Škoda Fabia Mk2 (2010-2014), all in the 90kW (122 PS) 1.4 TSI variant.
Aftermarket ECU tuning is common on the BMA platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Fuel economy is very good for a turbocharged engine. Expect 6.0-7.5 L/100km (47-38 mpg UK) in mixed driving for a Polo. Careful highway driving can yield ~5.0 L/100km (56 mpg UK), while aggressive driving will push consumption above 9.0 L/100km (31 mpg UK).
Yes. The BMA, like virtually all modern DOHC engines, is an interference design. If the timing chain were to fail catastrophically, the pistons would collide with the valves, causing severe internal engine damage requiring a rebuild.
Volkswagen specifies oil meeting VW 502 00 or 504 00 standards, typically a 5W-40 full synthetic. Using the correct oil is crucial for protecting the turbocharger and timing chain. Change intervals should not exceed 15,000 km or 1 year, whichever comes first.
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
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.
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