The Volkswagen AXU is a 1,390 cc, inline‑four petrol engine produced between 2006 and 2010. It features a dual overhead camshaft (DOHC) design with 16 valves and multi‑point fuel injection. This compact unit was engineered for efficiency in smaller platforms, delivering 55 kW (75 PS) and 126 Nm of torque, providing adequate performance for urban commuting.
Fitted primarily to the Polo (9N3) and Fox models, the AXU engine was designed for cost‑effective, reliable urban m…
Volkswagen
Production years 2006–2010 meet Euro 4 standards .
The Volkswagen AXU is a 1,390 cc inline‑four petrol engine engineered for compact hatchbacks (2006-2010). It combines multi‑point fuel injection with a DOHC valvetrain to deliver adequate low‑end torque and frugal fuel consumption. Designed to meet Euro 4 standards, it prioritises urban efficiency and reliability.
| 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) @ 5,400 rpm | |
Torque | 126 Nm @ 3,750 rpm | |
Fuel system | Multi‑point fuel injection (MPI) | |
Emissions standard | Euro 4 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt‑driven (requires periodic replacement) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | Not specified in primary sources |
The Volkswagen AXU was used across Volkswagen's Polo platform with transverse mounting. This engine received minor ECU mapping adaptations for different trim levels, but no major mechanical revisions occurred during its production run, ensuring broad parts compatibility. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
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 AXU engine is generally reliable if basic maintenance is followed. Its main weaknesses are the plastic coolant flange and the critical timing belt. Addressing the flange proactively and replacing the belt on schedule allows many AXU engines to exceed 200,000 km without major issues.
The most frequent issues are coolant leaks from the plastic flange, ignition coil failures causing misfires, and oil leaks from the valve cover gasket. The most severe risk is timing belt failure if not replaced at the 90,000 km/6-year interval.
The AXU 1.4-litre petrol engine was used in the Volkswagen Polo (9N3 generation, 2006–2009) and the Volkswagen Fox (2006–2010). It was typically badged as the '1.4' or '1.4 (75 PS)' in these models.
Significant power gains are difficult. The engine is naturally aspirated and tuned for economy. Basic modifications like a performance air filter or exhaust may yield minimal gains (2-5 PS). ECU remapping is generally not cost-effective for this engine.
Fuel economy is good for its era. Expect around 6.5–7.0 L/100km (40–43 mpg UK) in combined driving for a Polo 9N3. City driving may see 7.5–8.5 L/100km, while highway cruising can achieve 5.5–6.0 L/100km.
Yes. The AXU is an interference engine. If the timing belt breaks or jumps, the pistons will collide with the open valves, causing severe internal damage that requires a costly engine rebuild or replacement.
Volkswagen specifies oil meeting the VW 502 00 or 504 00 standard, typically a 5W-40 synthetic or semi-synthetic. Using the correct specification is vital for engine protection and longevity. Change intervals should not exceed 15,000 km or 1 year.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
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.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.