The Audi BUY is a 1,395 cc, inline — four turbocharged petrol engine produced between 2010 and 2015. It forms part of the EA211 engine family, featuring aluminium construction, direct fuel injection (TSI), and a belt — driven valvetrain. Delivering 81 kW (110 PS) and 200 Nm of torque, it was engineered for compact vehicle applications with emphasis on weight reduction and thermal efficiency.
Fitted to models such as the Audi A1 1.4 TFSI and select SEAT and Škoda derivatives,…
Production years 2010–2015 meet Euro 5 standards .
The Audi BUY is a 1,395 cc inline-four turbocharged petrol engine engineered for compact models (2010–2015). It combines TSI direct injection with a belt-driven DOHC valvetrain to deliver responsive urban performance. Designed to meet Euro 5 emissions, it balances lightweight construction with fuel efficiency and drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,395 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.5 mm × 79.5 mm | |
Power output | 81 kW (110 PS) @ 5,000 rpm | |
Torque | 200 Nm @ 1,500–3,500 rpm | |
Fuel system | Bosch HDEV5 direct injection (up to 150 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | IHI IS12 turbocharger with electronic wastegate | |
Timing system | Toothed belt (interval: 120,000 km or 5 years) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 97 kg |
The Audi BUY was used across Audi's A1 platform with transverse mounting. This engine received platform-specific adaptations-shorter intake manifold and revised ECU mapping-and from 2013 the updated tensioner system per SIB 01 09 12, creating service part interchange limits. 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 Audi BUY offers good efficiency and performance, but pre-2013 models are prone to timing belt tensioner failure if service intervals are exceeded. Later revisions improved tensioner durability. When maintained properly—with timing belt changes every 5 years or 120,000 km and correct 5W-30 oil—it can be reliable. Neglecting the belt risks severe interference damage.
Key issues include timing belt tensioner wear leading to belt failure, turbo wastegate actuator sticking, intake valve carbon buildup, and high-pressure fuel pump failure. These are documented in Audi service bulletins. Regular maintenance and use of quality fuel and oil help mitigate most risks.
The BUY engine was used exclusively in the Audi A1 (8X) from 2010 to 2015, specifically in the 1.4 TFSI variant. It was also shared with SEAT Ibiza (6J) and Škoda Fabia (5J) models in the same period. All applications meet Euro 5 emissions standards.
Aftermarket ECU tuning is common on the BUY 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.
In the Audi A1 1.4 TFSI, combined fuel economy is approximately 5.2 L/100km (54 mpg UK). Real-world consumption ranges from 5.8 L/100km (49 mpg) in city driving to 4.6 L/100km (61 mpg) on highways. Driving style and transmission type significantly influence actual figures.
Yes, the BUY is an interference engine. If the timing belt fails, the pistons can collide with open valves, causing severe internal damage. Immediate attention to belt wear or noise is essential. Always replace the belt proactively per Audi's 5-year or 120,000 km interval.
The BUY requires VW 502 00 or 505 00 specification oil, typically SAE 5W-30. Use of correct oil ensures turbocharger, timing belt, and high-pressure fuel pump longevity. Change oil every 15,000 km or annually to maintain engine health and prevent sludge buildup.
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.