The Audi ZG is a 2,498 cc, inline — five petrol engine produced between 2018 and 2024. It belongs to the Volkswagen Group’s EA888 Gen 4 family, featuring turbocharging, direct fuel injection (TSI), and variable valve timing with dual camshaft adjustment. In standard configuration, it produces 250 kW (340 PS) and 450 Nm of torque, delivering high — performance characteristics suitable for sport — oriented applications.
Fitted to models such as the Audi S4 (B9), S5 (F5), and…
Production years 2018–2020 meet Euro 6c standards; 2021–2024 models comply with Euro 6d-ISC-FCM .
The Audi ZG is a 2,498 cc inline-five turbocharged petrol engine from the EA888 Gen 4 series (2018–2024). It combines direct and port fuel injection with dual variable valve timing to deliver strong mid-to-high-range performance and improved emissions control. Designed to meet strict Euro 6 standards, it powers Audi's performance lineup with a focus on responsiveness and driving engagement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,498 cc | |
Fuel type | Petrol | |
Configuration | Inline-5, DOHC, 20-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 82.5 mm × 92.8 mm | |
Power output | 250 kW (340 PS) @ 5,800–6,500 rpm | |
Torque | 450 Nm @ 1,900–5,000 rpm | |
Fuel system | Dual injection (direct + port) with high-pressure fuel pump | |
Emissions standard | Euro 6c (pre-2021); Euro 6d-ISC-FCM (2021–2024) | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single turbo with variable turbine geometry (VTG) | |
Timing system | Chain (dual-row; serviceable but wear-prone under high load) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 168 kg |
The Audi ZG was used across Audi's B9/F5 platforms with longitudinal mounting and shared within the Volkswagen Group. This engine received platform-specific adaptations-reinforced mounts in the RS3 and revised ECU tuning in the S5-and from 2021 the facelifted S4 B9.5 adopted the ZG evolution with updated fuel pump and GPF, creating 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 ZG engine offers strong performance and refinement, but early models (2018–2020) had reliability concerns, particularly high-pressure fuel pump failures. Later revisions (post-2021) improved pump durability, so well-maintained examples can be robust. Regular servicing and using correct oil (5W-40 VW 502 00) significantly enhance longevity.
The primary issues are high-pressure fuel pump wear, ignition coil failures, and intake carbon buildup. Oil leaks from the valve cover gasket are also common on high-mileage units. These concerns are documented in Audi technical bulletins and supported by DVSA failure data. Preventative maintenance is key to long-term reliability.
The 2.5L ZG petrol engine was used in the Audi S4 (B9/B9.5, 2018–2024), S5 (F5, 2018–2024), and RS3 (8Y, 2019–2024) as the 2.5 TFSI (340–400 PS) variant. It was also shared with the Porsche 718 Cayman GTS (2020–2023). All models meet Euro 6c or Euro 6d-ISC-FCM emissions standards.
Aftermarket ECU tuning is common on the ZG 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 combined driving, the ZG achieves approximately 9.2 L/100km (30.7 mpg UK) in the S4 and 9.8 L/100km (28.8 mpg UK) in the RS3. Real-world consumption typically ranges between 25–32 mpg UK depending on driving style and conditions.
Yes. The ZG is an interference engine. If the timing chain fails or jumps, pistons may contact open valves, causing severe internal damage. Immediate attention to any timing rattle or DTCs is essential to prevent costly repairs.
Audi specifies 5W-40 oil meeting VW 502 00 (petrol) or 505 00 (multi-vehicle) standards. Use only high-quality synthetic oil and adhere to 15,000 km or annual service intervals to ensure proper turbo and chain lubrication and engine longevity.
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.