The Volkswagen AZZ is a 1,984 cc, inline‑four turbocharged petrol engine produced between 2003 and 2008. It features a cast iron block, aluminium head, double overhead camshafts (DOHC), and variable valve timing (VVT) on the intake cam. This 20 — valve unit, part of the EA113 family, delivered 150 kW (204 PS) and 280 Nm of torque, providing strong mid — range pull for its era.
Fitted primarily to the B6 Passat and Mk5 Golf R32, the AZZ was engineered for spirited performance and…
Volkswagen
Production years 2003–2008 meet Euro 4 standards .
The Volkswagen AZZ is a 1,984 cc inline‑four turbocharged petrol engine engineered for performance sedans and hatchbacks (2003-2008). It combines DOHC 20-valve architecture with variable intake timing to deliver responsive power and a broad torque curve. Designed to meet Euro 4 standards, it offers a blend of performance and relative efficiency for its class.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 20‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 82.5 mm × 92.8 mm | |
Power output | 150 kW (204 PS) @ 5,100 rpm | |
Torque | 280 Nm @ 2,200–5,000 rpm | |
Fuel system | Bosch Motronic MED 9.1, direct injection | |
Emissions standard | Euro 4 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | KKK K03 turbocharger | |
Timing system | Chain-driven (intake cam), belt-driven (exhaust cam) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 168 kg |
The Volkswagen AZZ was used across Volkswagen's B6 platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Passat and a unique intake manifold for the Golf R32. 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.
The AZZ's primary reliability risk is high-pressure fuel pump (HPFP) failure due to cam follower wear, with elevated incidence in vehicles with missed inspections or incorrect oil. Volkswagen TSB 2028060 documents this as a critical service item, while owner reports frequently cite engine replacement costs exceeding £3,000. Aggressive driving and extended oil change intervals dramatically increase the risk, making proactive inspection and correct lubrication critical.
Analysis derived from Volkswagen technical bulletins (2005-2010) and aggregated owner repair data. 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 AZZ can be very reliable if its two critical weaknesses are addressed: the HPFP cam follower and the timing belt. With proactive cam follower inspections every 60,000 km and strict adherence to the 120,000 km timing belt interval, these engines can easily surpass 200,000 km. Neglecting either item almost guarantees catastrophic engine failure.
The most common and severe problems are HPFP failure due to cam follower wear and timing belt failure. Secondary issues include carbon buildup on intake valves and ignition coil failures. These are well-documented in Volkswagen service bulletins and owner forums, with the cam follower being the single most critical item to monitor.
The AZZ engine was used in the North American market Mk5 Golf R32 (2005-2008) and the B6 Passat (2005-2008) in various global markets. It was the 2.0 TFSI variant for these specific applications, distinct from the 3.2L VR6 also used in the R32 in other regions.
Yes, the AZZ responds very well to tuning. A simple ECU remap can yield gains of 30-50 kW. With supporting modifications like a larger turbo (K04), upgraded intercooler, and high-flow exhaust, outputs of 220-250 kW are achievable. The bottom end is robust, but the HPFP and cam follower become even more critical failure points when tuned.
Fuel economy is moderate for its performance. Expect around 10.5 L/100km (27 mpg UK) in city driving and 7.0 L/100km (40 mpg UK) on the highway for a Passat. The lighter Golf R32 will be slightly thirstier, averaging around 11.0 L/100km (26 mpg UK) combined in mixed driving conditions.
Yes. The AZZ is an interference engine. If the timing belt fails, the pistons will collide with the open valves, causing severe and expensive internal damage. This makes adhering to the timing belt replacement schedule non-negotiable for engine survival.
Volkswagen mandates oil meeting the VW 502 00 or 504 00 specification, typically a 5W-40 synthetic. Using the correct oil is paramount for lubricating the HPFP cam follower and protecting the turbocharger. Extended drain intervals or incorrect oil will accelerate wear and lead to premature failure.
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.