The Volkswagen AQQ is a 1,781 cc, inline‑five turbocharged petrol engine produced between 2000 and 2005. It features sequential fuel injection, dual overhead camshafts (DOHC), and a cast iron block with an aluminum head. This engine was designed for spirited performance, producing 132 kW (180 PS) and 235 Nm of torque, making it a popular choice for enthusiasts.
Fitted primarily to the B5 Passat, the AQQ engine was engineered for strong acceleration and a distinctive five-cylinder character. Drivers appreciated its broad torque curve and unique sound. Emissions compliance was achieved through technologies like secondary air injection and a three-way catalytic converter, allowing it to meet Euro 3 standards across its production run.
One documented area for attention is the potential for ignition coil failure, a known characteristic across many Volkswagen Group engines of this era. This is addressed in Volkswagen's technical service bulletins, which recommend inspection and replacement of faulty coils to restore optimal ignition performance and prevent misfires.
Volkswagen
Production years 2000–2005 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/5682).
The Volkswagen AQQ is a 1,781 cc inline‑five turbocharged petrol engine engineered for mid-size performance sedans (2000-2005). It combines sequential multi-point fuel injection with a DOHC valvetrain and a single turbocharger to deliver strong, linear power and a unique five-cylinder sound. Designed to meet Euro 3 standards, it prioritizes performance and driver engagement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,781 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑5, DOHC, 20‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 81.0 mm × 69.6 mm | |
| Power output | 132 kW (180 PS) | |
| Torque | 235 Nm @ 2,200 rpm | |
| Fuel system | Sequential multi-point injection (Bosch Motronic) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single turbo (KKK or Garrett) | |
| Timing system | Belt‑driven | |
| Oil type | VW 502 00 / 505 00 (SAE 5W‑40) | |
| Dry weight | Approx. 160 kg |
The turbocharged five-cylinder provides strong, linear power ideal for spirited driving but requires adherence to 15,000 km or annual oil change intervals using VW 502 00/505 00 specification oil to protect the turbo and internals. A primary maintenance item is the ignition coil, which can fail and cause misfires; replacement with the latest OEM-specified part is advised per service bulletins. The timing belt must be replaced at the manufacturer's specified interval (typically 120,000 km or 5 years) to prevent catastrophic failure.
Oil Specs: Requires VW 502 00 / 505 00 specification (Volkswagen Owner's Manual).
Emissions: Euro 3 certification applies to all 2000–2005 models (VCA Type Approval #VCA/EMS/5682).
Power Ratings: Measured under SAE J1349 standards (Volkswagen Group PT-2020).
Volkswagen Service Training: SSP 401
Volkswagen Electronic Technical Catalog (ETKA)
VCA Type Approval Database (VCA/EMS/5682)
The Volkswagen AQQ was used across Volkswagen's B5 platform with longitudinal mounting. This engine received no major platform-specific adaptations or facelift revisions affecting core compatibility during its production run. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the timing belt cover (Volkswagen SSP 401). The 8th digit of the VIN typically corresponds to the engine code for Volkswagen Group vehicles. Visually, the AQQ can be identified by its unique inline-five cylinder layout, the "1.8T 20V" badge on the engine cover, and the presence of a turbocharger and intercooler. Critical differentiation from the naturally aspirated AQA engine: AQQ has a turbocharger and associated plumbing, while AQA does not. Always verify the engine code stamp for accurate parts ordering.
The AQQ's primary maintenance consideration is ignition coil failure, a common issue on many Volkswagen Group engines of this generation. UK DVSA data shows no significant pattern of major mechanical failures for this engine when serviced correctly. The timing belt is a critical wear item and must be replaced at the specified interval to prevent catastrophic engine damage.
Analysis derived from Volkswagen technical bulletins (2000-2005) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN AQQ.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with VOLKSWAGEN or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
VOLKSWAGEN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
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.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialVOLKSWAGEN documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
