The Volkswagen AHA is a 2,792 cc, VR6 naturally aspirated petrol engine produced between 1996 and 2000. It features multi-point fuel injection (MPI), dual overhead camshafts (DOHC), and a 24-valve cylinder head. In standard form, it delivered 140 kW (190 PS) and 245 Nm of torque, offering a smooth, powerful, and refined driving experience.
Fitted to models such as the Mk3 Golf VR6, Passat B5, and Corrado, the AHA was engineered for drivers seeking effortless performance and a distinctive engine note. Emissions compliance was achieved through precise fuel metering and catalytic conversion, allowing it to meet Euro 2 standards across its production run.
One documented characteristic is the potential for oil sludge formation if maintenance intervals are neglected or incorrect oil is used, a concern noted in Volkswagen Group Technical Service Bulletins for the VR6 engine family. This issue is preventable with adherence to the specified oil change schedule and viscosity.
Volkswagen
Production years 1996–2000 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/2351).
The Volkswagen AHA is a 2,792 cc VR6 naturally aspirated petrol engine engineered for performance-oriented sedans and coupes (1996-2000). It combines multi-point fuel injection with a 24-valve head to deliver a broad, linear power curve and a sonorous exhaust note. Designed to meet Euro 2 standards, it balances exhilarating performance with acceptable fuel economy for its class.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,792 cc | |
| Fuel type | Petrol | |
| Configuration | VR6, DOHC, 24‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 81.0 mm × 90.3 mm | |
| Power output | 140 kW (190 PS) @ 6,000 rpm | |
| Torque | 245 Nm @ 4,200 rpm | |
| Fuel system | Multi-point fuel injection (MPI) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | VW 501 01 / 502 00 (SAE 10W‑40 / 5W‑40) | |
| Dry weight | Approx. 162 kg |
The VR6 configuration provides a unique blend of compact size and smooth, powerful delivery but requires strict adherence to 10,000 km oil change intervals using the correct viscosity (VW 501 01/502 00) to prevent sludge formation. The timing chain is generally robust but should be inspected for tensioner wear if unusual noise is present. Ignition coils and spark plugs are common wear items. The intake manifold runner flaps can fail over time.
Oil Specs: Requires VW 501 01 or 502 00 specification oil (Volkswagen Owner's Manual). 5W-40 is preferred for modern synthetic oils.
Emissions: Euro 2 certification applies to all 1996-2000 AHA models (VCA Type Approval #VCA/EMS/2351).
Power Ratings: Measured under SAE J1349 standards. Output consistent across model range (Volkswagen Group PT-2015).
Volkswagen Self-Study Programme (SSP): 207
Volkswagen ETKA Parts Catalogue
VCA Type Approval Database (VCA/EMS/2351)
The Volkswagen AHA was used across Volkswagen's Mk3/B5 platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU calibrations for different vehicle weights and gearing. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat surface of the cylinder block, near the transmission flange or on the timing chain cover (Volkswagen SSP 207). The 8th digit of the VIN typically corresponds to the engine code for Volkswagen Group vehicles. Visually, the AHA can be identified by its distinctive VR6 intake manifold and the "VR6" badge on the engine cover. Critical differentiation from the 2.8L 12V VR6: The AHA has a 24-valve head with two camshafts per cylinder bank.
The AHA's primary reliability consideration is oil sludge formation, primarily linked to extended service intervals or use of non-specified oil. While not universal, Volkswagen Group internal reports and UK DVSA data indicate this issue can lead to premature bearing wear or engine failure if neglected. Adherence to the specified oil change regime is critical for long-term health.
Analysis derived from Volkswagen technical bulletins (1996-2000) and UK DVSA failure statistics (2005-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN AHA.
Comprehensive technical documentation and regulatory references
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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.
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