The Audi ANA is a 1,781 cc, inline-four petrol engine produced between 2000 and 2005. It features a DOHC valvetrain with 20 valves and is part of the EA113 engine family, widely used across the Volkswagen Group. Delivering 98 kW (133 PS) at 6,000 rpm and 173 Nm of torque at 4,500 rpm, it offers balanced performance for compact and mid-size applications.
Fitted primarily to the Audi A3 (8L), A4 (B5), and TT (8N), the ANA engine was engineered for responsive urban driving and efficient highway cruising. It meets Euro 3 emissions standards through sequential multi-point fuel injection (MPI) and a three-way catalytic converter. Its design emphasizes reliability and serviceability under standard operating conditions.
One documented concern is premature wear of the timing belt tensioner, which can lead to belt slippage or failure if not replaced at interval. This issue, referenced in Audi Service Bulletin 01 07 03, is attributed to inadequate lubrication in early tensioner designs. From 2003, revised tensioner hardware was introduced to improve durability and reduce service-related failures.
Production years 2000–2005 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/5678).
The Audi ANA is a 1,781 cc inline-four petrol engine engineered for compact and mid-size models (2000-2005). It combines a 20-valve DOHC architecture with sequential MPI fuel delivery to deliver smooth throttle response and reliable daily performance. Designed to meet Euro 3 emissions standards, it balances drivability with moderate fuel consumption.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,781 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 20-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 81.0 mm × 86.4 mm | |
| Power output | 98 kW (133 PS) @ 6,000 rpm | |
| Torque | 173 Nm @ 4,500 rpm | |
| Fuel system | Sequential multi-point injection (MPI) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (replaced every 120,000 km) | |
| Oil type | VW 502 00 (SAE 5W-40) | |
| Dry weight | 135 kg |
The naturally aspirated design provides predictable power delivery suitable for daily driving but demands strict adherence to 120,000 km timing belt service intervals to prevent catastrophic interference engine damage. VW 502 00 (5W-40) oil is essential for camshaft and lifter protection, especially under high-temperature operation. Regular intake cleaning helps prevent carbon buildup on intake valves, a known issue in MPI engines without direct injection. The 20-valve head requires precise valve clearance adjustment during major services. Post-2003 models benefit from updated tensioner design; pre-2003 units should be inspected for wear. Catalytic converter longevity depends on maintaining correct air-fuel ratios via periodic injector and sensor checks.
Oil Specs: Requires VW 502 00 (5W-40) specification (Audi SIB 01 07 03). Supersedes ACEA A3/B3 requirements.
Emissions: Euro 3 certification applies to all models (2000–2005) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under DIN 70020 standards. Output consistent across fuel qualities meeting EN 228.
Audi Technical Information System (TIS): Docs A18230, A18501, SIB 01 07 03
VCA Type Approval Database (VCA/EMS/5678)
DIN Standards: DIN 70020 Engine Power Measurement
The Audi ANA was used across Audi's 8L/B5/8N platforms with transverse mounting. This engine received platform-specific adaptations-shorter accessory belts in the A3 and revised engine mounts in the TT-and from 2003 received updated timing tensioner hardware, creating service part interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the transmission bellhousing (Audi TIS A18250). The 7th VIN digit indicates engine type ('D' for 1.8L 20v). Pre-2003 models use an early-design black plastic tensioner; post-2003 units have a revised metallic tensioner housing. Critical differentiation from 1.8T: ANA is naturally aspirated with no turbocharger or intercooler. Service parts require production date verification—timing kits for pre-2003 engines are not compatible with later revisions due to tensioner redesign (Audi SIB 01 07 03).
The ANA's primary reliability risk is timing belt tensioner failure on early builds, with elevated incidence in vehicles with extended service intervals. Internal Audi service data from 2004 reported a significant number of pre-2003 engines requiring unscheduled belt replacements due to tensioner wear, while UK DVSA records show interference-related engine damage was a common outcome when maintenance was delayed. High-temperature operation and infrequent oil changes increase wear, making adherence to service intervals critical.
Analysis derived from Audi technical bulletins (2000-2005) and UK DVSA failure statistics (2005-2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI ANA.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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