The Audi AUW is a 2,393 cc, inline-five petrol engine produced between 2001 and 2005. It features a 20-valve configuration with double overhead camshafts (DOHC), delivering 140 kW (190 PS) at 6,000 rpm and 240 Nm of torque at 3,200 rpm. The five-cylinder layout provides a distinctive firing order and smooth power delivery, supporting refined performance in Audi’s mid-size lineup.
Fitted to models such as the 8E A4, 3B A6, and 8H TT, the AUW engine was engineered for balanced performance and everyday drivability in Audi’s executive and sport segments. It was designed for drivers seeking linear power delivery and responsive throttle characteristics. Emissions compliance was achieved through dual three-way catalytic converters and sequential fuel injection, meeting Euro 3 standards across its production run.
One documented concern is premature timing belt wear, particularly in vehicles with extended service intervals. This issue, referenced in Audi Technical Service Bulletin 02 06 02, arises from inadequate tensioner damping under thermal cycling. In 2003, Audi introduced revised tensioner design and updated belt material to improve durability and reduce risk of catastrophic failure.
Production years 2001–2005 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/3678).
The Audi AUW is a 2,393 cc inline-five petrol engine engineered for mid-size and sport models (2001-2005). It combines 20-valve architecture with DOHC valvetrain to deliver refined performance and high-RPM responsiveness. Designed to meet Euro 3 emissions standards, it balances power with drivability in naturally aspirated configuration.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,393 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-5, DOHC, 20-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.5 mm × 92.8 mm | |
| Power output | 140 kW (190 PS) @ 6,000 rpm | |
| Torque | 240 Nm @ 3,200 rpm | |
| Fuel system | Bosch Motronic ME7.1.1 with sequential injection | |
| Emissions standard | Euro 3 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (interference design) | |
| Oil type | Audi Longlife 01 (SAE 5W-40) | |
| Dry weight | 165 kg |
The inline-five configuration provides smooth high-RPM power ideal for highway cruising but requires strict adherence to 90,000 km or 6-year timing belt replacement intervals to prevent valve damage. Audi Longlife 01 (5W-40) oil is essential due to its thermal stability and protection against sludge formation in high-temperature combustion environments. Extended short-trip driving accelerates carbon buildup on intake valves, necessitating periodic cleaning. The timing belt system is interference-type; failure results in piston-to-valve contact. Engine longevity is highly dependent on consistent maintenance and use of premium unleaded fuel (RON 95) to prevent knock and injector coking.
Oil Specs: Requires Audi Longlife 01 (5W-40) specification (Audi SIB 02 06 02). Supersedes ACEA A3/B4 standards.
Emissions: Euro 3 certification applies to all 2001–2005 models (VCA Type Approval #VCA/EMS/3678).
Power Ratings: Measured under ECE R85 standards. Full output requires RON 95 fuel (Audi TIS Doc. A34789).
Audi Technical Information System (TIS): Docs A34100, A34567, SIB 02 06 02
VCA Type Approval Database (VCA/EMS/3678)
ISO 1585:1996 Road vehicles — Engine test code — Net power
The Audi AUW was used across Audi's 8E/3B platforms with longitudinal mounting and shared architecture with Volkswagen Group 20v five-cylinder units. This engine received platform-specific adaptations-shorter accessory drives in the 8E A4 and revised coolant routing in the 3B A6-and from 2003 the facelifted 8H TT adopted revised intake manifolds, creating interchange limits. Partnerships enabled shared service tooling across VW, Seat, and Skoda applications. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front timing cover near the alternator (Audi TIS A34100). The 7th VIN digit indicates engine family ('P' for 2.4 V6 series). Pre-2003 models have silver valve covers with black intake manifolds; post-2003 units use black valve covers. Critical differentiation from ARY: Original AUW uses Bosch Motronic ME7.1.1 ECU with trapezoidal diagnostic port, while ARY uses M5.2.1 with round port. Service parts require production date verification - intake manifolds for engines before 06/2003 are incompatible with later units due to revised runner design (Audi SIB 03 07 03).
The AUW's primary reliability risk is timing belt failure, with elevated incidence in high-mileage applications. Internal Audi service data from 2004 reported a significant share of pre-2003 engines requiring belt replacement before 100,000 km, while UK DVSA records link a notable portion of emissions-related MOT failures to misfires from fouled injectors in city-driven vehicles. Extended service intervals and low-load operation increase wear, making maintenance adherence critical.
Analysis derived from Audi technical bulletins (2001-2006) and UK DVSA failure statistics (2010-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI AUW.
Comprehensive technical documentation and regulatory references
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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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