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…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The AUW engine offers solid performance when properly maintained, but is prone to timing belt and ignition system wear. Later models (post-2003) show improved durability with updated tensioner design. Regular use of premium fuel, consistent oil changes with Audi Longlife 01 oil, and timely timing belt replacement significantly improve long-term reliability.
Primary issues include timing belt wear, intake carbon buildup, ignition coil pack failures, and valve cover oil leaks. These are documented in Audi service bulletins and are typical of 20v five-cylinder engines under mixed driving conditions. Preventative maintenance greatly reduces the risk of major repairs.
The AUW engine was used in the Audi A4 (8E), A6 (3B), and TT (8H) from 2001 to 2005. It typically powered 2.4 V6 variants in front-wheel-drive and Quattro configurations. It was also shared across Volkswagen Group models including the VW Passat B5 and early TT variants.
Yes, the AUW responds well to ECU remapping, with safe gains of +25-35 kW achievable on stock internals. However, due to its naturally aspirated design, significant power increases require forced induction upgrades. Tuning should include fuel system inspection and cooling upgrades to maintain reliability.
In combined driving, the AUW achieves approximately 9.5–11.0 L/100km (30–26 mpg UK). Highway efficiency is better at ~8.0 L/100km (~35 mpg UK), while city driving can exceed 12.0 L/100km (~24 mpg UK). Real-world consumption depends heavily on driving style and fuel quality.
Yes, the AUW is an interference engine. If the timing belt fails or skips, piston-to-valve contact will occur, resulting in severe internal damage. Strict adherence to the 90,000 km or 6-year replacement interval is essential to prevent catastrophic failure.
Audi specifies 5W-40 synthetic oil meeting Audi Longlife 01 specification. Oil changes should be performed every 15,000 km or annually to protect the valvetrain and prevent sludge formation. Using correct oil maintains optimal engine longevity and performance.
Comprehensive technical documentation and regulatory references
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AUDI Official Site
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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
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