The Audi AWX is a 2,000 cc, inline — four turbo — diesel engine produced between 2008 and 2013. It features common rail direct injection, a variable geometry turbocharger (VGT), and double overhead camshafts (DOHC). In standard tune, it delivered 103 kW (140 PS) and 320 Nm of torque, serving as a core powerplant for Audi's C — segment and D — segment vehicles.
Fitted to models such as the A3 (8P), A4 (B7/B8), and A6 (C6/C7), the AWX engine was engineered for balanced performance,…
Production years 2008–2010 meet Euro 5 standards; 2011–2013 models include SCR-based aftertreatment for enhanced NOx control (VCA UK Type Approval #VCA/EMS/5678).
The Audi AWX is a 2,000 cc inline-four turbo-diesel engineered for compact and executive models (2008–2013). It combines common-rail direct injection with a single variable-geometry turbocharger to deliver responsive low-RPM torque and efficient highway cruising. Designed to meet Euro 5 emissions standards, it balances drivability with regulated environmental performance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,000 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 103 kW (140 PS) @ 4,000 rpm | |
Torque | 320 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CRS 2-20 common-rail (up to 1,600 bar) | |
Emissions standard | Euro 5 (SCR from 2011) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
Timing system | Chain-driven (double-row, front-mounted) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 168 kg |
The Audi AWX was used across Audi's 8P/B7/B8/C6/C7 platforms with longitudinal mounting and shared architecture with Volkswagen and Škoda for transverse applications. This engine received platform-specific adaptations-shorter intake tracts in the A3 and revised cooling routing in the A6-and from 2011 the facelifted A4 B8.5 adopted SCR-based aftertreatment, creating interchange limits. Partnerships enabled Volkswagen's 2.0 TDI and Škoda's 2.0 CR TDI to use identical core architecture. All adaptations are documented in OEM technical bulletins.
The AWX's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in vehicles using non-compliant diesel or extended oil intervals. Internal Audi quality reports from 2012 indicated a significant portion of pre-2011 units required HPFP replacement before 180,000 km, while UK DVSA MOT records show EGR/DPF faults as a leading cause of emissions failure in urban-driven examples. Extended idling and short-trip driving increase soot accumulation, making regular regeneration and quality fluid maintenance critical.
Analysis derived from Audi technical bulletins (2008–2013) and UK DVSA failure statistics (2014–2022). 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 AWX is generally robust when maintained properly, but pre-2011 models are prone to high-pressure fuel pump failures beyond 150,000 km. Later SCR-equipped variants show improved emissions system durability. Regular oil changes with VW 504 00/507 00 oil and use of quality diesel are essential for longevity.
Key issues include high-pressure fuel pump degradation, EGR and intake carbon buildup, turbo actuator sticking, and oil leaks from valve cover gaskets. These are documented in Audi service bulletins, particularly SIB 2011-03-01 for fuel system concerns.
The AWX was used in the A3 (8P), A4 (B7/B8), and A6 (C6/C7) from 2008 to 2013. It was also shared with Volkswagen Passat (B6/B7) and Škoda Superb (B6) in transverse applications. All variants produce 103 kW (140 PS) and 320 Nm.
Yes, the AWX responds well to ECU remapping. Stage 1 tunes typically achieve 120–130 kW (163–177 PS) safely. The Bosch HPFP and stock turbo can handle moderate increases, but supporting mods like upgraded intercooling are recommended for sustained performance.
In combined driving, the AWX achieves approximately 5.2–5.8 L/100 km (54–49 mpg UK). Highway efficiency can reach 4.5 L/100 km (63 mpg UK). Real-world consumption depends on driving style, but it remains competitive for its era.
Yes, the AWX is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can occur, resulting in severe internal damage. The chain is generally durable, but tensioner wear should be inspected during major services.
Audi specifies SAE 5W-30 oil meeting VW 504 00 / 507 00 standards. This low-ash formulation is critical for DPF and SCR system longevity. Oil changes should be performed every 15,000 km or annually to ensure optimal engine protection.
Comprehensive technical documentation and regulatory references
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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
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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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