The Audi CAWB is a 1,968 cc, inline — four turbo — diesel engine produced between 2012 and 2018. It belongs to the Volkswagen Group's EA288 engine family, featuring an aluminium cylinder head, common — rail direct injection, and dual overhead camshafts. In standard tune it delivered 103 kW (140 PS) and 320 Nm of torque, with higher — output variants producing up to 130 kW (177 PS), offering strong low — end pull ideal for daily driving and motorway cruising.
Fitted to models such…
Production years 2012–2014 meet Euro 5 standards; 2015–2018 models comply with Euro 6b (VCA UK Type Approval #VCA/EMS/6790).
The Audi CAWB is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size models (2012–2018). It combines common-rail direct injection with two-stage turbocharging to deliver strong low-RPM torque and efficient cruising. Designed to meet Euro 5 and Euro 6b standards, it balances performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (two-stage) | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 103–130 kW (140–177 PS) @ 3,500–4,000 rpm | |
Torque | 320–400 Nm @ 1,750–2,750 rpm | |
Fuel system | Bosch CRS 2-20 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 5 (2012–2014), Euro 6b (2015–2018) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled with electric coolant pump | |
Turbocharger | Two-stage turbo system (low-pressure + high-pressure turbos; BorgWarner design) | |
Timing system | Chain-driven (rear-mounted; tensioner wear reported in early builds) | |
Oil type | Audi Longlife 04 (SAE 5W-30) | |
Dry weight | 158 kg |
The Audi CAWB was used across Audi's 8V/B8 platforms with transverse mounting and shared within the Volkswagen Group. This engine received platform-specific adaptations-shorter intake manifolds in the A3 and revised engine mounts in the A4-and from 2015 the facelifted A3 models adopted updated tensioner hardware, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CAWB's primary reliability risk is timing chain tensioner wear on early builds, with elevated incidence in urban stop-start use. Internal Audi quality reports from 2015 noted a significant number of pre-2015 engines requiring tensioner replacement before 90,000 km, while UK DVSA records link EGR/DPF clogging to emissions-related MOT failures in city-driven vehicles. Cold-start cycles and extended oil intervals increase chain and guide stress, making oil quality and adherence to service intervals critical.
Analysis derived from Audi technical bulletins (2012–2018) and UK DVSA failure statistics (2015–2023). 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 CAWB delivers efficient performance and strong torque, but early models (2012–2014) had reliability concerns, especially timing chain tensioner wear. Later revisions (post-2015) improved durability, so well-maintained examples can be quite robust. Regular servicing and using high-quality oil (5W-30 Audi Longlife 04) greatly aid longevity.
The biggest issues are timing chain tensioner wear (leading to rattle or breakage), turbo actuator sticking, and EGR/intake carbon buildup. Other complaints include oil leaks from the valve cover gasket and occasional DPF regeneration faults. These are well-documented in Audi service bulletins and technical reports.
This 2.0L TDI diesel engine was used in the Audi A3 (8V) and A4 (B8) between 2012 and 2018. It was also shared across the Volkswagen Group in the Volkswagen Passat B7 and Škoda Octavia Mk3. All applications meet Euro 5 or Euro 6b emissions standards.
Yes. The CAWB is moderately tunable. ECU remaps typically yield +30–50 kW safely on stage 1, as the stock internals handle moderate torque increases. Aftermarket upgrades (intercooler, exhaust) can support higher gains. Tuning should include monitoring of knock and boost to avoid over-stressing the engine.
Very efficient for its class. In an Audi A3 2.0 TDI (2015), typical consumption is ~5.8 L/100km (city) and ~4.1 L/100km (highway), or about 55 mpg UK combined. Real-world figures depend on driving style, but expect 50–58 mpg (UK) on mixed roads for a healthy CAWB engine.
Yes. The CAWB (like most modern Audis) is an interference engine. This means if the timing chain fails, pistons can strike open valves, causing severe internal damage. That's why chain maintenance is critical—any rattling at cold start should be investigated immediately.
Audi specifies a 5W-30 synthetic oil meeting Audi Longlife 04 (or newer) specification. Always use a quality oil designed for turbocharged diesel engines and change it every 15,000 km or annually to ensure proper chain lubrication and prevent carbon buildup.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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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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