The Audi CWUB is a 1,968 cc, inline — four turbo — diesel engine produced between 2013 and 2018. Part of the Volkswagen Group's EA288 engine family, it delivers 110 kW (150 PS) and 340 Nm of torque, emphasizing fuel efficiency, low emissions, and responsive performance. It features common rail direct injection, a variable geometry turbocharger (VGT), and a DOHC 16 — valve configuration for compact and mid — size applications.
Fitted to models such as the A3 (8V), A4 (B8/B9), a…
Production years 2013–2018 meet Euro 6 standards .
The Audi CWUB is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size platforms (2013–2018). It combines common-rail direct injection with a variable geometry turbocharger to deliver responsive low-end torque and efficient highway performance. Designed to meet Euro 6 standards, it balances real-world economy with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (VGT) | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 110 kW (150 PS) @ 3,500–4,000 rpm | |
Torque | 340 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CP4 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 6 | |
Compression ratio | 16.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
Timing system | Chain-driven (front-mounted, low wear risk) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 149 kg |
The Audi CWUB was used across Audi's 8V/B8/B9 platforms with transverse and longitudinal mounting. This engine received platform-specific adaptations-shorter intake manifolds in the A3 and revised cooling routing in the Q5-and from 2015 the facelifted A4 B9 adopted updated EGR calibration, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 CWUB is generally reliable when maintained with high-quality diesel and regular oil changes. Pre-2015 models had higher HPFP failure rates, but updated pumps improved longevity. Using EN 590 diesel and VW 507 00 oil every 15,000 km ensures optimal performance. Avoid short trips to prevent EGR and DPF clogging.
Key issues include high-pressure fuel pump wear, EGR valve clogging, turbo actuator sticking, and minor oil leaks. These are documented in Audi service bulletins. Fuel quality is critical—low-lubricity diesel accelerates pump wear. EGR and DPF systems require periodic cleaning to maintain efficiency.
The CWUB was used in the A3 (8V), A4 (B8/B9), and Q5 (8R) from 2013 to 2018. It powered the 2.0 TDI 150 PS variants. Some Volkswagen and Skoda models share the same EA288 engine family, but Audi-specific tuning and mounting differ slightly.
Aftermarket ECU tuning is common on the CWUB platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Excellent. In an A4 2.0 TDI (2014), combined consumption is ~4.7 L/100km (~60 mpg UK). Highway runs can achieve 4.1 L/100km (~69 mpg). Real-world figures range 45–60 mpg UK depending on driving style. DPF regeneration can temporarily increase consumption.
Yes. The CWUB is an interference engine. If the timing chain fails, pistons can contact valves, causing severe internal damage. However, the front-mounted chain is robust and typically lasts beyond 200,000 km with proper maintenance. No widespread chain failures have been reported.
Audi specifies VW 507 00 (5W-30) synthetic oil. This low-ash formulation protects the DPF and EGR systems. Change oil every 15,000 km or annually. Using incorrect oil can lead to sludge, injector issues, and premature HPFP wear. Always use OEM-approved brands.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
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