The Audi CUVB is a 1,968 cc, inline — four turbo — diesel engine produced between 2015 and 2020. Part of the Volkswagen Group's EA288 evo engine family, it was designed for improved efficiency, lower emissions, and enhanced durability. Featuring common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC), it delivers 110 kW (150 PS) and 340 Nm of torque, meeting strict Euro 6 emissions standards with integrated SCR and AdBlue d…
All production years (2015–2020) meet Euro 6b standards (VCA UK Type Approval #VCA/EMS/5680).
The Audi CUVB is a 1,968 cc inline-four turbo-diesel engineered for mid-size and luxury models (2015–2020). It combines common-rail direct injection with a variable-geometry turbocharger and full SCR-based aftertreatment to deliver responsive torque and regulated emissions performance. Designed exclusively for Euro 6 compliance, it balances strong low-end pull with strict environmental requirements.
| 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 @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2-20 (up to 2,000 bar) | |
Emissions standard | Euro 6b | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Honeywell) | |
Timing system | Chain-driven (integrated in rear cover) | |
Oil type | VW 504 00 / 507 00 (5W-30) | |
Dry weight | 158 kg |
The Audi CUVB was used across Audi's B9/C7/FY platforms with longitudinal mounting and shared within the Volkswagen Group for premium applications. This engine received platform-specific adaptations-revised cooling layouts in the Q5 and enhanced NVH tuning in the A7-and from 2018 the facelifted A4 B9.5 adopted updated engine management calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CUVB's primary reliability risk is AdBlue dosing pump failure on pre-2018 units, with elevated incidence in mixed urban/highway driving. Audi internal quality reports from 2019 noted increased SCR-related fault codes in vehicles with infrequent long drives, while UK DVSA data links AdBlue system faults to over 22% of diesel-related MOT advisories. Crystallisation and electrical degradation amplify stress, making regular inspection and proper fluid use critical.
Analysis derived from Audi technical bulletins (2015-2020) 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 CUVB is generally robust when maintained properly, though pre-2018 models are prone to AdBlue dosing pump failures. Later variants show improved SCR system durability. Regular oil changes with VW 504 00/507 00 oil, coolant service, and use of quality diesel help prevent major issues. Well-maintained engines commonly exceed 250,000 km without major repairs.
Primary issues include AdBlue dosing pump failure (especially pre-2018), turbo actuator sticking, intake carbon buildup, and HPFP wear. These are documented in Audi SIB 2017-06-02 and TIS A41277. Oil dilution and injector wear are less common but possible with poor maintenance.
The CUVB was used in the A4 (B9, 2015–2020), A6 (C7, 2015–2018), A7 (C7, 2015–2018), and Q5 (FY, 2017–2020). It was also shared across Volkswagen Group brands, appearing in the VW Passat B8 and Skoda Superb III. All models are Euro 6b compliant with SCR and AdBlue systems.
Yes, the CUVB responds well to ECU remapping. Stage 1 tunes typically achieve 170–180 PS safely, leveraging the robust VGT and fuel system. Upgraded intercooler and exhaust support higher outputs. However, tuning increases thermal load on SCR and turbo systems, so monitoring temperatures and maintenance intervals is essential.
In combined driving, the CUVB achieves 4.4–5.0 L/100km (59–64 mpg UK). Highway efficiency is excellent at ~4.1 L/100km (70 mpg UK), while urban driving ranges from 5.2–6.0 L/100km (48–47 mpg UK). Real-world consumption depends on driving style, but 48–60 mpg UK is typical for mixed use.
Yes, the CUVB is an interference engine. If the timing chain fails or jumps, piston-to-valve contact is likely, resulting in severe internal damage. While the chain is designed for life, inspection is recommended beyond 200,000 km or if rattle is detected at cold start.
The CUVB requires VW 504 00 / 507 00 specification oil (typically 5W-30). This low-SAPS formulation protects the turbo, EGR, and DPF systems. Oil changes should occur every 15,000 km or annually to maintain engine longevity and prevent sludge or wear.
Comprehensive technical documentation and regulatory references
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AUDI Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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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