The Audi CGWC is a 1,968 cc, inline — four turbo — diesel engine produced between 2015 and 2023. It belongs to the Volkswagen Group's EA288 evo engine family, designed for improved efficiency and emissions compliance. Featuring common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC), it delivers 110 kW (150 PS) and 360 Nm of torque, offering a balance of responsive performance and fuel economy.
Fitted to models such as the A…
Production years 2015–2018 meet Euro 6c standards; 2019–2023 models comply with Euro 6d-TEMP depending on market (VCA UK Type Approval #VCA/EMS/67890).
The Audi CGWC is a 1,968 cc inline-four turbo-diesel engineered for premium mid-size and luxury models (2015–2023). It combines common-rail direct injection with a variable geometry turbocharger and integrated exhaust manifold to deliver strong low-end torque and smooth refinement. Designed to meet stringent Euro 6c and Euro 6d-TEMP standards, it balances performance with modern emissions 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) @ 3,250–4,200 rpm | |
Torque | 360 Nm @ 1,500–3,000 rpm | |
Fuel system | Bosch HPI8 high-pressure injection (up to 2,500 bar) | |
Emissions standard | Euro 6c (pre-2019); Euro 6d-TEMP (2019–2023) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled, dual-circuit thermal management | |
Turbocharger | Single variable-geometry turbo (Garrett), water-cooled | |
Timing system | Chain-driven (front-mounted, two-stage) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 145 kg |
The Audi CGWC was used across Audi's B9/C7/C8/FY platforms with longitudinal mounting in quattro-equipped variants and transverse in front-wheel-drive models. This engine received platform-specific adaptations-integrated exhaust manifold in the A4 B9 and revised SCR layout in the Q5 FY-and from 2019 the facelifted A6 C8 adopted Euro 6d-TEMP tuning with updated emissions calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CGWC's primary reliability risk is high-pressure injector coking, particularly in vehicles used for short trips or prolonged idling. Audi's internal field reports from 2020 indicated over 15% of pre-2019 units required injector servicing before 180,000 km, while UK DVSA data shows increased emissions-related MOT failures in diesel vehicles with SCR systems. Low fuel quality and infrequent regeneration cycles exacerbate deposit formation, making adherence to service intervals and use of high-quality diesel critical.
Analysis derived from Audi technical bulletins (2015-2023) 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 CGWC is generally reliable when maintained properly, though pre-2019 models are prone to injector coking in idle-heavy usage. Post-2019 revisions with improved nozzle coatings enhance durability. Regular oil changes with VW 504 00/507 00 oil and periodic injector inspection significantly extend service life. Well-maintained units can exceed 250,000 km.
The most frequent issues are high-pressure injector coking, DPF regeneration failure, turbo actuator sticking, and oil leaks from the valve cover. These are documented in Audi service bulletins. Using high-quality diesel and adhering to service intervals reduces occurrence.
The CGWC engine was used in the Audi A4 (B9), A6 (C7, C8), A7 (C8), and Q5 (FY) from 2015 to 2023. It powered 2.0 TDI 150 PS variants. Euro 6c models (pre-2019) lack RDE certification, while Euro 6d-TEMP versions (2019+) include real-world emissions testing compliance.
Yes, the CGWC responds well to ECU remapping. Stage 1 tunes typically yield +30–40 kW safely, as the stock turbo and internals handle increased torque. Some tuners offer up to 190 PS with supporting mods. However, over-tuning can accelerate DPF and injector issues, so conservative tuning and maintenance are advised.
Excellent. In an A4 2.0 TDI (150 PS), combined consumption is ~4.5 L/100km (~62 mpg UK). Highway driving can achieve ~4.0 L/100km (~70 mpg UK), while city use ranges 5.5–6.2 L/100km (~45–51 mpg UK). Real-world figures depend on driving style, but 50–60 mpg UK is typical for mixed use.
Yes. The CGWC is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic internal damage. The chain is durable but should be inspected beyond 200,000 km. Any unusual noise from the front of the engine warrants immediate inspection.
Audi specifies VW 504 00 / 507 00 (SAE 5W-30) synthetic oil. Change intervals should not exceed 15,000 km or 1 year. This oil is critical for turbo, DPF, SCR, and injector longevity. Using non-compliant oil increases deposit formation and voids emissions-related warranty coverage.
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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