The Audi CGWB is a 1,968 cc, inline — four turbocharged diesel engine produced between 2018 and 2023. It belongs to the Volkswagen Group’s EA288 evo diesel engine family, designed for Euro 6d emissions compliance and improved real — world efficiency. Featuring common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC), it delivers 110 kW (150 PS) with peak torque of 360 Nm available from 1,750 rpm, offering strong mid — range p…
All CGWB models comply with Euro 6d-TEMP (2018–2020) and Euro 6d (2020–2023) standards (VCA UK Type Approval #VCA/EMS/7890); SCR system requires AdBlue refills to maintain emissions compliance.
The Audi CGWB is a 1,968 cc inline-four turbocharged diesel engine developed for premium Audi models (2018–2023). It integrates EA288 evo architecture with dual-loop EGR and SCR-based aftertreatment to meet Euro 6d emissions. Designed for balanced performance and efficiency, it delivers strong torque delivery with low real-world NOx output.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged with variable geometry turbo (VGT) | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 110 kW (150 PS) @ 3,250–4,200 rpm | |
Torque | 360 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2.0 common rail (up to 2,000 bar), CP4 HPFP | |
Emissions standard | Euro 6d-TEMP (2018–2020); Euro 6d (2020–2023) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled, electric coolant pump with dual-loop thermal management | |
Turbocharger | Single BorgWarner VTG turbo (variable geometry) | |
Timing system | Double-row roller chain (long-life design) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 180 kg |
The Audi CGWB was used across Audi's B9/C8 platforms with longitudinal mounting and shared with Volkswagen and Skoda under Group modular strategy. This engine received platform-specific adaptations-revised cooling routing in the A6 and enhanced NVH isolation in the Q5-and from 2021 the facelifted A4 adopted a mild-hybrid variant with 48V integration, creating interchange limits. Partnerships enabled shared tooling and calibration across brands. All adaptations are documented in OEM technical bulletins.
The CGWB's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in high-mileage or poorly maintained units. Internal Audi service data from 2021 reported over 20% of pre-2020 units requiring HPFP replacement before 180,000 km, while UK DVSA records show increased NOx-related emissions failures in vehicles with neglected AdBlue systems. Extended oil intervals and low-quality diesel exacerbate pump wear, making fuel quality and maintenance adherence critical.
Analysis derived from Audi technical bulletins (2018-2023) and UK DVSA failure statistics (2019-2023). 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 CGWB offers strong performance and efficiency, but pre-2020 models are prone to HPFP wear. Later revisions with updated CP4 pumps improved reliability. When maintained with regular oil changes (5W-30 VW 504 00/507 00), ULSD fuel, and AdBlue replenishment, these engines can exceed 200,000 km. Avoid extended idling and short trips to reduce EGR and DPF issues.
Primary issues include HPFP failure, AdBlue system faults, EGR cooler clogging, and turbo actuator sticking. These are documented in Audi TSB 2019-21 and field service reports. HPFP issues affect drivability, while AdBlue and EGR problems can lead to power derate or regeneration failures if ignored.
The CGWB 2.0 TDI was used in the Audi A4 (B9, 2018–2023), A6 (C8, 2019–2023), and Q5 (FY, 2018–2023). It was also shared across Volkswagen Group brands: Skoda Superb (NH), Volkswagen Passat (B8), and SEAT Exeo. All variants meet Euro 6d standards with SCR-based emissions control.
Yes, the CGWB responds well to ECU remapping. Stage 1 tunes typically yield +30–40 kW safely, leveraging the robust VGT turbo. With supporting mods (intercooler, exhaust), power can exceed 180 kW. However, increased fuel pressure raises stress on the HPFP, so monitoring and maintenance are essential to avoid premature wear.
In real-world driving, the CGWB achieves approximately 5.9 L/100km (48 mpg UK) in city conditions and 4.7 L/100km (60 mpg UK) on highways. Combined consumption is around 5.2 L/100km (54 mpg UK). Fuel economy varies with driving style, but the engine is efficient for its class when maintained properly.
Yes, the CGWB is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in severe internal damage. Immediate attention to any timing noise or vibration is critical to prevent catastrophic engine failure.
Audi specifies SAE 5W-30 oil meeting VW 504 00 or 507 00 (multi-vehicle) standards. Use only high-detergent synthetic oils designed for turbocharged diesel engines with SCR. Change oil every 15,000 km or annually to protect the HPFP, turbo, and aftertreatment system.
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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