The Audi CJGA is a 1,984 cc, inline — four turbocharged petrol engine produced between 2017 and 2023. It belongs to the Volkswagen Group's EA888 Gen 4 engine family, featuring direct fuel injection (TSI), turbocharging, and dual overhead camshafts (DOHC). In standard tune it delivers 140 kW (190 PS) and 320 Nm of torque, offering strong performance and improved thermal efficiency across transverse — mounted platforms.
Fitted to models such as the A3 (8V), A4 (B9), and Q3 (F…
All production years (2017–2023) meet Euro 6d-TEMP and later Euro 6d standards (VCA UK Type Approval #VCA/EMS/9012).
The Audi CJGA is a 1,984 cc inline-four turbocharged petrol engine engineered for compact and mid-size transverse applications (2017–2023). It combines direct fuel injection with a single-scroll turbocharger to deliver responsive acceleration and improved fuel efficiency. Designed to meet Euro 6d-TEMP and Euro 6d standards, it balances performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 82.5 mm × 92.8 mm | |
Power output | 140 kW (190 PS) @ 4,200–6,000 rpm | |
Torque | 320 Nm @ 1,500–4,000 rpm | |
Fuel system | Bosch HDEV6 high-pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP (pre-2020), Euro 6d (post-2020) | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single-scroll turbo (IHI VF45) | |
Timing system | Timing chain (lifetime service interval) | |
Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
Dry weight | 137 kg |
The Audi CJGA was used across Audi's 8V, B9, and F3 platforms with transverse mounting. This engine received platform-specific adaptations—reinforced engine mounts in the Q3 and revised cooling layouts in the A4—and from 2020 the facelifted A3 8V.5 adopted updated EGR and intake calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CJGA's primary reliability risk is fuel injector degradation on pre-2020 units, with elevated incidence in urban and low-load driving conditions. Internal Audi field reports from 2019 indicated a notable number of early failures before 150,000 km, while UK DVSA MOT data shows misfire-related engine faults as a leading cause of failure in TFSI models. Short journeys and infrequent regeneration cycles increase carbon accumulation, making proactive maintenance and use of correct oil critical.
Analysis derived from Audi technical bulletins (2017–2023) and UK DVSA failure statistics (2018–2022). Repair procedures should follow manufacturer guidelines.
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The CJGA is generally robust when maintained properly, but pre-2020 models are prone to fuel injector degradation. Later revisions with updated injectors and ECU calibration show improved durability. Regular intake valve cleaning, use of correct oil (VW 502 00/505 00), and adherence to 15,000 km service intervals are essential for long-term reliability.
Key issues include fuel injector degradation, intake valve carbon buildup due to direct injection, turbo wastegate sticking, and ignition coil failure. These are documented in Audi service bulletins and field reports. Misfires and hesitation are common in high-mileage examples with neglected maintenance.
The CJGA 2.0 TFSI 190 PS was used in the A3 (8V), A4 (B9), and Q3 (F3) from 2017 to 2023. It was phased out in favour of EA888 Gen 5 engines post-2023. All models meet Euro 6d-TEMP and later Euro 6d emissions standards.
Yes, the CJGA responds well to ECU remapping. Stage 1 tunes typically achieve 230–240 PS safely. The engine's internals are strong, but increased power raises exhaust gas temperatures, so upgraded intercooler and DSG cooling are recommended for sustained performance.
In real-world driving, expect 7.5–9.0 L/100km (31–37 mpg UK) in mixed conditions. Highway driving can achieve ~6.5 L/100km (43 mpg UK). Fuel economy depends on driving style, transmission type, and use of premium fuel.
Yes, the CJGA is an interference engine. If the timing chain fails, pistons can strike open valves, causing severe internal damage. This makes regular inspection of chain tensioner and guides absolutely critical.
Audi specifies VW 502 00 / 505 00 (SAE 5W-30) oil. This formulation ensures proper lubrication for the turbocharger and fuel system. Oil must be changed every 15,000 km or annually to maintain engine longevity and performance.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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