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 (F3), the CJGA was engineered for responsive driving dynamics with enhanced fuel stratified injection and improved turbo response. Emissions compliance was achieved through variable valve timing (VVT), a regulated three-way catalytic converter, and cooled exhaust gas recirculation (EGR), meeting Euro 6d-TEMP and later Euro 6d standards throughout its production run.
One documented concern is high-pressure fuel injector degradation under low-load operation, highlighted in Audi Service Information Bulletin 2018-09-05 (Ref. 2018-09-05). This can lead to misfires and reduced combustion efficiency. From 2020, revised injector coatings and updated ECU mapping were implemented to improve deposit resistance and cold-start reliability.
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 turbocharged design provides strong mid-range torque ideal for spirited driving but requires adherence to 15,000 km service intervals to prevent intake carbon buildup and turbo degradation. VW 502 00/505 00 oil is essential for HPFP longevity due to its thermal stability. Extended idling and short trips accelerate oil contamination, increasing risk of injector coking. The Bosch HDEV6 fuel system demands premium unleaded (RON 98) for optimal performance; lower octane fuels may trigger knock control and power reduction. Injector degradation is documented under low-load conditions; replacement with updated unit per Audi SIB 2018-09-05 is recommended. Intake valve cleaning should be performed proactively to maintain airflow and prevent misfires.
Oil Specs: Requires VW 502 00 / 505 00 specification (Audi SIB 2018-09-05). Compatible with ACEA A1/B1.
Emissions: Euro 6d-TEMP certification applies to 2017–2019 models; Euro 6d compliance confirmed for 2020–2023 units (VCA Type Approval #VCA/EMS/9012).
Power Ratings: Measured under ECE R85 standards. Output consistent across EU markets with EN 228 fuel (Audi TIS Doc. A35222).
Audi Technical Information System (TIS): Docs A34822, A35222, SIB 2018-09-05
VCA Type Approval Database (VCA/EMS/9012)
European Commission Regulation (EC) No 715/2007
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.
Locate the engine code stamped on the front face of the cylinder block, near the timing chain cover (Audi TIS A34822). The 7th digit of the VIN indicates engine type ('C' for CJGA series). Pre-2020 models have a silver valve cover with a black intake manifold; post-2020 units feature revised injectors with updated ECU calibration. Critical differentiation from EA888 Gen 3B: CJGA uses Bosch HDEV6 injection with EDC17CP66 ECU, while earlier engines use EDC17CP56. Service parts require production date verification—injectors before 09/2020 are incompatible with updated designs per Audi SIB 2018-09-05.
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.
Find answers to most commonly asked questions about AUDI CJGA.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with AUDI or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialAUDI documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
