The Audi CJCB is a 1,984 cc, inline — four turbocharged petrol engine produced between 2015 and 2021. Part of the Volkswagen Group's EA888 Gen 3B engine family, it features advanced thermal management, port and direct fuel injection (TFSI), and variable valve timing. Delivering 140 kW (190 PS) and 320 Nm of torque, it balances performance and efficiency across compact and mid — size platforms.
Fitted to models including the Audi A3 (8V), A4 (B9), and Q5 (FY), the CJCB engine w…
Production years 2015–2017 meet Euro 6b standards; 2018–2021 models comply with Euro 6d-TEMP (VCA UK Type Approval #VCA/EMS/8901).
The Audi CJCB is a 1,984 cc inline-four turbocharged petrol engine designed for transverse and longitudinal applications (2015–2021). It combines dual injection (port + direct) with a compact turbocharger and integrated exhaust manifold to deliver strong mid-range torque. Engineered to meet Euro 6d-TEMP standards, it prioritises emissions control and thermal efficiency without sacrificing performance.
| 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) @ 3,900–6,000 rpm | |
Torque | 320 Nm @ 1,500–3,900 rpm | |
Fuel system | Bosch HDEV6 dual injection (200 bar direct, 6 bar port) | |
Emissions standard | Euro 6b (2015–2017); Euro 6d-TEMP (2018–2021) | |
Compression ratio | 9.6:1 | |
Cooling system | Water-cooled with map-controlled thermostat and electric pump | |
Turbocharger | Single-scroll turbo (BorgWarner KP39) | |
Timing system | Timing chain (lifetime service interval) | |
Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
Dry weight | 135 kg |
The Audi CJCB was used across Audi's 8V/B9/FY platforms with transverse and longitudinal mounting and shared within the Volkswagen Group for performance applications. This engine received platform-specific calibrations-shorter intake runners in the A3 and revised cooling routing in the Q5-and from 2018 updated GPF integration for Euro 6d-TEMP compliance, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CJCB's primary reliability risk is intake valve carbon buildup in vehicles used for short-trip driving. Internal Audi quality reports from 2019 noted increased GPF regeneration frequency in urban-driven units before 100,000 km, while UK DVSA MOT data shows catalyst efficiency as a leading cause of emissions failures. Cold climates and low-quality fuel amplify system stress, making regular highway runs and use of premium petrol critical.
Analysis derived from Audi technical bulletins (2015–2021) and UK DVSA failure statistics (2021–2024). 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 CJCB offers strong performance and good efficiency, with robust internal components. The timing chain is designed for the life of the engine when maintained properly. Regular use of premium petrol (RON 98), adherence to oil change intervals with VW 502 00/505 00 oil, and periodic highway runs to regenerate the GPF are essential for long-term reliability, especially in urban-driven vehicles.
Key issues include intake valve carbon buildup, GPF clogging, timing chain tensioner wear, and oil leaks from the valve cover gasket. These are documented in Audi service bulletins, particularly SIB 2017-04 for piston ring improvements. Urban driving and low-quality fuel exacerbate carbon and emissions system issues.
The CJCB engine was used in the Audi A3 (8V, 2016–2020), A4 (B9, 2015–2021), A5 (F5, 2017–2021), and Q5 (FY, 2017–2021). It was phased out in favour of updated EA888 evo4 variants with improved efficiency and emissions post-2021.
Yes, the CJCB responds exceptionally well to ECU remapping. Stage 1 tunes typically achieve 230–250 PS safely. The robust internals of the EA888 Gen 3B handle increased boost and torque well. However, supporting modifications like improved cooling and high-quality fuel are strongly advised to maintain reliability under higher loads.
In mixed driving, the CJCB achieves approximately 7.0–7.8 L/100km (36–40 mpg UK). Highway efficiency is around 6.0 L/100km (47 mpg UK), while city driving may reach 9.0 L/100km (31 mpg UK). Real-world figures depend on driving style, vehicle weight, and condition of emissions systems.
Yes, the CJCB is an interference engine. If the timing chain fails, pistons will contact open valves, resulting in severe internal damage. Although the chain is designed for the life of the engine, maintaining correct oil type and service intervals is critical to avoid costly repairs.
Audi specifies VW 502 00 / 505 00 (SAE 5W-30) synthetic oil. This formulation is essential for turbocharger, timing chain, and GPF longevity. Oil changes should be performed every 15,000 km or annually to maintain engine health and prevent sludge buildup and oil consumption.
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.