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 .
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 | Refer to vehicle handbook / manufacturer specification | |
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.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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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.
Aftermarket ECU tuning is common on the CJCB platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
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
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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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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