The Audi CLJA is a 1,984 cc, inline — four turbocharged petrol engine produced between 2021 and 2025. It belongs to the Volkswagen Group's EA888 Gen 4 engine family, featuring aluminium construction, direct fuel injection (TSI), and dual overhead camshafts. Delivering 169 kW (230 PS) and 370 Nm of torque, it integrates a 48V mild — hybrid system (MHEV) to enhance throttle response and reduce emissions.
Fitted to models such as the Audi A4 (B9), A5 (F5), and Q5 (FY), the CLJA en…
Production years 2021–2025 meet Euro 6d-TEMP standards .
The Audi CLJA is a 1,984 cc inline-four turbocharged petrol engine engineered for performance-oriented Audi models (2021–2025). It combines TSI direct injection with twin-scroll turbocharging, a 48V mild-hybrid system (MHEV), and a gasoline particulate filter (GPF) to deliver strong torque and emissions compliance. Designed for Euro 6d-TEMP, it supports both city and highway driving profiles.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (twin-scroll) | |
Bore × stroke | 82.5 mm × 92.8 mm | |
Power output | 169 kW (230 PS) @ 5,000–6,500 rpm | |
Torque | 370 Nm @ 1,600–4,300 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single twin-scroll turbo (Honeywell GT1749V with e-actuator) | |
Timing system | Chain (front-mounted; revised guide design post-2023) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 114 kg |
The Audi CLJA was used across Audi's B9/F5/FY platforms with longitudinal mounting and integrated MHEV control. This engine received platform-specific adaptations-revised cooling routing in the Q5 and updated EGR calibration in the A5-and from 2023 the facelifted A4 adopted the CZJC variant with revised valve timing, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The CLJA delivers strong performance and good efficiency, but early models (2021–2022) had reliability concerns, especially fuel injector coking. Later revisions (post-2023) improved injector durability, so well-maintained examples can be quite robust. Regular servicing and using high-quality oil (0W-20 VW 504 00) and RON 98 fuel greatly aid longevity.
The biggest issues are fuel injector coking (leading to misfires or rough idle), turbo wastegate actuator sticking, and GPF clogging affecting regeneration. Other complaints include oil leaks from gaskets and occasional MHEV belt tensioner faults. These are well-documented in Volkswagen Group service bulletins.
This 2.0L petrol was used in the Audi A4 (B9), A5 (F5), A6 (C8), and Q5 (FY) between 2021 and 2025. All applications were designated 45 TFSI and met Euro 6d-TEMP emissions standards. It was phased out in favour of the CZJC and CZRB variants in post-facelift models.
Aftermarket ECU tuning is common on the CLJA 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.
Good for its class. In an A5 45 TFSI (2022), typical consumption is ~9.2 L/100km (city) and ~6.4 L/100km (highway), or about 37 mpg UK combined. Real-world figures depend on driving style, but expect 34–40 mpg (UK) on mixed roads for a healthy CLJA engine.
Yes. The EA888 series (like most modern Audis) is an interference engine. If the timing chain fails, pistons can strike open valves, causing catastrophic engine damage. Chain maintenance is critical—any warning rattles should be addressed immediately.
Audi specifies a 0W-20 synthetic oil meeting VW 504 00 (petrol) or 507 00 (multi-vehicle) specification. Always use a high-quality low-viscosity oil designed for turbocharged direct-injection engines and change it every 15,000 km or annually to ensure proper injector and chain lubrication and prevent sludge buildup.
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