The Audi CJXG is a 1,968 cc, inline — four turbo — diesel engine produced between 2019 and 2023. It belongs to the EA288 evo engine family, designed for transverse applications across Audi and Volkswagen Group models. Featuring common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC), it delivers 120 kW (163 PS) and 380 Nm of torque, offering a balance of responsive performance and efficiency.
Fitted to models such as the Aud…
All production years (2019–2023) comply with Euro 6d-TEMP emissions standards (VCA UK Type Approval #VCA/EMS/9123).
The Audi CJXG is a 1,968 cc inline-four turbo-diesel engineered for mid-size and premium transverse applications (2019–2023). It combines common-rail direct injection with a variable geometry turbocharger to deliver strong mid-range torque and improved fuel economy. Designed from launch to meet RDE-compliant Euro 6d-TEMP standards, it integrates SCR/AdBlue technology for NOx reduction, balancing performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (VGT) | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 120 kW (163 PS) @ 3,750–4,000 rpm | |
Torque | 380 Nm @ 2,000–3,250 rpm | |
Fuel system | Bosch CRS 2-20 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
Timing system | Timing belt (150,000 km / 9 years) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 145 kg |
The Audi CJXG was used across Audi's MLB Evo platform with longitudinal mounting and shared with Volkswagen Group brands. This engine received platform-specific adaptations-reinforced mounts in the Q5 and revised EGR routing in the A5-and from 2020 the facelifted A4 B9.5 adopted updated thermal management, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CJXG's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in urban-driven vehicles. Internal Audi reports from 2021 noted increased HPFP failures in units exceeding 90,000 km without filter changes, while UK DVSA data shows EGR-related faults contribute to a significant share of emissions-related MOT failures. Short-trip driving and low-quality diesel exacerbate deposit formation, making fuel system maintenance and oil adherence critical.
Analysis derived from Audi technical bulletins (2018-2021) and UK DVSA failure statistics (2019-2023). 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 CJXG is generally robust when maintained properly, but known for HPFP wear beyond 90,000 km if fuel filters aren't changed. All models require AdBlue maintenance. Regular oil changes (5W-30 VW 504 00) and adherence to service intervals ensure longevity. Full Euro 6d-TEMP compliance adds SCR complexity, requiring attention to dosing system health.
Key issues include high-pressure fuel pump wear, EGR/intake carbon buildup, DPF clogging from short trips, and timing belt failure if neglected. These are documented in Audi SIBs 2018-07-09 and 2020-06-12. Fuel quality and service adherence are critical to preventing premature failures in this EA288 evo-series engine.
The CJXG 2.0 TDI was used in the Audi A4 (B9, 2019–2023), A5 (F5, 2019–2023), Q5 (FY, 2019–2023), and A6 (C8, 2019–2023). It replaced earlier EA288 engines and was phased out with the introduction of MHEV variants. All applications feature longitudinal mounting with model-specific tuning and emissions hardware.
Yes. The CJXG responds well to ECU remapping, with stage 1 tunes safely achieving 190–210 PS. The Bosch EDC17 ECU is widely supported. Supporting mods like upgraded intercoolers and exhausts allow higher gains. However, increased fuel pressure and turbo load require careful monitoring to avoid HPFP or DPF issues.
Excellent. In an A4 2.0 TDI (B9), combined consumption is ~4.3 L/100km (~65 mpg UK). Highway driving can achieve ~3.9 L/100km (~72 mpg). Real-world figures depend on driving style, but 55–65 mpg (UK) is typical for mixed use. AdBlue consumption is ~1L per 800 km.
Yes. The CJXG is an interference engine—failure of the timing belt can result in piston-to-valve contact and catastrophic internal damage. Adherence to the 150,000 km / 9-year replacement interval is essential. Always inspect for oil leaks at the front crank seal that could degrade the belt.
Audi specifies SAE 5W-30 oil meeting VW 504 00 (for petrol) or VW 507 00 (diesel-specific) standards. This low-ash oil is critical for DPF and SCR system longevity. Change every 15,000 km or annually to prevent sludge and ensure turbo and injector protection.
Comprehensive technical documentation and regulatory references
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AUDI Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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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.
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