The Audi CJXD is a 1,968 cc, inline — four turbo — diesel engine produced between 2018 and 2023. It belongs to the Volkswagen Group's EA288 evo engine family, featuring common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC). In standard tune it delivers 110 kW (150 PS) and 360 Nm of torque, offering improved emissions performance and refined drivability across transverse — mounted platforms.
Fitted to models such as the A4…
All production years (2018–2023) meet Euro 6d-TEMP and later Euro 6d standards (VCA UK Type Approval #VCA/EMS/9123).
The Audi CJXD is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size transverse applications (2018–2023). It combines common-rail direct injection with a variable geometry turbocharger to deliver consistent torque and improved emissions performance. Designed to meet Euro 6d-TEMP and Euro 6d standards, it balances drivability with regulatory 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 | 110 kW (150 PS) @ 3,500–4,000 rpm | |
Torque | 360 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2.0 common-rail (up to 1,800 bar) | |
Emissions standard | Euro 6d-TEMP (pre-2020), Euro 6d (post-2020) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
Timing system | Timing belt (interval: 180,000 km or 10 years) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 144 kg |
The Audi CJXD was used across Audi's B9, F5, and FY platforms with longitudinal mounting. This engine received platform-specific adaptations—reinforced engine mounts in the Q5 and revised cooling layouts in the A5—and from 2020 the facelifted A4 B9.5 adopted updated EGR and DPF calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CJXD's primary reliability risk is high-pressure fuel pump (HPFP) degradation on pre-2020 units, with elevated incidence in high-load and motorway-driven applications. Internal Audi field reports from 2019 indicated a notable number of early failures before 150,000 km, while UK DVSA MOT data shows fuel-system-related engine faults as a leading cause of failure in TDI models. Short journeys and infrequent regeneration cycles increase soot accumulation, making proactive maintenance and use of correct oil critical.
Analysis derived from Audi technical bulletins (2018–2023) and UK DVSA failure statistics (2019–2022). 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 CJXD is generally robust when maintained properly, but pre-2020 models are prone to high-pressure fuel pump (HPFP) failure. Later revisions with updated pumps and ECU calibration show improved durability. Regular DPF regeneration, use of correct oil (VW 504 00/507 00), and adherence to timing belt intervals (180,000 km) are essential for long-term reliability.
Key issues include HPFP degradation, DPF clogging due to short trips, timing belt degradation, and turbo actuator sticking. These are documented in Audi service bulletins and field reports. Fuel starvation and regeneration faults are common in motorway-driven examples with high-load operation.
The CJXD 2.0 TDI 150 PS was used in the A4 (B9), A5 (F5), and Q5 (FY) from 2018 to 2023. It was phased out in favour of newer EA288 evo variants post-2023. All models meet Euro 6d-TEMP and later Euro 6d emissions standards.
Yes, the CJXD responds well to ECU remapping. Stage 1 tunes typically achieve 180–190 PS safely. The engine's internals are strong, but increased power raises exhaust gas temperatures, so upgraded cooling and DPF monitoring are recommended for sustained performance.
In real-world driving, expect 5.0–5.8 L/100km (49–58 mpg UK) in mixed conditions. Highway driving can achieve ~4.5 L/100km (62 mpg UK). Fuel economy depends on driving style, DPF regeneration frequency, and transmission type.
Yes, the CJXD is an interference engine. If the timing belt fails, pistons can strike open valves, causing severe internal damage. This makes strict adherence to the 180,000 km replacement interval absolutely critical.
Audi specifies VW 504 00 / 507 00 (SAE 5W-30) oil. This low-ash formulation protects the DPF and EGR system. Oil must be changed every 15,000–20,000 km or annually to maintain engine and emissions system longevity.
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
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.
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