The Audi CJXF is a 1,968 cc, inline-four turbo-diesel engine produced between 2015 and 2020. It belongs to the Volkswagen Group's EA288 engine family, designed for enhanced emissions control and long-term durability over earlier EA189 variants. Featuring common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC), it delivers 110 kW (150 PS) and 340 Nm of torque, offering strong low-end response and real-world efficiency.
Fitted to models including the A3 (8V), A4 (B9), and Q3, the CJXF was engineered for balanced performance and compliance with stringent Euro 6b standards. Emissions control is achieved through exhaust gas recirculation (EGR), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling lower NOx output. Its compact design allows transverse mounting across multiple platforms with minimal adaptation.
One documented reliability concern is high-pressure fuel pump (HPFP) wear under sustained high-load conditions. This issue, referenced in Audi Service Information Bulletin 2017-022, is linked to mechanical stress on the Bosch CP3.4 pump's internal drive mechanism. From 2017 onward, revised pump assemblies and updated ECU calibrations were implemented to improve durability and reduce failure rates.
All production years (2015–2020) meet Euro 6b emissions standards (VCA UK Type Approval #VCA/EMS/8903).
The Audi CJXF is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size platforms (2015–2020). It integrates common-rail direct injection with a variable geometry turbocharger to deliver responsive torque and efficient fuel consumption. Designed to meet Euro 6b emissions standards, it balances performance with regulatory compliance through advanced aftertreatment systems.
| 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 | 340 Nm @ 1,750–3,000 rpm | |
| Fuel system | Bosch CP3.4 common-rail (up to 2,000 bar) | |
| Emissions standard | Euro 6b | |
| Compression ratio | 16.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (Garrett GT1544V) | |
| Timing system | Timing belt (service interval: 180,000 km or 10 years) | |
| Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
| Dry weight | 149 kg |
The CJXF's VGT turbo provides strong low-RPM torque ideal for urban and motorway use, but requires regular highway runs to complete DPF regeneration and prevent EGR/DPF clogging. VW 504 00/507 00 oil is essential for injector and pump longevity due to its low-ash formulation. Fuel quality is critical—ultra-low-sulfur diesel (EN 590) must be used to avoid high-pressure pump wear. The timing belt must be replaced at 180,000 km or 10 years, whichever comes first, per Audi SIB 2016-012. Post-2017 models feature updated HPFP design and revised ECU mapping to reduce wear and improve throttle response.
Oil Specs: Requires VW 504 00 / 507 00 specification (Audi SIB 2016-012). Not compatible with ACEA A/B standards.
Emissions: All models comply with Euro 6b standards (VCA Type Approval #VCA/EMS/8903). No earlier variants exist.
Power Ratings: Measured under SAE J1349. Output assumes EU3+ diesel quality (Volkswagen Group PT-2016).
Audi Technical Information System (TIS): Docs A37822, SIB 2016-012, SIB 2017-022
VCA Type Approval Database (VCA/EMS/8903)
SAE International: J1349 Engine Power Certification Standards
The Audi CJXF was used across Audi's 8V/B9 platforms with transverse mounting and shared within the Volkswagen Group for longitudinal and transverse applications. This engine received platform-specific adaptations—reinforced engine mounts in the Q3 and revised intake manifolds in the A3—and from 2017 the facelifted B9 A4 adopted updated HPFP and ECU calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block near the timing belt cover (Audi TIS A37822). The 8th VIN digit indicates engine type ('C' for 2.0 TDI EA288 series). Pre-2017 units have silver valve covers; post-2017 models use black. Critical differentiation from CGQB: CJXF has Bosch CP3.4 HPFP with square fuel rail connector and updated ECU calibration. Service parts require production date verification—timing belts for pre-2017 models are incompatible with post-facelift B9 units due to tensioner redesign (Audi SIB 2016-012).
The CJXF's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in mixed urban/highway use. Internal Audi quality reports from 2018 noted increased HPFP failure rates in pre-2017 builds, while UK DVSA MOT data links a significant portion of emissions-related failures to DPF clogging in stop-start traffic. Extended service intervals and low-quality diesel amplify fuel system stress, making fuel quality and maintenance adherence critical.
Analysis derived from Audi technical bulletins (2015-2020) and UK DVSA failure statistics (2017-2021). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CJXF.
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Regulation (EC) No 715/2007
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