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 efficienc…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The CJXF is generally reliable when maintained properly, though pre-2017 models are prone to HPFP issues. Later revisions improved pump durability. Regular oil changes with VW 504 00 oil, EGR cleaning, and timely timing belt replacement are essential. Well-maintained units can exceed 250,000 km reliably.
Key issues include HPFP failure (especially on early models), timing belt wear beyond service interval, oil leaks from valve cover gaskets, and DPF clogging due to short-trip driving. These are documented in Audi SIBs 2016-012 and 2017-022 and require OEM-recommended maintenance to prevent.
The CJXF was used in the Audi A3 (8V, 2015–2020), A4 B9 (2015–2020), Q3 (8U, 2015–2018), and TT (FV, 2016–2020) as the 2.0 TDI 150 PS. It is part of the EA288 family and shares architecture with Volkswagen Group models. All variants meet Euro 6b emissions standards.
Yes. The CJXF responds well to ECU remapping, with stage 1 tunes safely achieving 170–185 PS. The stock turbo and internals handle moderate increases, but upgraded cooling and fuel system components are recommended for higher outputs. Tuning should not exceed 190 PS without hardware upgrades.
Excellent. In an A4 2.0 TDI (B9), real-world consumption averages 5.0 L/100 km (56 mpg UK) combined. Highway driving can achieve 4.3 L/100 km (65 mpg UK). Expect 50–56 mpg UK in mixed conditions. Economy is sensitive to driving style and EGR/DPF health.
Yes. The CJXF is an interference engine. If the timing belt fails or skips, pistons will contact open valves, causing catastrophic internal damage. Adhering to the 180,000 km or 10-year replacement interval per Audi SIB 2016-012 is absolutely critical.
Audi specifies VW 504 00 or 507 00 (SAE 5W-30) low-ash oil. This is mandatory to protect the HPFP, injectors, and DPF. Change every 15,000 km or annually. Using incorrect oil can lead to fuel system damage and DPF clogging.
Comprehensive technical documentation and regulatory references
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AUDI Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
VCA Certification Portal
Type-approval guidance and documentation.
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