The Audi CJEB is a 1,968 cc, inline-four turbocharged diesel engine produced between 2021 and 2024. It belongs to the Volkswagen Group’s EA288 Evo engine family, featuring modular diesel system architecture, dual-loop EGR, and a variable geometry turbocharger (VGT). In its standard configuration, it produces 110 kW (150 PS) and 360 Nm of torque, with optimized combustion efficiency and reduced NOx emissions through precise common-rail injection.
Fitted primarily to the Audi A4 (B9.5), A5 (B9.5), and Q5 (facelift) in 35 TDI trim, the CJEB was engineered for balanced performance and improved real-world efficiency. It supports cylinder deactivation (ACT) under light load and integrates with a 12 V mild-hybrid system (MHEV) to enhance stop-start functionality and reduce urban emissions. Driving characteristics emphasize smooth refinement and strong low-end pull, meeting Euro 6d emissions standards across its production run.
One documented concern is premature high-pressure fuel pump (HPFP) wear in early production units, highlighted in Audi Service Information Bulletin 2022-07-04. This issue stems from inadequate lubrication under extended oil change intervals. In 2023, Audi issued revised HPFP components and updated oil service protocols to improve long-term reliability.
All CJEB variants meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9108).
The Audi CJEB is a 1,968 cc inline-four turbocharged diesel engine from the EA288 Evo family (2021–2024). It integrates dual-loop EGR, VGT, and MHEV technology to deliver responsive performance with reduced emissions. Designed for Euro 6d compliance, it balances economy and refinement in Audi’s mid-size lineup.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,968 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged with variable geometry turbocharger (VGT) | |
| Bore × stroke | 81.0 mm × 95.5 mm | |
| Power output | 110 kW (150 PS) @ 3,250–4,200 rpm | |
| Torque | 360 Nm @ 1,600–2,750 rpm | |
| Fuel system | Bosch CRS2.0 common-rail (up to 2,200 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 16.5:1 | |
| Cooling system | Water-cooled with dual-circuit thermal management | |
| Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
| Timing system | Chain (reinforced; front-mounted with improved tensioner) | |
| Oil type | VW 507 00 / 505 00 (SAE 0W-30) | |
| Dry weight | 148 kg |
The VGT and common-rail injection provide strong low-RPM response ideal for urban driving but require strict adherence to 15,000 km oil change intervals to prevent high-pressure fuel pump wear and turbo bearing degradation. VW 507 00 (0W-30) oil is critical due to its low viscosity and protection of the HPFP and turbocharger. Extended idling and cold starts increase stress on the fuel system. The CRS2.0 pump demands ultra-low-sulfur diesel (ULSD) meeting EN 590 standards to prevent injector coking. Post-2023 models feature revised fuel pumps; pre-2023 units should follow Audi SIB 2022-07-04 for inspection. EGR and DPF systems require periodic cleaning to maintain emissions compliance and prevent limp-mode events.
Oil Specs: Requires VW 507 00 / 505 00 (0W-30) specification (Audi SIB 2023-04-11). Supersedes ACEA C5.
Emissions: All CJEB models are certified to Euro 6d standards (VCA Type Approval #VCA/EMS/9108).
Power Ratings: Measured under SAE J1349 standards. 110 kW output requires EU5+ diesel (Audi TIS Doc. A28800).
Audi Technical Information System (TIS): Docs A28800, A28801, SIB 2022-07-04
VCA Type Approval Database (VCA/EMS/9108)
SAE International: J1349 Engine Power Certification Standards
The Audi CJEB was used across Audi's B9.5 platform with longitudinal mounting and shared architecture with Volkswagen Group siblings. This engine received platform-specific adaptations-revised intake tracts in the A4 and enhanced cooling in the Q5-and from 2023 received updated fuel system components, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-side cylinder block near the exhaust manifold (Audi TIS A28800). The 8th VIN digit indicates engine family ('D' for EA288 series). Pre-2023 models have silver valve covers with black plastic timing covers; post-2023 units use black valve covers. Critical differentiation from CKRA: CJEB includes MHEV integration and revised EGR routing. Service parts require production date verification - fuel pumps for engines before 07/2022 are incompatible with later units due to internal redesign (Audi SIB 2022-07-04).
The CJEB's primary reliability risk is high-pressure fuel pump wear on early builds, with elevated incidence in mixed urban/highway use. Internal Audi quality reports from 2024 indicated a notable share of pre-2023 engines requiring HPFP replacement before 100,000 km, while UK DVSA records link a significant portion of emissions-related MOT failures to EGR clogging in city-driven vehicles. Cold-start cycles and extended idling increase fuel system stress, making oil quality and interval adherence critical.
Analysis derived from Audi technical bulletins (2021-2024) and UK DVSA failure statistics (2022-2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CJEB.
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