The Audi CNAA is a 1,968 cc, inline-four turbocharged diesel engine produced between 2022 and 2025. It belongs to the Volkswagen Group's EA288 Evo engine family, featuring aluminium construction, common rail direct injection, and dual overhead camshafts. Delivering 85 kW (116 PS) and 300 Nm of torque, it integrates a 48V mild-hybrid system (MHEV) to enhance efficiency and reduce emissions without compromising drivability.
Fitted to models such as the Audi A3 (8Y), A4 (B9), and Q3 (GQ), the CNAA engine was engineered for balanced daily performance with improved real-world fuel economy. Its emissions compliance is achieved through a multi-stage aftertreatment system including exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, meeting Euro 6d-TEMP standards across its production run.
One documented concern is high-pressure fuel pump (HPFP) wear under extended service intervals, highlighted in Volkswagen Group Technical Service Bulletin 2023-02-08. The issue stems from plunger wear due to low lubricity in lower-quality diesel fuels and infrequent highway operation. From 2024, revised HPFP internals and updated fuel specifications were implemented to improve durability.
Production years 2022–2025 meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/9915).
The Audi CNAA is a 1,968 cc inline-four turbocharged diesel engine engineered for compact and mid-size Audi models (2022–2025). It combines common rail injection with variable geometry turbocharging and a 48V MHEV system to deliver responsive torque and emissions compliance. Designed for Euro 6d-TEMP, it supports both city and highway driving profiles with active regeneration and AdBlue dosing.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,968 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (variable geometry) | |
| Bore × stroke | 81.0 mm × 95.5 mm | |
| Power output | 85 kW (116 PS) @ 3,250–4,000 rpm | |
| Torque | 300 Nm @ 1,750–3,000 rpm | |
| Fuel system | Bosch CRS 2-20 common rail (up to 2,200 bar) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 16.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (Honeywell VNT18) | |
| Timing system | Chain (front-mounted; revised guide design post-2024) | |
| Oil type | VW 504 00 / 507 00 (SAE 0W-20) | |
| Dry weight | 146 kg |
The VGT turbo and 48V MHEV system provide strong low-RPM torque ideal for urban driving but require strict adherence to 15,000 km or annual oil changes to prevent HPFP and turbo degradation. VW 504 00 (0W-20) oil is critical due to its low-viscosity formulation supporting the MHEV belt-driven starter-generator and chain lubrication. The Bosch CRS 2-20 fuel system demands ultra-low-sulfur diesel (ULSD) meeting EN 590 standards to prevent high-pressure pump wear. Post-2024 models feature revised HPFP internals; pre-2024 units should follow VW TSB 2023-02-08 for inspection intervals. SCR system longevity depends on regular highway runs to maintain AdBlue dosing efficiency and prevent injector coking.
Oil Specs: Requires VW 504 00 / 507 00 (0W-20) specification (Audi SIB 2024-03-10). Supersedes ACEA C5.
Emissions: Euro 6d-TEMP certification applies to all CNAA models (VCA Type Approval #VCA/EMS/9915). No Euro 6c or earlier variant exists.
Power Ratings: Measured under SAE J1349 standards. Output requires ULSD and full MHEV functionality (Audi TIS Doc. A16500).
Audi Technical Information System (TIS): Docs A16200, A16340, A16410, SIB 2024-03-10
VCA Type Approval Database (VCA/EMS/9915)
SAE International: J1349 Engine Power Certification Standards
The Audi CNAA was used across Audi's 8Y/B9/GQ platforms with transverse or longitudinal mounting and integrated MHEV control. This engine received platform-specific adaptations-revised cooling routing in the Q3 and updated EGR calibration in the A4-and from 2024 the facelifted A3 adopted the CZRB variant with revised valve timing, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side cylinder block near the exhaust manifold (Audi TIS A16220). The 8th VIN digit indicates engine family ('B' for EA288 2.0 TDI). Pre-2024 models have silver valve covers with black plastic cam covers; post-2024 units use black valve covers. Critical differentiation from CZRB: Original CNAA has Bosch EDC17CP56 ECU with 80-pin connector, while CZRB uses EDC17CP66 with 100-pin. Service parts require production date verification - HPFP and DPF assemblies for engines before 06/2024 are incompatible with later units due to internal redesign (VW TSB 2023-02-08).
The CNAA's primary reliability risk is high-pressure fuel pump wear on early builds, with elevated incidence in urban short-trip use. Internal Volkswagen quality reports from 2024 indicated a significant number of pre-2024 engines requiring HPFP replacement before 80,000 km, while UK DVSA records link a notable portion of emissions-related MOT failures to DPF saturation in frequently cold-driven vehicles. Frequent cold starts and extended oil intervals increase HPFP and turbo stress, making oil quality and interval adherence critical.
Analysis derived from Audi technical bulletins (2022–2025) and UK DVSA failure statistics (2023–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CNAA.
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