The Audi CN is a 1,968 cc, inline — four turbocharged diesel engine produced between 2023 and 2025. It belongs to the Volkswagen Group’s EA288 Evo engine family, featuring modular diesel architecture, dual — loop EGR, and a variable geometry turbocharger (VGT) with electric assist. In its standard configuration, it produces 100 kW (136 PS) and 320 Nm of torque, with optimized combustion efficiency and reduced NOx emissions through Bosch CRS4 high — pressure injection.
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All CN variants meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9114).
The Audi CN is a 1,968 cc inline-four turbocharged diesel engine from the EA288 Evo family (2023–2025). 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 compact and 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 | 100 kW (136 PS) @ 3,250–4,200 rpm | |
Torque | 320 Nm @ 1,600–2,750 rpm | |
Fuel system | Bosch CRS4 common-rail (up to 2,500 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 | 147 kg |
The Audi CN was used across Audi's 8Y/B10 platforms with transverse mounting and shared architecture with Volkswagen Group siblings. This engine received platform-specific adaptations-revised intake tracts in the A3 and enhanced cooling in the Q3-and from 2024 received updated fuel system components, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CN'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 2025 indicated a notable share of pre-2024 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 (2023-2025) and UK DVSA failure statistics (2024-2025). 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 CN delivers strong performance and good efficiency, but early models (2023-2024) had reliability concerns, especially high-pressure fuel pump wear. Later revisions (post-2024) improved pump durability, so well-maintained examples can be quite robust. Regular servicing and using high-quality oil (0W-30 VW 507 00) greatly aid longevity.
The biggest issues are high-pressure fuel pump wear (leading to misfires or hard starting), EGR valve clogging, and intake swirl flap failure. Other complaints include oil leaks from gaskets and occasional DPF regeneration issues. These are well-documented in Audi service bulletins.
This 2.0L diesel was used in the Audi A3 (8Y), A4 (B10), and Q3 (facelift) from 2023 to 2025. It was primarily offered as the 30 TDI variant. The engine is part of the EA288 Evo family shared across Volkswagen Group brands but remains specific to Audi's compact and mid-size lineup in this power output.
Yes. The CN is highly tunable. ECU remaps routinely gain +30-50 kW safely on stage 1, as the stock internals handle increased torque well. Aftermarket upgrades (intercooler, exhaust, intake) can further boost output. Enthusiasts frequently remap A3 and Q3 models for sharper throttle response. Tuning should be done carefully with supporting modifications to avoid overstressing the fuel system.
Very competitive. In an A3 30 TDI (100 kW) from 2024, typical consumption is ~5.8 L/100km (city) and ~4.6 L/100km (highway), or about 49 mpg UK combined. Real-world figures depend on driving style, but expect 46-51 mpg (UK) on mixed roads for a healthy CN engine.
Yes. The EA288 series (like most modern Audis) is an interference engine. This means if the timing chain jumps or breaks, pistons can strike open valves, causing catastrophic engine damage. That's why chain maintenance is critical - any warning rattles should be addressed immediately.
Audi specifies a 0W-30 synthetic oil meeting VW 507 00 (diesel) or 505 00 (multi-vehicle) specification. Always use a quality oil designed for turbocharged diesel engines and change it at regular intervals (around 15,000 km or as Audi recommends) to ensure proper fuel pump and turbo lubrication.
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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