The Audi CXSA petrol engine is a 1,984 cc, inline — four turbocharged unit produced between 2019 and 2023. It features direct fuel injection (TSI), variable valve timing (VVT), and dual overhead camshafts (DOHC). Delivering 140 kW (190 PS) in standard tune, with peak torque of 320 Nm available from 1,500–4,000 rpm, this engine was engineered for responsive performance and refined driving dynamics in compact and mid — size Audi models.
Fitted across the A3 (8Y), A4 (B9), and…
All CXSA models (2019–2023) meet Euro 6d emissions standards with GPF-assisted aftertreatment (VCA UK Type Approval #VCA/EMS/8901).
The Audi CXSA petrol is a 1,984 cc inline-four turbocharged engine engineered for compact and mid-size models (2019–2023). It combines TSI direct injection with a single-scroll turbocharger to deliver responsive low-end torque and smooth high-RPM power. Designed to meet Euro 6d emissions standards, it balances performance with regulated environmental compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 82.5 mm × 92.8 mm | |
Power output | 140 kW (190 PS) @ 4,200–6,000 rpm | |
Torque | 320 Nm @ 1,500–4,000 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single-scroll turbo (BorgWarner KP39) | |
Timing system | Double-row roller chain (long-life design) | |
Oil type | Audi Longlife-18 (SAE 5W-30) | |
Dry weight | 156 kg |
The Audi CXSA was used across Audi's 8Y/B9/F3 platforms with longitudinal mounting. This engine received platform-specific adaptations-shorter intake manifolds in the A3 (8Y) and revised EGR routing in the Q3 (F3)-and from 2019 the facelifted A4 B9 adopted GPF-integrated exhaust systems, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CXSA's primary reliability risk is high-pressure fuel injector coking, with elevated incidence in short-trip urban use. Internal Audi service data from 2022 indicated over 18% of pre-2021 units required injector cleaning before 80,000 km, while UK DVSA MOT records show misfire-related faults contributing to emissions test failures. Stop-start driving and cooler climates increase deposit formation, making proactive maintenance and correct fuel usage critical.
Analysis derived from Audi technical bulletins (2019-2023) and UK DVSA failure statistics (2020-2023). 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 CXSA engine is generally robust when maintained properly. Early models (2019–2020) are prone to fuel injector coking if used predominantly for short trips. Later units (post-2021) with improved ECU calibration show better longevity. Using Audi Longlife-18 oil and premium petrol significantly enhances reliability beyond 150,000 km.
Top issues include high-pressure fuel injector coking, GPF saturation, turbo wastegate sticking, and timing chain tensioner wear. These are documented in Audi SIBs and field reports. Injector-related faults are most frequent in urban-driven models. Regular cleaning and correct fuel usage mitigate most risks.
The CXSA engine was used in the A3 (8Y), A4 (B9), A5 (F5), and Q3 (F3) from 2019 to 2023. Key variant is the 2.0 TFSI 190 PS. All models feature GPF and meet Euro 6d standards. It was not used in performance (S/RS) trims or earlier platform generations.
Yes, the CXSA responds well to ECU remapping. Stage 1 tunes typically yield +40–60 kW safely, as stock internals handle increased torque. However, over-tuning can accelerate GPF and turbo wear. Supporting mods (intercooler, exhaust) are recommended for higher stages. Always use reputable tuners familiar with Audi petrol systems.
In combined driving, the CXSA achieves 6.8–7.5 L/100km (39–41 mpg UK). Highway consumption can drop to ~6.0 L/100km (47 mpg), while city driving may reach 9.0 L/100km. Real-world figures depend on driving style, but it remains one of Audi's most balanced 2.0L petrol engines of its era.
Yes. The CXSA is an interference engine. If the timing chain fails or jumps, piston-to-valve contact will occur, causing severe internal damage. Although the chain is designed for life, any signs of wear or noise must be investigated immediately to prevent catastrophic failure.
Audi specifies SAE 5W-30 oil meeting Longlife-18 standards. This low-ash formulation protects the GPF and turbocharger from contamination. Oil changes should occur every 15,000 km or annually. Using non-compliant oil risks sludge buildup and aftertreatment damage.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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