The Audi CMFA is a 1,984 cc, inline-four turbocharged petrol engine produced between 2018 and 2024. It belongs to the Volkswagen Group's EA888 Gen 4 engine family, designed for high efficiency and performance with TFSI (Turbo Fuel Stratified Injection) technology. Featuring direct fuel injection, variable valve timing, and a twin-scroll turbocharger, it delivers 140 kW (190 PS) and 320 Nm of torque, with enhanced thermal management and improved emissions control.
Fitted to models including the Audi A4 (B9), A5 (B9), and Q5 (FY), the CMFA was engineered for responsive driving dynamics and real-world fuel economy. Emissions compliance is achieved via exhaust gas recirculation (EGR), a gasoline particulate filter (GPF), and advanced engine management, enabling full Euro 6d-TEMP compliance across all markets.
One documented reliability concern is high-pressure fuel pump (HPFP) degradation under low-fuel conditions, highlighted in Audi Technical Service Bulletin 2019-09-07 (Ref. 616321). Premature wear is linked to fuel starvation and contaminated fuel. From 2021, revised HPFP calibration and updated fuel system components were introduced to improve durability and reduce failure rates.
All production years (2018–2024) comply with Euro 6d-TEMP standards depending on market (VCA UK Type Approval #VCA/EMS/9234).
The Audi CMFA is a 1,984 cc inline-four turbocharged petrol engine engineered for compact and mid-size passenger vehicles (2018–2024). It combines TFSI direct injection with a twin-scroll turbocharger to deliver responsive low-end torque and efficient highway cruising. Designed to meet Euro 6d-TEMP emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 82.5 mm × 92.8 mm | |
| Power output | 140 kW (190 PS) @ 4,200–6,000 rpm | |
| Torque | 320 Nm @ 1,500–4,200 rpm | |
| Fuel system | Bosch HDP6 high-pressure direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water-cooled with dual-circuit thermal management | |
| Turbocharger | Single twin-scroll turbo (BorgWarner) | |
| Timing system | Roller chain (long-life, non-serviceable) | |
| Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
| Dry weight | 141 kg |
The twin-scroll turbo provides strong low-RPM torque ideal for responsive driving but requires strict adherence to 15,000 km oil change intervals using VW 502 00/505 00 oil to prevent carbon buildup and turbo bearing wear. The Bosch HDP6 HPFP is sensitive to low fuel levels and poor-quality petrol, increasing risk of cavitation and failure. GPF-equipped models require periodic regeneration and diagnostics. Intake valves are prone to carbon buildup due to port oiling and lack of fuel washing, necessitating walnut blasting every 60,000–80,000 km. Extended idling should be minimized to reduce thermal stress on the exhaust manifold.
Oil Specs: Requires VW 502 00 / 505 00 specification (Audi SIB 2018-10-04). ACEA C3 oils acceptable if VW-certified.
Emissions: Full Euro 6d-TEMP compliance applies to all production years (2018–2024) requiring GPF functionality and OBD monitoring (VCA Type Approval #VCA/EMS/9234).
Power Ratings: Measured under ECE R85 standards. Output varies slightly based on calibration and aftertreatment status (Audi TIS Doc. A51282).
Audi Technical Information System (TIS): Docs A51282, A51283, SIB 2019-09-07
VCA Type Approval Database (VCA/EMS/9234)
EU Regulation (EC) No 715/2007
The Audi CMFA was used across Audi's B9/FY platforms with longitudinal mounting and shared within the Volkswagen Group for transverse and longitudinal applications. This engine received platform-specific adaptations-twin-scroll turbo in the A4 B9 and revised EGR routing in the Q5 FY-and from 2020 the facelifted A5 B9.5 adopted updated emissions calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front cylinder block near the timing cover (Audi TIS A51282). The 8th VIN digit indicates engine family ('C' for EA888 series). All CMFA units feature a gasoline particulate filter (GPF) in the exhaust manifold. Critical differentiation from CJZA: CMFA has revised ECU mapping for improved cold-start emissions and updated HPFP calibration. Service parts require production date verification—intake manifolds before 06/2020 are incompatible with later carbon-resistant variants (Audi SIB 2020-02-10).
The CMFA's primary reliability risk is high-pressure fuel pump (HPFP) failure, with elevated incidence in urban-driven vehicles with frequent short trips. Internal Audi field reports from 2020 indicated a measurable increase in HPFP replacements on units with inconsistent fuel levels, while UK DVSA data shows intake carbon buildup contributing to emissions-related MOT failures. Extended oil intervals and low tank levels exacerbate fuel system stress, making adherence to VW 502 00 oil and tank management critical.
Analysis derived from Audi technical bulletins (2018-2021) and UK DVSA failure statistics (2020-2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CMFA.
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