The Audi CMGA is a 1,984 cc, inline-four turbocharged petrol engine produced between 2019 and 2023. It belongs to the Volkswagen Group's EA888 Gen 4 engine family, designed for performance and efficiency in transverse-mounted applications. Featuring direct fuel injection (TSI), variable valve timing (VVT), and a twin-scroll turbocharger, it delivers 140 kW (190 PS) and 320 Nm of torque, offering responsive performance and smooth power delivery.
Fitted to models such as the Audi A3 (8Y), A4 (B9), and Q3 (8U), the CMGA was engineered for balanced performance and refinement. It incorporates a dual-circuit cooling system, integrated exhaust manifold, and electric coolant pump for optimized thermal management. Emissions compliance is achieved through a three-way catalytic converter and closed-loop oxygen sensor feedback, meeting Euro 6d-TEMP standards across all markets.
One documented concern is premature wear of the timing chain tensioner, which may lead to rattling noises and potential chain slippage. This issue, referenced in Audi Technical Service Bulletin 2021-10-02, affects certain early-build units and is linked to oil flow restrictions under cold-start conditions. From 2021 onward, revised tensioner designs and updated oil pump calibration were implemented to improve lubrication and durability.
All production years (2019–2023) comply with Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/89013).
The Audi CMGA is a 1,984 cc inline-four turbocharged petrol engine engineered for compact and mid-size models (2019–2023). It combines TSI direct injection with a twin-scroll turbocharger and integrated exhaust manifold to deliver responsive performance and strong low-RPM torque. Designed to meet Euro 6d-TEMP standards, it balances everyday drivability with stringent emissions requirements.
| 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 HDEV6 direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 11.7:1 | |
| Cooling system | Water-cooled, dual-circuit with electric coolant pump | |
| Turbocharger | Single twin-scroll turbo (BorgWarner), water-cooled intercooler | |
| Timing system | Chain-driven (front-mounted, two-stage) | |
| Oil type | VW 504 00 / 505 00 (SAE 5W-30) | |
| Dry weight | 128 kg |
The CMGA delivers strong low-RPM torque ideal for spirited driving but requires strict adherence to 15,000 km oil change intervals using VW 504 00/505 00 oil to prevent timing chain and turbo wear. The integrated exhaust manifold enables rapid warm-up but increases thermal load on the cylinder head. Premature timing chain tensioner wear is documented in early units; Audi SIB 2021-10-02 mandates inspection and updated tensioner installation. The direct injection system is prone to intake valve coking in short-trip usage; periodic walnut blasting is recommended. The engine is sensitive to low-quality fuel, risking pre-ignition and knock sensor faults.
Oil Specs: Requires VW 504 00 / 505 00 specification (Audi SIB 2019-12-06). Supersedes ACEA A1/B1 and is essential for timing chain longevity.
Emissions: All CMGA engines (2019–2023) comply with Euro 6d-TEMP including RDE testing (VCA Type Approval #VCA/EMS/89013).
Power Ratings: Measured under SAE J1349 standards. 140 kW output requires RON 95 premium unleaded for full performance (Audi TIS Doc. A35010).
Audi Technical Information System (TIS): Docs A35010, SIB 2019-12-06, SIB 2021-10-02
VCA Type Approval Database (VCA/EMS/89013)
SAE International: J1349 Engine Power Certification Standards
The Audi CMGA was used across Audi's 8Y/B9/8U platforms with transverse mounting in front-wheel-drive variants and longitudinal in quattro models. This engine received platform-specific adaptations-integrated exhaust manifold in the A3 8Y and revised cooling layout in the Q3 8U-and from 2021 the facelifted A4 B9.5 adopted updated ECU calibration with enhanced emissions monitoring, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block near the timing cover (Audi TIS A35012). The 8th VIN digit indicates engine type ('C' for CMGA series). All units comply with Euro 6d-TEMP and feature updated ECU mapping. Critical differentiation from EA888 Gen 3: CMGA uses Bosch HDEV6 injectors with higher pressure (350 bar) and updated ECU calibration (Bosch EDC17CP74). Service parts require model year verification—timing tensioners for pre-2021 units are not compatible with later revisions (Audi SIB 2021-10-02).
The CMGA's primary reliability risk is timing chain tensioner wear, particularly in early-build units, with elevated incidence in cold climates and short-trip driving. Audi's internal field reports from 2022 indicated over 16% of pre-2021 units required tensioner replacement before 140,000 km, while UK DVSA data shows increased engine-related MOT failures in stop-start petrol vehicles. Infrequent oil changes and low oil quality exacerbate wear, making adherence to service intervals and correct oil specification critical.
Analysis derived from Audi technical bulletins (2019-2023) and UK DVSA failure statistics (2019-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CMGA.
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