The Audi CMUA is a 1,984 cc, inline — four turbocharged petrol engine produced between 2019 and 2023. It belongs to the Volkswagen Group's EA888 engine family (Gen 4), featuring direct fuel injection (TSI), variable valve timing (VVT), and dual overhead camshafts (DOHC). In standard tune, it produces 140 kW (190 PS) and 320 Nm of torque, delivering responsive performance and strong mid — range driveability.
Fitted to models including the 8W A5, 8XC A6, and 8X A7, the CMUA was…
Production years 2019–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/6794).
The Audi CMUA is a 1,984 cc inline-four turbo-petrol engine developed for longitudinal-platform applications (2019–2023). It combines turbocharging with dual injection (direct + port) to deliver smooth power delivery and strong mid-range torque. Designed to meet Euro 6d emissions standards, it balances performance with improved fuel efficiency and reduced particulate emissions.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol | |
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 @ 1,450–4,200 rpm | |
Fuel system | TSI: Direct + port injection (Bosch HDEV6) | |
Emissions standard | Euro 6d | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single-scroll turbo (Honeywell GT1749V) | |
Timing system | Chain-driven (double-row, front-mounted) | |
Oil type | Audi Longlife 04 (SAE 5W-30) | |
Dry weight | 145 kg |
The Audi CMUA was used across Audi's B9.5/4H platforms with longitudinal mounting and shared with Volkswagen and SEAT under Group platform strategy. This engine received platform-specific calibrations-tuned intake manifolds in the A6 and revised cooling in the A7-and from 2021 the facelifted A5 Sportback adopted revised emissions mapping, creating minor software incompatibilities. All adaptations are documented in OEM technical bulletins.
The CMUA's primary reliability risk is high-pressure fuel pump cam wear on early builds, with elevated incidence in city driving with frequent cold starts. Internal Audi reports from 2020 indicated a significant number of pre-2020 engines required HPFP replacement before 100,000 km, while UK DVSA records show increased misfire-related MOT failures in urban areas. Short trips and delayed oil changes accelerate wear, making oil quality and interval adherence critical.
Analysis derived from Audi technical bulletins (2019-2022) 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 CMUA delivers responsive performance and good efficiency, but early models (2019–2020) had reliability concerns, particularly HPFP cam wear. Later revisions (post-2021) improved pump durability, so well-maintained examples can be robust. Regular servicing and using high-quality oil (5W-30 Audi Longlife 04) significantly enhance longevity.
The most common issues are high-pressure fuel pump cam wear, turbo wastegate sticking, intake carbon buildup, and coolant leaks from the thermostat housing. These are documented in Audi service bulletins and supported by DVSA failure data. Preventative maintenance is key to avoiding major repairs.
The CMUA 2.0 TFSI was used in the Audi A5 (8W), A6 (8XC), and A7 (8X) between 2019 and 2023. It was also shared with Volkswagen (Passat B8.5 2.0 TSI) under the VW Group platform strategy. All variants meet Euro 6d emissions standards.
Yes. The CMUA responds well to ECU remapping, with stage 1 tunes typically adding +40–50 kW safely. The stock turbo and internals handle increased boost well. Supporting mods like intercooler and exhaust upgrades allow further gains. Tuning should use premium fuel (RON 98) to prevent knock.
In real-world driving, the CMUA achieves approximately 7.9 L/100 km (city), 6.0 L/100 km (highway), or about 35–41 mpg UK combined. The A5 2.0 TFSI typically returns better economy than the A7 due to lower weight. Expect 35–45 mpg (UK) depending on driving style and conditions.
Yes. The CMUA is an interference engine. If the timing chain fails or jumps, the pistons can strike the open valves, causing catastrophic engine damage. Chain maintenance is critical—any unusual noise from the front of the engine should be investigated immediately.
Audi specifies 5W-30 synthetic oil meeting Audi Longlife 04 specification. Use only VW 502 00/505 00-compliant oil and change it every 15,000 km or annually to ensure HPFP lubrication and minimize carbon buildup. Extended intervals increase wear risk.
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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