The Audi DEUB is a 1,984 cc, inline-four turbocharged petrol engine produced between 2020 and 2023. Part of the Volkswagen Group's EA888 evo4 engine family, it features a transverse-mounted configuration with a twin-scroll turbocharger, Bosch HDEV6 direct injection operating at up to 350 bar, and a 12 V mild-hybrid system (MHEV) with belt-driven starter-generator (BSG). Delivering 140 kW (190 PS) and 320 Nm, it combines responsive low-end torque with enhanced efficiency through energy recuperation and coasting functionality.
Fitted to models including the Audi A4 (B9), A5 (B9), and Q5 (FY), the DEUB was engineered for dynamic performance and real-world emissions compliance. It meets Euro 6d RDE standards via a three-way catalyst, gasoline particulate filter (GPF), and thermal management system with map-controlled thermostat and electric coolant pump.
One documented concern is high-pressure fuel injector coking in certain early-production units due to low-sulfur petrol and frequent short-trip driving. This issue, addressed in Audi Technical Service Bulletin 2022-05-02, led to revised fuel system cleaning intervals and updated injector coatings. From 2022 onward, enhanced fuel formulations and software updates improved long-term reliability across the EA888 evo4 series.
All DEUB engines comply with Euro 6d RDE standards (VCA UK Type Approval #VCA/EMS/9877).
The Audi DEUB is a 1,984 cc inline-four turbocharged petrol engine designed for transverse mid-size and premium SUV applications (2020–2023). It combines twin-scroll turbocharging with Bosch HDEV6 direct injection and a 12 V mild-hybrid system to deliver strong low-RPM response and improved real-world efficiency. Engineered to meet Euro 6d RDE standards, it balances performance with emissions compliance through advanced thermal management and particulate filtration.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll, electric wastegate) | |
| 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 (RDE compliant) | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled with map-controlled thermostat and electric pump | |
| Turbocharger | Single twin-scroll turbo with electric actuator (Garrett GT2260VRS) | |
| Timing system | Chain-driven (interference design) | |
| Oil type | VW 504 00 / 505 00 (SAE 5W-30) | |
| Dry weight | 132 kg |
The twin-scroll turbo provides strong low-RPM torque ideal for city driving but demands use of VW 504 00 oil to protect the turbocharger and GPF. The HDEV6 fuel system requires TOP TIER petrol meeting EN 228 with proper detergents to prevent injector coking, particularly in early DEUB units. The 12 V MHEV system enables coasting and energy recuperation, improving real-world fuel economy by up to 6%. The interference valvetrain requires strict adherence to 180,000 km or 10-year timing chain inspection intervals. Real-driving emissions (RDE) compliance depends on consistent highway regeneration to maintain GPF efficiency and prevent clogging.
Oil Specs: Requires VW 504 00 / 505 00 specification (Audi SIB 2020-08-01). Not compatible with ACEA A/B oils.
Emissions: All DEUB engines meet Euro 6d RDE standards (VCA Type Approval #VCA/EMS/9877), including PEMS testing under real-world conditions.
Power Ratings: Measured under ECE R85 standards. Output de-rated if GPF differential pressure threshold exceeded (Audi TIS A58240).
Audi Technical Information System (TIS): Docs A58240, SIB 2020-08-01, SIB 2022-05-02
VCA Type Approval Database (VCA/EMS/9877)
ISO 9249:2021 Road vehicles — Spark-ignition engines — Vocabulary
The Audi DEUB was used across Audi's MLB Evo platform with longitudinal mounting and shared architecture with Porsche and Volkswagen Group brands. This engine received platform-specific adaptations-revised cooling routing in the Q5 and enhanced NVH isolation in the A6-and from 2022 the facelifted A4 B9.5 adopted updated MHEV control logic with improved coasting functionality, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Audi TIS A58240). The 8th VIN digit indicates engine type ('D' for DEUB in A4/A5/Q5). Pre-2022 models have a silver valve cover; post-2022 units use black. Critical differentiation from EA888 evo3: DEUB features BSG unit and revised intake manifold, while earlier versions lack MHEV components. Service parts require model-year verification—fuel injectors for engines before 2022 are not interchangeable with later versions (Audi SIB 2022-05-02).
The DEUB's primary reliability risk is high-pressure fuel injector coking on early-production units, with elevated incidence in high-mileage vehicles operating in urban environments. Internal Audi field reports from 2023 indicated over 7% of pre-2022 engines required injector cleaning before 140,000 km, while VCA MOT data shows GPF-related failures are common in short-trip usage. Extended idling and poor fuel quality increase stress on injection components, making adherence to service schedules and use of quality petrol critical.
Analysis derived from Audi technical bulletins (2020-2023) and UK DVSA failure statistics (2021-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI DEUB.
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