The Audi DEHA is a 1,984 cc, inline-four turbocharged petrol engine produced between 2017 and 2023. It belongs to the EA888 Gen 3B engine family, designed for transverse applications in compact and mid-size Audi models. Featuring direct fuel injection (FSI), variable valve timing (AVS), and a twin-scroll turbocharger, it delivers 140 kW (190 PS) and 320 Nm of torque, with enhanced thermal efficiency and reduced particulate emissions.
Fitted to models such as the A3 (8V), A4 (B9), A5 (F5), and Q3 (8U), the DEHA was engineered for responsive urban performance and efficient highway cruising. Emissions compliance was achieved through gasoline particulate filter (GPF), exhaust gas recirculation (EGR), and precise engine management, enabling full Euro 6c and later Euro 6d compliance across its production run.
One documented reliability concern is high-pressure fuel injector coking, highlighted in Audi Service Information Bulletin 2018-12-07. Carbon buildup restricts fuel flow and disrupts spray pattern, leading to misfires and elevated particulate emissions. From 2020, revised injector coatings and updated combustion calibration were introduced to improve deposit resistance.
Production years 2017–2019 meet Euro 6c standards; 2020–2023 models comply with Euro 6d-TEMP and Euro 6d (VCA UK Type Approval #VCA/EMS/8901).
The Audi DEHA is a 1,984 cc inline-four turbocharged petrol engineered for transverse-mounted applications in compact and mid-size models (2017–2023). It combines direct fuel injection with a twin-scroll turbocharger to deliver responsive low-end torque and improved fuel economy. Designed to meet Euro 6c and Euro 6d emissions standards, it balances performance with environmental compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| 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 @ 1,500–4,000 rpm | |
| Fuel system | Bosch HDEV5 direct injection (up to 350 bar) | |
| Emissions standard | Euro 6c (pre-2020), Euro 6d (2020–2023) | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled with dual-circuit thermostat | |
| Turbocharger | Single twin-scroll turbo (BorgWarner) | |
| Timing system | Roller chain (two-stage tensioner) | |
| Oil type | VW 508 00 / 509 00 (SAE 0W-20) | |
| Dry weight | 138 kg |
The twin-scroll turbo provides strong low-RPM response ideal for city driving but requires adherence to 15,000 km oil change intervals to prevent GPF and turbo degradation. VW 508 00/509 00 oil is critical due to its low-SAPS formulation protecting the GPF. Extended idling and short trips increase soot loading, necessitating regular highway runs for passive regeneration. The direct injection system is prone to coking; walnut blasting every 60,000 km helps maintain airflow. Post-2020 models feature improved injector coatings; pre-2020 units should be inspected for carbon buildup per Audi SIB 2018-12-07. GPF-equipped models require premium fuel (98 RON) for optimal regeneration and knock resistance.
Oil Specs: Requires VW 508 00 / 509 00 specification (Audi SIB 2018-12-07). Low-ash oil essential for GPF longevity.
Emissions: Euro 6c applies to 2017–2019 models; Euro 6d certification from 2020 onward (VCA Type Approval #VCA/EMS/8901).
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel qualities meeting EN 228 (Audi TIS Doc. A36025).
Audi Technical Information System (TIS): Docs A34724, A35105, SIB 2018-12-07
VCA Type Approval Database (VCA/EMS/8901)
SAE International: J1349 Engine Power Certification Standards
The Audi DEHA was used across Audi's 8V/B9/8U platforms with transverse mounting. This engine received platform-specific adaptations-shorter intake manifolds in the A3 and revised EGR routing in the Q3-and from 2020, full Euro 6d compliance with updated NOx sensors in A4 and A5 variants created interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front of the cylinder block near the timing cover (Audi TIS A34724). The 7th VIN digit indicates engine type ('D' for 2.0 TFSI EA888 series). Pre-2020 models have standard NOx sensors; post-2020 units feature updated sensors for Euro 6d compliance. Critical differentiation: DEHA has a Bosch ME17.3.6 ECU with 104-pin connector, while similar EA211 engines use different pinouts. Service parts require model-year verification—fuel injectors before 2020 are incompatible with Euro 6d variants (Audi SIB 2018-12-07).
The DEHA's primary reliability risk is direct fuel injector coking, with elevated incidence in urban driving with frequent cold starts. Internal Audi quality reports from 2019 noted a significant number of pre-2020 units requiring injector cleaning before 90,000 km, while UK DVSA data links GPF-related faults to a notable share of emissions test failures. Short trips and poor maintenance increase carbon buildup, making regular inspection and software updates critical.
Analysis derived from Audi technical bulletins (2017-2022) and UK DVSA failure statistics (2019-2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI DEHA.
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