The Audi DEJA is a 1,984 cc, inline — four turbocharged petrol engine produced between 2020 and 2025. Part of the Volkswagen Group's EA888 evo4 engine family, it was engineered to meet stringent Euro 6d emissions standards. Featuring direct fuel injection (TSI), variable valve timing (AVS), and a twin — scroll turbocharger, it delivers 140 kW (190 PS) and 320 Nm of torque, with improved combustion efficiency and reduced particulate emissions.
Fitted to models including t…
All production years (2020–2025) comply with Euro 6d standards depending on market .
The Audi DEJA is a 1,984 cc inline-four turbocharged petrol engine engineered for compact and mid-size models (2020–2025). It combines TSI direct injection with a twin-scroll turbocharger to deliver responsive low-RPM torque and efficient highway cruising. Designed to meet Euro 6d emissions standards, it balances real-world performance with stringent environmental 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 @ 1,500–4,000 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 11.0:1 | |
Cooling system | Dual-circuit water-cooled (low-temp/high-temp) | |
Turbocharger | Single twin-scroll turbo (BorgWarner) | |
Timing system | Chain-driven (long-life, non-serviceable) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 138 kg |
The Audi DEJA was used across Audi's B9/F5/FY platforms with longitudinal mounting in quattro applications and transverse in front-wheel-drive variants. This engine received platform-specific adaptations—reinforced mounts in the Q5 FY and revised EGR routing in the A4 B9—and from 2022 the updated A5 F5.5 facelift integrated enhanced GPF control logic, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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The DEJA's primary reliability risk is fuel injector coking under urban driving conditions, with elevated incidence in city-operated vehicles. Internal Audi quality reports from 2022 indicated a significant number of pre-2022 units required injector cleaning or replacement before 100,000 km, while VCA MOT records show increased particulate-related failures linked to injector degradation. Frequent short trips and low-load operation increase carbon buildup, making fuel quality and regular highway use critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The DEJA is generally robust when properly maintained, especially post-2022 models with updated injector design. Key risks include injector coking in urban environments and GPF clogging from short trips. Regular highway driving, use of EN 228 petrol, and adherence to oil change intervals (15,000 km) with Audi Longlife-04 oil are essential for long-term durability.
Key issues include fuel injector coking due to urban driving, GPF clogging from short trips, turbo actuator sticking, and EGR cooler leakage. These are documented in Audi service bulletins, particularly SIB 2021-06-08 for injector failures. Proper maintenance and driving habits significantly reduce failure risks.
The DEJA was used in the Audi A4 (B9, 40 TFSI), A5 (F5, 40 TFSI), Q5 (FY, 40 TFSI), and A6 (C8, 40 TFSI) from 2020 to 2025. It replaced earlier EA888 evo3 variants to meet Euro 6d standards. All applications feature either front-wheel drive or quattro all-wheel drive depending on model.
Aftermarket ECU tuning is common on the DEJA platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In real-world conditions, the DEJA achieves approximately 7.8 L/100km (city), 5.9 L/100km (highway), and 6.7 L/100km combined (~42 mpg UK). The A4 40 TFSI and Q5 40 TFSI are particularly efficient for petrol engines. Economy depends on driving style, with consistent highway use yielding best results.
Yes, the DEJA is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can occur, resulting in severe internal damage. Although the chain is designed for the engine's lifetime, any unusual noise from the timing cover should be investigated immediately to prevent catastrophic failure.
Audi specifies SAE 5W-30 oil meeting Longlife-04 standards. This low-ash formulation is critical for protecting the turbocharger, EGR system, and GPF. Oil changes should be performed every 15,000 km or annually, using only VW 502 00-compliant oils to ensure compatibility with emissions components.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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