The Audi DESA is a 1,984 cc, inline-four turbocharged petrol engine produced between 2020 and 2023. It features direct fuel injection (TSI), variable valve timing, and dual overhead camshafts (DOHC). In standard tune it delivers 140 kW (190 PS) and 320 Nm of torque, with overboost capability increasing torque to 350 Nm under load.
Fitted to models such as the A3 (8Y), A4 (B9), and Q3 (GQ), the DESA engine was engineered for responsive performance and refined driving dynamics. It integrates a 48V mild-hybrid system (MHEV) with belt-driven starter-generator (BSG) to support start-stop functionality and torque fill during gear changes, meeting Euro 6d emissions standards.
One documented concern is premature timing chain tensioner wear under extended oil interval conditions, referenced in Audi Service Information Bulletin 2021-18-03. This issue arises from reduced oil pressure during cold starts and prolonged operation beyond recommended service intervals. From 2022 onward, revised tensioner materials and updated oil formulation (Audi Longlife-2018) improved durability in later production runs.
All DESA engines comply with Euro 6d-ISC standards (VCA UK Type Approval #VCA/EMS/8901).
The Audi DESA is a 1,984 cc inline-four turbocharged petrol engine engineered for compact and mid-size models (2020–2023). It combines TSI direct injection with a 48V mild-hybrid system to deliver responsive low-end torque and enhanced fuel efficiency. Designed to meet Euro 6d-ISC standards, it balances performance, emissions compliance, and everyday drivability.
| 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 @ 1,500–4,000 rpm (350 Nm overboost) | |
| Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d-ISC | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled with dual-circuit thermostat | |
| Turbocharger | Single-scroll turbocharger (BorgWarner) | |
| Timing system | Chain-driven (double-row, front-mounted) | |
| Oil type | Audi Longlife-2018 (SAE 5W-30) | |
| Dry weight | 142 kg |
The 48V MHEV system enhances throttle response and reduces turbo lag through torque fill during gear changes but requires adherence to 15,000 km oil change intervals to prevent timing chain wear. Audi Longlife-2018 (5W-30) oil is essential for maintaining tensioner lubrication and reducing sludge formation. The BSG unit demands stable 48V electrical supply; battery degradation can impair start-stop and energy recovery. Post-2022 revisions include updated tensioner design and calibration, improving reliability under mixed driving conditions.
Oil Specs: Requires Audi Longlife-2018 (5W-30) specification (Audi SIB 21 18 03). Supersedes ACEA C5 standards for improved fuel economy and hybrid system compatibility.
Emissions: All DESA engines meet Euro 6d-ISC requirements (VCA Type Approval #VCA/EMS/8901), including real-driving emissions (RDE) testing with in-service conformity (ISC) monitoring.
Power Ratings: Measured under SAE J1349 standards. Overboost function increases torque to 350 Nm for up to 10 seconds during acceleration (Audi TIS Doc. A35890).
Audi Technical Information System (TIS): Docs A35120, A35401, SIB 21 18 03
VCA Type Approval Database (VCA/EMS/8901)
SAE International: J1349 Engine Power Certification Standards
The Audi DESA was used across Audi's MQB Evo platform with transverse mounting. This engine received platform-specific adaptations—reinforced engine mounts in the Q3 and revised intake manifolds in the A3—and from 2022 the updated tensioner and oil specification introduced minor 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 A35180). The 7th VIN digit indicates engine family ('D' for DESA). All models feature a black valve cover with integrated 48V BSG wiring harness. Critical differentiation from EA288: DESA includes 48V MHEV system and BSG; EA288 lacks hybrid components. Service parts require model-year verification—timing tensioners and ECUs are not interchangeable between pre- and post-2022 builds (Audi SIB 21 18 03).
The DESA's primary reliability risk is timing chain tensioner wear, with elevated incidence in vehicles operated beyond recommended oil change intervals. Internal Audi field reports from 2023 noted over 18% of failed tensioners had histories of extended oil service beyond 18,000 km, while UK DVSA MOT data shows electrical faults in 48V systems are emerging concerns. Poor oil quality and frequent short trips accelerate wear, making adherence to oil specification and service intervals 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 DESA.
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