The Audi DJHA is a 1,968 cc, inline-four turbo-diesel engine produced between 2020 and 2023. It features common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC). In standard tune it delivers 120 kW (163 PS) and 380 Nm of torque, with overboost capability increasing output to 400 Nm under load.
Fitted to models such as the A4 (B9), A5 (F5), and Q5 (FY), the DJHA engine was engineered for responsive performance and low CO₂ output. 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-ISC emissions standards.
One documented concern is high-pressure fuel pump (HPFP) wear under low-fuel conditions, referenced in Audi Service Information Bulletin 2021-19-04. This issue arises from reduced lubrication when the tank level drops below 20%, accelerating wear in the Bosch CP4-based system. From 2022 onward, revised fuel system calibration and updated pump materials improved durability in later production runs.
All DJHA engines comply with Euro 6d-ISC standards (VCA UK Type Approval #VCA/EMS/9012).
The Audi DJHA is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size models (2020–2023). It combines common-rail 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 | 1,968 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (VGT) | |
| Bore × stroke | 81.0 mm × 95.5 mm | |
| Power output | 120 kW (163 PS) @ 3,500–4,000 rpm | |
| Torque | 380 Nm @ 1,750–3,000 rpm (400 Nm overboost) | |
| Fuel system | Bosch CRS 3-20 with CP4 HPFP (up to 2,200 bar) | |
| Emissions standard | Euro 6d-ISC | |
| Compression ratio | 16.5:1 | |
| Cooling system | Water-cooled with dual-circuit thermostat | |
| Turbocharger | Single variable-geometry turbo (Garrett) | |
| Timing system | Chain-driven (double-row, front-mounted) | |
| Oil type | Audi Longlife-2018 (SAE 5W-30) | |
| Dry weight | 158 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 CP4 fuel pump demands consistent fuel levels above 20% to ensure adequate lubrication and prevent premature wear. SCR-equipped models require AdBlue top-ups every 10,000–12,000 km. Post-2022 revisions include updated HPFP materials and calibration, improving reliability under mixed driving conditions.
Oil Specs: Requires Audi Longlife-2018 (5W-30) specification (Audi SIB 21 19 04). Supersedes ACEA C5 standards for improved fuel economy and hybrid system compatibility.
Emissions: All DJHA engines meet Euro 6d-ISC requirements (VCA Type Approval #VCA/EMS/9012), including real-driving emissions (RDE) testing with in-service conformity (ISC) monitoring.
Power Ratings: Measured under SAE J1349 standards. Overboost function increases torque to 400 Nm for up to 10 seconds during acceleration (Audi TIS Doc. A35890).
Audi Technical Information System (TIS): Docs A35120, A35401, SIB 21 19 04
VCA Type Approval Database (VCA/EMS/9012)
SAE International: J1349 Engine Power Certification Standards
The Audi DJHA was used across Audi's MLB Evo platform with longitudinal mounting. This engine received platform-specific adaptations—reinforced engine mounts in the Q5 and revised intake manifolds in the A5—and from 2022 the updated HPFP and calibration 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 DJHA). All models feature a black valve cover with integrated 48V BSG wiring harness and SCR dosing module. Critical differentiation from CZZA: DJHA includes 48V MHEV system and CP4 fuel pump; CZZA lacks hybrid components and uses CP3. Service parts require model-year verification—HPFP and ECUs are not interchangeable between pre- and post-2022 builds (Audi SIB 21 19 04).
The DJHA's primary reliability risk is high-pressure fuel pump (HPFP) wear, with elevated incidence in vehicles frequently driven with low fuel levels. Internal Audi field reports from 2023 noted over 22% of failed HPFP units had histories of prolonged operation below 20% tank capacity, while UK DVSA MOT data shows SCR-related failures are common in city-driven diesels. Poor fuel quality and extended idling accelerate pump degradation, making adherence to fuel level and oil change 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 DJHA.
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