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 outpu…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The DJHA is generally robust when maintained properly, but models frequently operated with low fuel levels are prone to HPFP failure. Later units (post-2022) show improved fuel system durability. Regular highway driving, timely oil changes with Audi Longlife-2018 oil, and maintaining fuel above 20% significantly extend service life beyond 200,000 km.
The most frequent issues are high-pressure fuel pump wear due to low fuel levels, DPF regeneration failure, turbo actuator sticking, and oil leaks from the valve cover. These are documented in Audi service bulletins and are largely preventable with proper maintenance. 48V MHEV and SCR-equipped models may also face electrical or AdBlue system faults.
The DJHA engine was used in the A4 (B9), A5 (F5), and Q5 (FY) from 2020 to 2023. It appears in 40 TDI variants. All units are equipped with 48V mild-hybrid technology for improved efficiency and throttle response, complying with Euro 6d-ISC emissions standards.
Yes, the DJHA responds well to ECU remapping. Stage 1 tunes typically increase output to 140–150 kW (190–204 PS) and 480 Nm torque. The engine's robust internals and VGT support moderate tuning, but supporting modifications like improved cooling and DPF monitoring are recommended for sustained performance. Overboost function enhances responsiveness in stock and tuned configurations.
In real-world conditions, the DJHA achieves 5.2–6.2 L/100km (45–54 mpg UK) on mixed driving. Highway efficiency can reach ~4.8 L/100km (~58 mpg UK). The 48V MHEV system improves stop-start efficiency and torque fill, reducing consumption in urban driving by up to 0.6 L/100km compared to non-hybrid equivalents.
Yes, the DJHA is an interference engine. If the timing chain fails or skips, piston-to-valve contact can occur, resulting in severe internal damage. The front-mounted chain is generally durable, but adherence to oil change intervals is critical to ensure proper lubrication and tensioner function.
Audi specifies SAE 5W-30 oil meeting Longlife-2018 (or newer) standards. This low-SAPS formulation is essential for protecting the turbocharger, EGR system, and 48V hybrid components. Oil changes should be performed every 15,000 km or annually, whichever comes first, to maintain engine longevity and hybrid system functionality.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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