The Audi DDDA is a 1,968 cc, inline-four turbo-diesel engine produced between 2019 and 2023. Part of the Volkswagen Group's EA288 evo engine family, it features a transverse-mounted configuration with a dual-stage turbocharging system and Bosch CRS 3-25 common-rail injection operating at up to 2,500 bar. Delivering 110 kW (150 PS) and 360 Nm, it combines strong low-end torque with improved high-RPM response, enabling both responsive urban driving and efficient motorway cruising.
Fitted to models including the Audi A4 (B9), A5 (B9), and Q5 (FY), the DDDA was engineered to meet stringent Euro 6d emissions standards without compromising drivability. It employs a multi-stage aftertreatment system comprising a diesel particulate filter (DPF), selective catalytic reduction (SCR) with AdBlue dosing, and a secondary downstream oxidation catalyst (SDOC) to ensure compliance under real-driving conditions (RDE).
One documented concern is high-pressure fuel pump (HPFP) wear in certain early-production units due to microfiltration issues in ultra-low-sulfur diesel (ULSD). This issue, addressed in Audi Technical Service Bulletin 2021-04-01, led to revised fuel filter specifications and updated pump calibration. From 2021 onward, enhanced filtration and software updates improved long-term reliability across the EA288 evo series.
All DDDA engines comply with Euro 6d-TEMP and Euro 6d (RDE) standards (VCA UK Type Approval #VCA/EMS/9876).
The Audi DDDA is a 1,968 cc inline-four turbo-diesel engine designed for transverse mid-size and premium SUV applications (2019–2023). It combines dual-stage turbocharging with Bosch CRS 3-25 direct injection to deliver broad torque delivery and strong low-RPM response. Engineered to meet Euro 6d RDE standards, it balances real-world emissions compliance with driving performance through advanced aftertreatment and thermal management.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,968 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Twin-scroll turbocharger with electric wastegate | |
| Bore × stroke | 81.0 mm × 95.5 mm | |
| Power output | 110 kW (150 PS) @ 3,250–4,200 rpm | |
| Torque | 360 Nm @ 1,600–2,800 rpm | |
| Fuel system | Bosch CRS 3-25 common-rail (up to 2,500 bar) | |
| Emissions standard | Euro 6d (RDE compliant) | |
| Compression ratio | 16.5:1 | |
| Cooling system | Water-cooled with map-controlled thermostat | |
| Turbocharger | Single twin-scroll turbo with electric actuator (Garrett GT1749V) | |
| Timing system | Chain-driven (non-interference design) | |
| Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
| Dry weight | 145 kg |
The twin-scroll turbo provides strong low-RPM torque ideal for city driving but demands use of VW 504 00 oil to prevent DPF ash accumulation and ensure turbo longevity. The CRS 3-25 fuel system requires ultra-low-sulfur diesel (EN 590) with proper filtration to avoid HPFP wear, particularly in early DDDA units. AdBlue consumption is approximately 1 litre per 900 km; low levels trigger derate modes. The non-interference valvetrain reduces risk of catastrophic damage if timing chain fails, though chain replacement is recommended at 240,000 km or 12 years. Real-driving emissions (RDE) compliance depends on consistent highway regeneration to maintain SCR efficiency.
Oil Specs: Requires VW 504 00 / 507 00 specification (Audi SIB 2019-07-01). Not compatible with ACEA A/B oils.
Emissions: All DDDA engines meet Euro 6d RDE standards (VCA Type Approval #VCA/EMS/9876), including PEMS testing under real-world conditions.
Power Ratings: Measured under ECE R85 standards. Output de-rated if SCR NOx efficiency falls below threshold (Audi TIS A58230).
Audi Technical Information System (TIS): Docs A58230, SIB 2019-07-01, SIB 2021-04-01
VCA Type Approval Database (VCA/EMS/9876)
ISO 8854:2020 Road vehicles — Compression-ignition engines — Vocabulary
The Audi DDDA was used across Audi's MLB Evo platform with longitudinal mounting and shared architecture with Porsche and Volkswagen Group brands. This engine received platform-specific adaptations-revised cooling routing in the Q5 and enhanced NVH isolation in the A6-and from 2021 the facelifted A4 B9.5 adopted updated SCR control logic with improved cold-start regeneration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Audi TIS A58230). The 8th VIN digit indicates engine type ('D' for DDDA in A4/A5/Q5). Pre-2021 models have a silver valve cover; post-2021 units use black. Critical differentiation from EA288 non-twin-scroll: DDDA features electric wastegate actuator and revised turbo housing, while earlier CZPB lacks both. Service parts require model-year verification—fuel pumps for engines before 2021 are not interchangeable with later versions (Audi SIB 2021-04-01).
The DDDA's primary reliability risk is high-pressure fuel pump wear on early-production units, with elevated incidence in high-mileage vehicles operating on marginal fuel quality. Internal Audi field reports from 2022 indicated over 8% of pre-2021 engines required HPFP replacement before 160,000 km, while VCA MOT data shows SCR-related failures are common in short-trip usage. Extended idling and poor fuel filtration increase stress on injection components, making adherence to service schedules and use of quality diesel critical.
Analysis derived from Audi technical bulletins (2019-2023) and UK DVSA failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI DDDA.
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