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 motor…
All DDDA engines comply with Euro 6d-TEMP and Euro 6d (RDE) standards .
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 145 kg |
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.
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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 manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The DDDA is generally reliable when maintained properly, but pre-2021 models are prone to high-pressure fuel pump wear. Later units benefit from revised components and improved fuel filtration. Regular DPF regeneration, use of VW 504 00 oil, and periodic SCR system checks are essential for longevity. Well-maintained engines commonly exceed 250,000 km.
Primary issues include HPFP wear, SCR system faults, turbo actuator sticking, and DPF clogging due to urban driving. These are documented in Audi service bulletins and field reports. Fuel quality and driving pattern are critical factors in preventing premature failures, especially in early-production engines.
The DDDA engine was used in the Audi A4 (B9/B9.5, 2019–2023), A5 (B9/B9.5, 2019–2023), and Q5 (FY, 2019–2023). It was phased out in favour of newer GPF-equipped variants. All applications are diesel-only and feature SCR technology with AdBlue as standard.
Aftermarket ECU tuning is common on the DDDA 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.
Fuel consumption ranges from 5.1–6.0 L/100km (55–47 mpg UK) depending on model and driving style. In an A4 40 TDI, combined economy is approximately 5.4 L/100km (52 mpg UK). Real-world figures may vary, especially if DPF regeneration is frequent due to short trips.
No. The DDDA features a non-interference valvetrain design. If the timing chain fails, piston-to-valve contact is avoided, reducing risk of catastrophic engine damage. However, chain replacement is still recommended per schedule to prevent drivability issues and secondary damage.
The DDDA requires VW 504 00 or 507 00 specification oil (SAE 5W-30). This low-ash formulation is essential to prevent DPF clogging and ensure proper turbo and chain lubrication. Oil changes should be performed every 15,000 km or annually to maintain engine health.
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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