The Audi DFUA is a 1,968 cc, inline — four turbo — diesel engine produced between 2014 and 2020. It features common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). Delivering 110 kW (150 PS) and 340 Nm of torque, it was engineered for responsive mid — range performance and improved fuel efficiency over earlier TDI units, meeting Euro 6 emissions standards across all markets.
Fitted to models such as the A3 (8V), A4 (B8.5), an…
All production years (2014–2020) comply with Euro 6 emissions standards .
The Audi DFUA is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size models (2014–2020). It combines common-rail direct injection with a variable geometry turbocharger to deliver strong low-RPM response and efficient cruising. Designed to meet Euro 6 standards, it balances performance with environmental compliance.
| 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 | 110 kW (150 PS) @ 3,500–4,000 rpm | |
Torque | 340 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2-20 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 6 (all models) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
Timing system | Timing chain (double-row, front-mounted) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 167 kg |
The Audi DFUA was used across Audi's 8V/B8.5 platforms with transverse mounting and shared architecture with Volkswagen and Škoda applications. This engine received platform-specific adaptations—modified intake routing in the A3 and revised cooling in the Q5—and from 2017 the facelifted A4 B8.5 adopted updated thermal management systems, creating interchange limits. Partnerships allowed Volkswagen's 2.0 TDI CR and Škoda's 2.0 TDI to use identical core architecture. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The DFUA is generally robust when properly maintained, but early models (2014–2016) are prone to high-pressure fuel pump failures. Later revisions (2017+) with updated pumps and calibration show improved reliability. Regular oil changes with Audi Longlife 05 (5W-30) and use of quality diesel (EN 590) are essential for long-term durability.
The most common issues are high-pressure fuel pump wear, turbo actuator sticking, EGR and intake carbon buildup, and oil leaks from the valve cover and turbo lines. These are documented in Audi service bulletins and confirmed by UK MOT failure data, particularly in urban-driven vehicles.
The DFUA engine was used in the Audi A3 (8V), A4 (B8.5), and Q5 (8R) between 2014 and 2020. It was also shared with Volkswagen (Passat B8) and Škoda (Superb C7). All applications were 150 PS variants with Euro 6 compliance and SCR-based NOx reduction.
Aftermarket ECU tuning is common on the DFUA 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.
In real-world driving, the DFUA achieves approximately 5.3–6.1 L/100km (city) and 4.4–4.9 L/100km (highway). This equates to 45–54 mpg (UK) on mixed routes. Models with SCR and longer gearing (e.g., A4) may achieve slightly better figures. Driving style and DPF regeneration cycles significantly affect consumption.
Yes, the DFUA is an interference engine. If the timing chain fails or jumps, piston-to-valve contact is likely, resulting in severe internal damage. While the chain is generally durable, it should be inspected if noise or performance issues arise, especially on high-mileage engines.
Audi specifies 5W-30 synthetic oil meeting Audi Longlife 05 specification. This oil is critical for HPFP lubrication and turbo bearing protection. Oil changes should occur every 15,000 km or annually, whichever comes first, to maintain fuel system and engine longevity.
Comprehensive technical documentation and regulatory references
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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
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Type-approval guidance and documentation.
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