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), and Q5 (8R), the DFUA engine was designed for balanced drivability in urban and highway environments. It incorporates exhaust gas recirculation (EGR), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection to meet strict Euro 6 compliance, ensuring low NOx emissions and regulatory acceptance across Europe and the UK.
One documented reliability concern is high-pressure fuel pump (HPFP) wear under aggressive driving conditions, noted in Audi Technical Service Bulletin 2015-24-05. Premature wear was linked to fuel quality and extended service intervals in early 2014–2016 units. From 2017, Audi implemented revised HPFP components and updated fuel system calibration to improve durability.
All production years (2014–2020) comply with Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/9012).
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 | Audi Longlife 05 (SAE 5W-30) | |
| Dry weight | 167 kg |
The VGT turbo provides strong low-RPM torque ideal for daily driving but requires adherence to 15,000 km oil change intervals using Audi Longlife 05 (5W-30) to ensure longevity of the high-pressure fuel pump and turbocharger. Ultra-low sulfur diesel (ULSD, EN 590) is essential to prevent HPFP wear and injector coking. EGR and DPF systems require regular regeneration; prolonged short trips may lead to clogging and limp mode. Post-2017 models feature revised HPFP and updated ECU calibration, reducing failure incidence. SCR-equipped models require AdBlue top-ups and periodic NOx sensor diagnostics.
Oil Specs: Requires Audi Longlife 05 (5W-30) specification (Audi SIB 2015-24-05). Supersedes ACEA B4 and C3 standards.
Emissions: Euro 6 applies to all 2014–2020 models (VCA Type Approval #VCA/EMS/9012). Includes SCR compliance.
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel qualities due to closed-loop injection control (Audi TIS Doc. A32179).
Audi Technical Information System (TIS): Docs A32179, SIB 2015-24-05
VCA Type Approval Database (VCA/EMS/9012)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block near the timing cover (Audi TIS A32179). The 8th VIN digit indicates engine type ('F' for DFUA series). Pre-2017 models have a Bosch CP3 high-pressure fuel pump; post-2017 units use a revised CP3.3 with improved sealing. Critical differentiation from EA288: DFUA uses a single VGT turbo (Garrett GT1749V), while EA288 variants may feature twin-scroll or e-VGT. Service parts require production date verification — fuel pumps and ECU variants differ significantly between 2014–2016 and 2017+ builds (Audi SIB 2015-24-05).
The DFUA's primary reliability risk is high-pressure fuel pump (HPFP) wear in early builds, with elevated incidence in aggressive driving with frequent short trips. Internal Audi quality reports from 2016 indicated a significant number of pre-2017 units required HPFP replacement before 150,000 km, while UK DVSA MOT data links DPF clogging to stop-start driving in city environments. Poor fuel quality and extended service intervals increase pump and injector stress, making fuel filtration and oil change adherence critical.
Analysis derived from Audi technical bulletins (2014–2018) and UK DVSA failure statistics (2017–2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI DFUA.
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