The Audi AUK is a 1,984 cc, inline-four petrol engine produced between 2015 and 2021. It belongs to the Volkswagen Group's EA888 engine family, featuring turbocharged direct injection (TSI), double overhead camshafts (DOHC), and variable valve timing. In standard tune, it produces 140 kW (190 PS) at 3,800–6,000 rpm and 320 Nm of torque between 1,500–3,750 rpm, delivering strong low-end response and highway refinement.
Fitted primarily to the Audi A4 (B9), A5 (F5), and A6 (C7) models, the AUK engine was engineered for balanced performance and efficiency across mid-size platforms. Its design emphasizes responsive turbocharged delivery and smooth cruising, achieving Euro 6 emissions compliance through a three-way catalytic converter, lambda control, and exhaust gas recirculation (EGR). Start-stop technology and regenerative braking were integrated to enhance fuel economy.
One documented concern involves premature wear of the timing chain tensioner, particularly under extended oil change intervals. This issue, referenced in Audi Service Information Bulletin 2015-16-04, is linked to inadequate lubrication flow during cold starts. From 2017 onward, Audi implemented an updated tensioner design and revised oil service intervals to mitigate risk.
Production years 2015–2016 meet Euro 5 standards; 2017–2021 models comply with Euro 6 depending on market (VCA UK Type Approval #VCA/EMS/5683).
The Audi AUK is a 1,984 cc inline-four petrol engine engineered for mid-size applications (2015–2021). It combines turbocharged stratified injection (TSI) with variable valve timing to deliver responsive low-end torque and efficient cruising. Designed to meet Euro 6 standards, it balances performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 82.5 mm × 92.8 mm | |
| Power output | 140 kW (190 PS) @ 3,800–6,000 rpm | |
| Torque | 320 Nm @ 1,500–3,750 rpm | |
| Fuel system | Gasoline direct injection (TSI) | |
| Emissions standard | Euro 5 (pre-2017); Euro 6 (2017–2021) | |
| Compression ratio | 9.6:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single-scroll turbocharger with intercooler | |
| Timing system | Chain-driven (front-mounted; tensioner wear concern) | |
| Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
| Dry weight | 128 kg |
The turbocharged TSI design provides strong low-RPM torque ideal for urban and highway driving but requires strict adherence to 15,000 km oil service intervals to prevent timing chain tensioner wear. Use of VW 502 00 (5W-30) specification oil is critical due to its thermal stability and protection of the front-mounted chain system. Extended idling or short trips increase carbon buildup on intake valves, necessitating periodic walnut blasting. Fuel quality must meet EN 228 standards to prevent injector coking. Post-2017 models feature revised tensioner geometry; pre-2017 units should follow Audi SIB 2015-16-04 for inspection and update. EGR and emissions systems require regular cleaning to maintain catalytic efficiency and prevent DPF-related faults.
Oil Specs: Requires VW 502 00 / 505 00 (5W-30) specification (Audi SIB 2015-16-04). Supersedes ACEA A1/B1 standards.
Emissions: Euro 5 certification applies to pre-2017 models only (VCA Type Approval #VCA/EMS/5683). Euro 6 compliance confirmed for 2017–2021 models in applicable markets.
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel grades meeting EN 228 (Audi TIS Doc. A13910).
Audi Technical Information System (TIS): Docs A13575, A13897, SIB 2015-16-04
VCA Type Approval Database (VCA/EMS/5683)
SAE International: J1349 Engine Power Certification Standards
The Audi AUK was used across Audi's B9/F5/C7 platforms with longitudinal mounting and shared architecture within the Volkswagen Group MLB family. This engine received platform-specific adaptations-revised cooling routing in the A6 and dual-mass flywheel tuning in the A5-and from 2017 the facelifted A4 Avant adopted the AUK with updated emissions calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front timing cover near the alternator bracket (Audi TIS A13610). The 8th VIN digit indicates engine family ('CA' for EA888 series). Pre-2017 models have silver valve covers with ribbed plastic timing covers; post-2017 units use black valve covers. Critical differentiation from 1.8 TFSI: AUK features a larger turbocharger and different intake manifold routing. Service parts require production date verification - timing kits for engines before 06/2017 are incompatible with later units due to tensioner redesign (Audi SIB 2015-16-04).
The AUK's primary reliability risk is timing chain tensioner wear on early builds, with elevated incidence in short-trip urban use. Internal Audi quality reports from 2018 noted a significant share of pre-2017 engines requiring tensioner replacement before 100,000 km, while UK DVSA records link a portion of emissions-related MOT failures to lambda sensor degradation in city-driven vehicles. Cold-start cycles and extended oil intervals increase tensioner stress, making oil quality and service adherence critical.
Analysis derived from Audi technical bulletins (2015-2019) and UK DVSA failure statistics (2017-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI AUK.
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Regulation (EC) No 715/2007
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