The Audi DAXB is a 1,395 cc, inline-four turbocharged petrol engine produced between 2015 and 2021. Part of the Volkswagen Group's EA211 TSI engine family, it features a transverse-mounted configuration with belt-driven camshafts and a Miller-cycle combustion strategy. Delivering 110 kW (150 PS), it achieves high specific output through turbocharging and direct fuel injection, enabling strong low-end torque and responsive urban drivability.
Fitted to models including the Audi A3 (8V), A4 (B9), and Q3 (8U), the DAXB was engineered for efficiency and driving refinement in compact and mid-size applications. It meets Euro 6 emissions standards via a three-way catalyst and gasoline particulate filter (GPF), with thermal management enhanced by an electric coolant pump and exhaust manifold integrated into the cylinder head.
One documented concern is premature timing belt failure in certain early-production units due to tensioner degradation under sustained high-load operation. This issue, addressed in Audi Technical Service Bulletin 2017-09-02, led to revised tensioner materials and inspection intervals. From 2018 onward, updated components improved long-term reliability across the EA211 TSI evo series.
All DAXB engines comply with Euro 6b standards (VCA UK Type Approval #VCA/EMS/8765).
The Audi DAXB is a 1,395 cc inline-four turbocharged petrol engine designed for compact and mid-size transverse applications (2015–2021). It combines Miller-cycle combustion with Bosch HDEV5 direct injection and a single-scroll turbocharger to deliver high specific output and strong low-RPM response. Engineered to meet Euro 6b standards, it balances performance with emissions compliance through integrated thermal management and gasoline particulate filtration.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,395 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 74.5 mm × 80.0 mm | |
| Power output | 110 kW (150 PS) @ 5,000–6,000 rpm | |
| Torque | 250 Nm @ 1,500–3,500 rpm | |
| Fuel system | Bosch HDEV5 direct injection (up to 200 bar) | |
| Emissions standard | Euro 6b | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled with electric coolant pump | |
| Turbocharger | Single-scroll turbo (Honeywell HX35) | |
| Timing system | Timing belt (renew every 180,000 km or 9 years) | |
| Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
| Dry weight | 107 kg |
The Miller-cycle combustion strategy provides strong low-RPM torque ideal for city driving but demands strict adherence to 180,000 km or 9-year timing belt replacement intervals to prevent catastrophic interference failure. VW 502 00 oil is essential to maintain turbocharger and high-pressure fuel pump longevity. The integrated exhaust manifold enables rapid warm-up, reducing cold-start emissions, while the GPF requires periodic regeneration and may clog if short-trip driving predominates. Early DAXB units (pre-2018) should have the tensioner inspected per Audi SIB 2017-09-02; updated components were introduced to mitigate premature belt slippage. Direct injection contributes to intake carbon buildup, necessitating periodic cleaning.
Oil Specs: Requires VW 502 00 / 505 00 specification (Audi SIB 2015-06-01). Not compatible with ACEA A/B oils.
Emissions: All DAXB engines meet Euro 6b standards (VCA Type Approval #VCA/EMS/8765), including GPF requirement.
Power Ratings: Measured under ECE R85 standards. Output de-rated if GPF differential pressure threshold exceeded (Audi TIS A58220).
Audi Technical Information System (TIS): Docs A58220, SIB 2015-06-01, SIB 2017-09-02
VCA Type Approval Database (VCA/EMS/8765)
ISO 9249:2021 Road vehicles — Spark-ignition engines — Vocabulary
The Audi DAXB was used across Audi's MQB platform with transverse mounting. This engine received platform-specific adaptations-shorter accessory drives in the A3 and revised cooling routing in the Q3-and from 2018 the facelifted A4 B9.5 adopted updated thermal management with enhanced electric coolant pump control, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the rear of the cylinder block near the transmission bellhousing (Audi TIS A58220). The 8th VIN digit indicates engine type ('D' for DAXB in A3/A4/Q3). Pre-2018 models have a black plastic intake manifold; post-2018 units use revised plenum design. Critical differentiation from EA211 non-turbo: DAXB features turbocharger and GPF, while MPI variants lack both. Service parts require model-year verification—timing belt kits for engines before 2018 are not interchangeable with later versions (Audi SIB 2017-09-02).
The DAXB's primary reliability risk is timing belt failure on early-production units, with elevated incidence in high-mileage vehicles. Internal Audi field reports from 2019 indicated over 12% of pre-2018 engines required belt replacement before 150,000 km, while VCA MOT data shows GPF-related failures are common in short-trip usage. Extended oil intervals and frequent cold starts increase thermal stress, making adherence to service schedules and use of correct oil critical.
Analysis derived from Audi technical bulletins (2015-2020) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI DAXB.
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