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 inc…
All DAXB engines comply with Euro 6b standards .
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 107 kg |
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.
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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 manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The DAXB is generally reliable when maintained properly, but pre-2018 models are prone to timing belt tensioner wear. Later units benefit from revised components and improved thermal management. Regular GPF regeneration, use of VW 502 00 oil, and periodic intake cleaning are essential for longevity. Well-maintained engines commonly exceed 200,000 km.
Primary issues include timing belt tensioner degradation, GPF clogging due to urban driving, intake carbon buildup, and turbo wastegate sticking. These are documented in Audi service bulletins and field reports. Oil quality and driving pattern are critical factors in preventing premature failures.
The DAXB engine was used in the Audi A3 (8V, 2015–2021), A4 (B9/B9.5, 2015–2021), and Q3 (8U, 2015–2021). It was phased out in favour of newer EA211 evo variants with enhanced efficiency. All applications are petrol-only and feature GPF technology as standard.
Aftermarket ECU tuning is common on the DAXB 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 5.8–7.2 L/100km (49–39 mpg UK) depending on model and driving style. In an A3 35 TFSI, combined economy is approximately 6.2 L/100km (46 mpg UK). Real-world figures may vary, especially if GPF regeneration is frequent due to short trips.
Yes. The DAXB features an interference valvetrain design. If the timing belt fails, piston-to-valve contact will occur, resulting in severe internal engine damage. Adherence to the 180,000 km or 9-year replacement interval is critical to prevent catastrophic failure.
The DAXB requires VW 502 00 or 505 00 specification oil (SAE 5W-30). This low-SAPS formulation is essential to protect the turbocharger and GPF. 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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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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