The Audi CASB is a 1,395 cc, inline — three turbocharged petrol engine produced between 2010 and 2016. It features TFSI (Turbo Fuel Stratified Injection), DOHC, and variable valve timing (VVT), delivering 81 kW (110 PS) at 5,000 rpm and 200 Nm of torque between 1,500–3,500 rpm. This configuration provides strong low — end responsiveness ideal for urban driving, with precise fuel metering enhancing efficiency.
Fitted to models including the 8X A1, 8V A3, and 8S TT, the CASB e…
Production years 2010–2016 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/5680).
The Audi CASB is a 1,395 cc inline-three turbo-petrol engine developed for Audi's compact platforms (2010–2016). It combines TFSI direct injection with a low-inertia turbocharger to deliver responsive low-RPM torque and efficient city driving. Designed to meet Euro 5 standards, it balances drivability with emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,395 cc | |
Fuel type | Petrol | |
Configuration | Inline-3, DOHC, 12-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.5 mm × 80.0 mm | |
Power output | 81 kW (110 PS) @ 5,000 rpm | |
Torque | 200 Nm @ 1,500–3,500 rpm | |
Fuel system | Bosch Motronic ME 7.8.8 with TFSI | |
Emissions standard | Euro 5 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single low-inertia turbo (IHI RHF4) | |
Timing system | Timing chain (single-row) | |
Oil type | Audi Longlife 01 (SAE 5W-30) | |
Dry weight | 97 kg |
The Audi CASB was used across Audi's 8X/8V platforms with transverse mounting and shared architecture within the Volkswagen Group. This engine received platform-specific adaptations-shorter accessory drives in the A1 and enhanced cooling in the TT-and from 2013 the facelifted A3 Mk3 adopted revised turbocharger cooling circuits, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
The CASB's primary reliability risk is turbocharger bearing wear, with elevated incidence in vehicles subjected to frequent short trips or extended oil change intervals. Internal Audi service reports from 2014 indicated a significant number of 8X A1 owners reporting loss of boost before 80,000 km, while UK DVSA MOT records show increased emissions-related failures linked to lambda sensor degradation in high-mileage units. Thermal stress from repeated cold starts and inadequate cool-down periods amplify turbo wear, making oil quality and operational habits critical.
Analysis derived from Audi technical bulletins (2010–2016) and UK DVSA failure statistics (2014–2022). 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 CASB is generally robust when maintained properly, though it is prone to turbocharger bearing wear if oil changes are delayed or short-trip driving is frequent. Early models (2010–2012) show higher rates of turbo failure. Later revisions improved cooling and ECU mapping. Regular oil changes with Audi Longlife 01 (5W-30), avoidance of extended idling, and proper cool-down after high-load use significantly improve long-term reliability.
The most documented issues are turbocharger bearing wear, ignition coil failures, timing chain tensioner wear, and valve cover oil leaks. These are covered in Audi service bulletins, particularly SIB 20 12 14. Turbo issues lead to power loss, while coil and tensioner faults can cause misfires and timing damage if not addressed promptly.
The CASB engine was used in the Audi A1 (8X, 2010–2015), A3 (8V, 2013–2016), and TT (8S, 2014–2016). It was part of Audi's 1.4 TFSI lineup and shared across the Volkswagen Group MQB platform, also appearing in select SEAT and Volkswagen variants.
Yes, the CASB responds well to ECU remapping, with stage 1 tunes typically adding 25–35 kW while retaining factory reliability. The stock turbo and internals handle increased boost within safe limits. More aggressive tuning requires upgraded intercoolers and fueling components. Tuning should be performed by specialists familiar with TFSI systems to avoid pre-ignition and knock.
In combined driving, the CASB achieves approximately 5.8 L/100km (49 mpg UK). Highway efficiency improves to ~5.2 L/100km (54 mpg UK), while city driving may reach 7.0 L/100km (40 mpg UK). Real-world consumption depends on driving style, but it is typical for 1.4L TFSI engines of this era.
Yes. The CASB is an interference engine, meaning piston-to-valve contact occurs if timing fails. A broken or jumped timing chain can result in bent valves and severe internal damage. Proper maintenance of the chain and tensioner is essential to avoid catastrophic failure.
Audi specifies SAE 5W-30 oil meeting Audi Longlife 01 standard. This synthetic oil ensures proper lubrication for the turbocharger bearings, timing chain, and high-load components. Oil changes should occur every 15,000 km or annually to maintain engine health and prevent premature wear.
Comprehensive technical documentation and regulatory references
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