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 engine was engineered for compact platform efficiency and agile performance. Emissions compliance was achieved through a close-coupled three-way catalytic converter and lambda control, meeting Euro 5 standards across all production years. The engine's compact design supports transverse mounting on the PQ25 and MQB platforms.
One documented service concern is premature turbocharger bearing wear, particularly in vehicles with extended oil change intervals or frequent short-trip driving. This issue, referenced in Audi Service Information Bulletin 20 12 14, stems from oil coking in the turbocharger center housing under thermal stress. From 2013, Audi introduced revised oil cooling pathways and updated ECU mapping to reduce sustained high-load operation during warm-up phases.
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 low-inertia turbo provides strong low-RPM pull ideal for city driving but requires strict adherence to 15,000 km oil change intervals to prevent turbo bearing coking and timing chain wear. Audi Longlife 01 (5W-30) oil is critical due to its thermal stability protecting the turbocharger center housing. Extended idling or frequent short trips increase thermal stress on the turbo, accelerating oil degradation. From 2013, revised ECU mapping reduced sustained high-load operation during warm-up, improving turbo longevity. Pre-2013 models benefit from the updated oil cooling circuit per Audi SIB 20 12 14. Lambda sensor accuracy is essential for catalytic efficiency; faulty sensors trigger emissions-related DTCs.
Oil Specs: Requires Audi Longlife 01 (5W-30) specification (Audi SIB 20 12 14). Supersedes ACEA A1/B1 requirements.
Emissions: Euro 5 certification applies to all CASB production years (2010–2016) (VCA Type Approval #VCA/EMS/5680).
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel qualities meeting EN 228 (Audi TIS Doc. A32607).
Audi Technical Information System (TIS): Docs A32052, A32117, A32303, SIB 20 12 14
VCA Type Approval Database (VCA/EMS/5680)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block near the exhaust manifold (Audi TIS A32802). The 7th digit of the VIN indicates engine family ('C' for EA211 series). Pre-2013 models feature silver valve covers with black plastic cam covers; post-2013 units use black valve covers. Critical differentiation from non-turbo variants: CASB has a turbocharger mounted to the exhaust manifold and intercooler piping. Service parts require production date verification—turbochargers before 06/2013 are not interchangeable with post-facelift designs (Audi SIB 20 12 14).
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.
Find answers to most commonly asked questions about AUDI CASB.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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