The Audi CSUB is a 1,395 cc, inline — four turbocharged petrol engine produced between 2010 and 2015. It forms part of the Volkswagen Group’s EA211 engine family, designed for compact and subcompact applications. Featuring multi — point fuel injection (MPI), DOHC valvetrain, and aluminium construction, it delivers 81 kW (110 PS) with 180 Nm of torque. Its lightweight design supports improved fuel efficiency and reduced emissions across entry — level Audi models.
Fitted…
Production years 2010–2015 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Audi CSUB is a 1,395 cc inline-four turbocharged petrol engine engineered for compact models (2010–2015). It combines MPI fuel delivery with a belt-driven valvetrain to deliver responsive low-end performance. Designed to meet Euro 5 standards, it balances fuel economy with urban drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,395 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.5 mm × 79.5 mm | |
Power output | 81 kW (110 PS) @ 5,000 rpm | |
Torque | 180 Nm @ 1,500–3,500 rpm | |
Fuel system | Multi-point fuel injection (MPI) | |
Emissions standard | Euro 5 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single turbocharger (BorgWarner) | |
Timing system | Timing belt (interval: 120,000 km or 5 years) | |
Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
Dry weight | 97 kg |
The Audi CSUB was used across Audi's 8X/8V platforms with transverse mounting and shared within the Volkswagen Group for longitudinal applications. This engine received platform-specific adaptations-shorter intake manifolds in the A1 and revised cooling routing in the A3-and from 2013 the facelifted A3 models adopted the updated tensioner design, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CSUB's primary reliability risk is timing belt failure on neglected units, with elevated incidence in mixed urban use. Internal Audi quality reports from 2014 indicated a notable share of pre-2013 engines requiring belt replacement before 100,000 km, while UK DVSA records link a significant portion of emissions-related MOT failures to lambda sensor degradation in city-driven vehicles. Short-trip cycles and delayed maintenance increase tensioner and belt stress, making interval adherence critical.
Analysis derived from Audi technical bulletins (2012-2016) and UK DVSA failure statistics (2015-2023). 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 CSUB delivers responsive performance and good efficiency, but early models (2010-2012) had reliability concerns, especially timing belt failures. Later revisions (post-2013) improved tensioner durability, so well-maintained examples can be quite robust. Regular servicing and using high-quality oil (5W-30 VW 502 00) greatly aid longevity.
The biggest issues are timing belt wear (leading to squealing or breakage), turbo actuator failures, and intake carbon buildup affecting throttle response. Other complaints include oil leaks from the valve cover gasket and occasional lambda sensor faults. These are well-documented in Audi service bulletins.
This 1.4L petrol was used in the Audi A1 (8X) and early A3 (8V) models, primarily in 1.4 TFSI trim. It was also shared across the Volkswagen Group in SEAT Ibiza (1.4 TSI) and Škoda Fabia (1.4 TSI) from 2011-2015. In all cases, the engine met Euro 5 emissions standards.
Yes. The CSUB responds well to ECU remapping, with stage 1 tunes typically gaining +20-30 kW. The stock turbo and internals support moderate increases, but gains beyond 140 PS require supporting mods like intercooler and exhaust. Tuning should preserve factory lambda and knock control strategies.
Good for a turbo petrol. In an A1 1.4 TFSI (2012), typical consumption is ~7.2 L/100km (city) and ~4.8 L/100km (highway), or about 48 mpg UK combined. Real-world figures vary, but expect 40-50 mpg (UK) on mixed roads for a healthy CSUB engine.
Yes. The EA211 series (like most modern Audis) is an interference engine. This means if the timing belt breaks, pistons can strike open valves, causing catastrophic engine damage. Belt maintenance is critical—any sign of wear should be addressed immediately.
Audi specifies a 5W-30 synthetic oil meeting VW 502 00 (petrol) or 505 00 (multi-vehicle) specification. Change oil every 15,000 km or 2 years to ensure proper lubrication and prevent sludge buildup, especially in urban driving conditions.
Comprehensive technical documentation and regulatory references
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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)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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