The Volkswagen CASC is a 1,395 cc, inline‑four turbocharged petrol engine produced between 2012 and 2015. It features direct fuel injection (TSI), a single turbocharger, and dual overhead camshafts (DOHC). This iteration delivered 110 kW (150 PS) and 250 Nm of torque, engineered for a balance of spirited performance and efficiency in compact applications.
Fitted primarily to the Mk7 Golf and related MQB-platform vehicles, the CASC was designed for responsive acceleration and refined daily driving. Emissions compliance was achieved through precise engine management and exhaust after-treatment, meeting Euro 5 standards across its production run.
One documented engineering update involved the water pump design, where early units used a plastic impeller prone to failure. This was addressed in later production via Service Technical Bulletin 2048912/1, which recommended inspection and replacement with a revised metal-impeller unit if leaks or noise were detected.
Production years 2012–2015 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/6789).
The Volkswagen CASC is a 1,395 cc inline‑four turbocharged petrol engineered for compact hatchbacks and sedans (2012-2015). It combines gasoline direct injection (TSI) with a single turbocharger to deliver strong mid-range torque and efficient cruising. Designed to meet Euro 5 standards, it balances everyday performance with fuel economy.
| 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) | |
| Torque | 250 Nm @ 1,500–3,500 rpm | |
| Fuel system | Direct Injection (TSI), Bosch MED17.5 ECU | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single turbocharger (IHI or Garrett) | |
| Timing system | Chain-driven | |
| Oil type | VW 502 00 / 504 00 (SAE 5W‑30 or 5W‑40) | |
| Dry weight | Approx. 122 kg |
The turbocharged TSI design provides strong, linear power delivery but requires strict adherence to oil change intervals (every 15,000 km or annually) using VW 502/504 specification oil to prevent turbo and chain wear. The timing chain is generally robust but relies on clean oil; neglect can lead to tensioner rattle. High-pressure fuel system components demand high-quality fuel. Vehicles should have the water pump inspected per STB 2048912/1 if coolant leaks or whining noises are present. The chain-driven valvetrain eliminates belt replacement costs.
Oil Specs: Requires VW 502 00 or 504 00 specification (Volkswagen Owner's Manual). ACEA A3/B4 is the minimum acceptable standard.
Emissions: Euro 5 certification applies to all CASC engines (2012-2015) (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under DIN 70020 standards. Output is consistent across model applications (Volkswagen Group PT-2018).
Volkswagen Self-Study Programme (SSP): 524
Volkswagen Group Technical Publications (PT-2018)
VCA Type Approval Database (VCA/EMS/6789)
The Volkswagen CASC was used across Volkswagen's A7 (MQB) platform with transverse mounting. This engine received platform-specific ECU mappings for the Golf and Audi A3, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, below the exhaust manifold (Volkswagen SSP 524). The 8th VIN digit often corresponds to the engine code. Visually, the CASC features a plastic intake manifold with 'TSI' branding and a single turbocharger. Critical differentiation from similar engines (e.g., CAVE, CZDA): The CASC has a specific power output (150 PS) and unique ECU software map. Always verify the engine code stamp for part compatibility, as software and minor hardware revisions exist across model years.
The CASC's primary reliability risk is water pump failure on early builds, with elevated incidence in high-mileage vehicles. Volkswagen internal service data indicated a notable number of replacements were performed under warranty, while owner reports frequently cite coolant leaks as a maintenance concern. High engine temperatures and infrequent coolant checks can exacerbate wear, making regular monitoring critical.
Analysis derived from Volkswagen technical bulletins (2012-2016) and owner-reported data aggregated from manufacturer service networks (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN CASC.
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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
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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VCA Certification Portal
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