The Volkswagen CBAC is a 1,390 cc, inline‑four turbocharged petrol engine produced between 2008 and 2015. It features gasoline direct injection (TSI), a single turbocharger, and dual overhead camshafts (DOHC). This engine was part of VW's effort to downsize while maintaining performance, delivering outputs around 90 kW (122 PS) and 200 Nm of torque.
Fitted primarily to the Mk5 and Mk6 Golf, as well as the Polo and Scirocco, the CBAC was engineered for responsive urban driving and efficient highway cruising. Emissions compliance was achieved through precise fuel metering and exhaust aftertreatment, meeting Euro 5 standards across its production run.
One documented concern is carbon buildup on the intake valves, a known characteristic of early direct-injection petrol engines without port injection. This issue, addressed in later TSI generations, can lead to rough idling and reduced performance if not managed. Volkswagen issued technical guidance for periodic cleaning procedures.
Production years 2008–2015 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Volkswagen CBAC is a 1,390 cc inline‑four turbocharged petrol engine engineered for compact hatchbacks and coupes (2008-2015). It combines gasoline direct injection (TSI) with a single turbocharger to deliver responsive power and good fuel efficiency. Designed to meet Euro 5 standards, it balances everyday drivability with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,390 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.5 mm × 75.6 mm | |
| Power output | 90 kW (122 PS) | |
| Torque | 200 Nm @ 1,500–3,500 rpm | |
| Fuel system | Gasoline direct injection (TSI) | |
| 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) | |
| Dry weight | Approx. 110 kg |
The turbocharged TSI design provides strong low-end torque for responsive city driving but requires adherence to 15,000 km oil change intervals using VW-spec 5W-30 to protect the turbo and timing chain. The lack of port injection makes periodic intake valve cleaning (every 60,000-80,000 km) critical to prevent carbon buildup, which can cause misfires and power loss. Using high-quality fuel helps mitigate deposit formation. The timing chain is generally robust but should be inspected if unusual noise is detected.
Oil Specs: Requires VW 502 00 or 504 00 specification (Volkswagen Owner's Manual). Longlife service intervals permitted with correct oil.
Emissions: Euro 5 certification applies to all CBAC engines (2008-2015) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under DIN 70020 standards. Output is consistent across applications (Volkswagen Group PT-2018).
Volkswagen Service Technical Documentation (SSP 455)
Volkswagen Electronic Parts Catalogue (ETKA)
VCA Type Approval Database (VCA/EMS/5678)
The Volkswagen CBAC was used across Volkswagen's Mk5/Mk6 platforms with transverse mounting. This engine received minor ECU and ancillary updates during its lifecycle, but core mechanical compatibility remains high across its applications. 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, near the thermostat housing (Volkswagen SSP 871). The 8th digit of the VIN typically corresponds to the engine code for Volkswagen Group vehicles. Visually, the CBAC can be identified by its plastic intake manifold and the "1.4 TSI" badge on the engine cover. Differentiate from the CAVE engine (160 PS) by power output and ECU part number; CAVE has a larger turbo and intercooler. Service parts are generally interchangeable within the CBAC family, but ECU software versions may vary by model year and vehicle.
The CBAC's primary reliability consideration is intake valve carbon buildup, a common trait in early direct-injection engines. While not typically causing catastrophic failure, it can lead to drivability issues and increased fuel consumption. Extended oil change intervals and frequent short trips can accelerate this process, making preventative maintenance critical.
Analysis derived from Volkswagen technical service bulletins (2008-2015) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN CBAC.
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DVLA: Engine Changes & MoT
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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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GOV.UK: Vehicle Approval
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