CAYC Diesel Injectors
Compatible with Audi A1, Audi A3, Seat Altea, and 15 more
- OEM Tested & Calibrated
- 12-Month Warranty
- Free UK Delivery
Select the correct injector for your CAYC engine below
Fits Audi A1, Audi A3, Seat Altea, Seat Ibiza and more
Top injectors for CAYC
Compatible Injectors for CAYC
- OEM Tested
- 12-Month Warranty
- Free UK Delivery
Common problems solved by these injectors
About the CAYC engine
The CAYC is a 1.6-litre TDI common rail diesel engine produced by the Volkswagen Group. Rated at 105 PS (77 kW) with 250 Nm of torque, the CAYC was one of the most widely fitted engines across the VW Group lineup from 2009 to 2015. It uses Siemens VDO piezo-electric common rail diesel injectors operating at fuel pressures up to 1600 bar. The CAYC was designed as a highly efficient engine for mi…
Vehicles Using CAYC Engine
| Vehicle | Engine | Years |
|---|---|---|
| Audi A1 injector | 1.6 TDI | 2010–2015 |
| Audi A3 injector | 1.6 TDI | 2009–2013 |
| Seat Altea injector | 1.6 TDI | 2009–2015 |
| Seat Ibiza injector | 1.6 TDI | 2009–2015 |
| Seat Leon injector | 1.6 TDI | 2010–2012 |
| Seat Toledo injector | 1.6 TDI | 2012–2015 |
| Skoda Fabia injector | 1.6 TDI | 2010–2014 |
| Skoda Octavia injector | 1.6 TDI | 2009–2013 |
Common CAYC Injector Problems
Rough idle and engine vibration
Worn injector nozzles cause uneven fuel spray, leading to rough idle at low RPM. Most noticeable when the engine is cold.
Excessive exhaust smoke
Black or blue-grey smoke on acceleration indicates poor fuel atomisation. This is often caused by carbon buildup on the injector nozzle tip.
Poor fuel economy
A worn or leaking injector delivers incorrect fuel quantities, reducing efficiency by 10–20% in severe cases.
Engine misfire under load
Intermittent misfires during acceleration suggest one or more injectors are failing to deliver the correct fuel pressure.
Difficult cold starting
Degraded injector nozzles struggle to atomise fuel at lower cranking pressures, causing extended crank times in cold weather.
Loss of power
Gradual power loss across the rev range, particularly above 2500 RPM, can indicate injector flow rate degradation.
Increased diesel knock
Louder than normal combustion noise, especially at idle, can indicate incorrect injection timing due to worn injector internals.
CAYC Technical Specifications
Displacement
1598 cc
Power
77 kW (105 PS)
Torque
250 Nm
Fuel System
Common Rail Direct Injection
The CAYC is a 1.6-litre TDI common rail diesel engine produced by the Volkswagen Group. Rated at 105 PS (77 kW) with 250 Nm of torque, the CAYC was one of the most widely fitted engines across the VW Group lineup from 2009 to 2015. It uses Siemens VDO piezo-electric common rail diesel injectors operating at fuel pressures up to 1600 bar. The CAYC was designed as a highly efficient engine for mid-range vehicles including the Volkswagen Golf, Passat, Polo, Audi A1, A3, Skoda Octavia, Fabia, and Seat Leon. Despite its reliability, the CAYC is known for injector-related issues after high mileage, particularly carbon buildup and nozzle wear. Replacement injectors should always be fitted with new copper sealing washers and torqued to the correct specification.
Engine Intelligence
VW 1.6 TDI
Fitment note: Always confirm the part number against the injector fitted to the vehicle before ordering.
Related CAYC Engine Guides
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