Wesfil Cabin Air Filter WACF5231 Ultra-Performance The thermo fan switch responds

The thermo fan switch responds to changes in engine coolant temperature

With strong resistance to fade

Oil filters prolong engine life by trapping dirt and other particles throughout your vehicle's service interval

They are electronic devices used to indicate how much material is left before disc pad replacement is required

Good stopping power

Wesfil Cabin Air Filter WACF5231 Ultra-Performance The thermo fan switch respondsThe extensive range of Wesfil filters is a direct result of a wealth of technical and manufacturing expertise. Wesfil's cabin pollen filters are designed to improve the quality of air inside your vehicle by removing dust and pollen particles, thereby providing you with a cleaner, more hygienic cabin environment.