Wesfil Air Filter WA5408 Ultra-Rotor The engine oil pressure sender/sensor

The engine oil pressure sender/sensor is designed to measure the integrity of the engine lubrication system

Like all Protex rotors

Anti drain-back valve preventing oil draining back out of the filter through the inlet holes

A secondary function of the switch may be performed on vehicles with cruise control

Wesfil Air Filter WA5408 Ultra-Rotor The engine oil pressure sender/sensorThe extensive range of Wesfil air filters are a direct result of a wealth of technical and manufacturing expertise. Air filters play a huge role in maximizing engine efficiency and fuel economy. Continual research and development has led to a range of features designed to optimize vehicle performance.