Modern designs are even flow-optimized and thus help to increase the efficiency of the engine. In addition to filtering and cooling the oil in petrol and diesel engines, they perform many other functions. These include optional oil mist separation, sensors for pressure and temperature control, regulation for oil pressure and crankcase pressure regulation or thermostat-controlled regulation of the oil flow to the heat exchanger.

Oil filter modules are usually located directly on the engine block. And there it is sometimes hot, sometimes cold and it vibrates all the time. Even if the housing is made of high-performance plastics and die-cast aluminum elements, aging affects the plastic components. For example, a defective or improperly fitted cover seal can lead to leaks and thus to oil loss. Conversely, the use of unsuitable tools when removing or installing the oil filter cover can irreversibly damage the module.