An oil pressure switch is used as an actuator that activates the oil warning light when the oil pressure falls below the preset critical level to warn the driver about the low pressure of engine oil and prevent damage to the engine. The oil pressure switch can commonly be found on the cylinder block of the engine, in the oil filter housing or in some engine types at the engine head. The oil pressure switch is operated by a movable diaphragm with fitted hairspring that stays in the position depending on the pressure applied to i. At eWorldTrade, we have a selection of oil pressure switch and other automotive parts so if you need any replacements, you know you have us. eWorldTrade is a B2B portal that aims at providing you with the best quality of products and services in the market. Our manufacturers have some of the lowest wholesale rates available in the market.