DENSO's First Time Fit relays are no different from the OE relays DENSO has manufactured for over 60 years - built to be quiet, efficient, and reliable. Designed and manufactured to outlast the closest competitor by a minimum of ten times more life cycles Product Features:Lifecycle lasts up to 10 times longer than the competitor'sFlux free micro arc welding versus competitors that solderHigh conductive material that does not corrodeShortest path for the electrical current improves efficiencyOffered by world's largest relay manufacturer