Adapter for coolant sensors M57Adapter is necessary for installation when using electric coolant fans with the BMW M57 engine. It has M14x1.5 threaded sleeves for the electric coolant fan thermal switch and M12x1.25 for the 1-pin temperature sensor for Nissan Patrol Y60 Y61. Recommended sensors: TS2601 coolant fan thermal switch FAE31580 1-pin temperature sensor for Patrol Y60 FAE31650 1-pin temperature sensor for Patrol Y61 Price for 1 piece (set does not include sensors)