Fit for: 1990-1994 Nissan D21 1998-2004 Nissan Frontier 1995-1997 Nissan Pickup 2000-2004 Nissan Xterra A cooling fan clutch is a thermostatic engine cooling fan that can freewheel at low temperatures when cooling is not needed, allowing the engine to warm up faster, relieving unnecessary load on the engine. As temperatures increase, the clutch engages so that the fan is driven by engine power and moves air to cool the engine. .
