Land Rover Water Pump STC4378 for Defender 90, Discovery 1, Discovery 2, Range Rover P38, and Range Rover Classic New high-quality aftermarket replacement that is a great fit for your Rover. Comes with a new gasket to prevent future leaks and extend the lifespan of your pump. ReplacesOE parts STC4378 and ERR4077 Fits the Land Rover Defender 90 (1997), Discovery 1 (1994 - 1999), Discovery 2 (1999 -2004), Range Rover P38 4.0 (1995 - 2002),Range Rover P38 4.6 (1995 - 2002), and the Range Rover Classic (1995) model vehicles.