XC90 2.5T AWD L5-2.5L Turbo VIN 59 B5254T2 (2003)
The oil pressure sensor is located on the bottom edge of the engine, to the left of the front engine mounting.
Open the hood.
Disconnect the connector.
Unscrew the oil pressure sensor.
Oil pressure sensor, 5-and 6-cylinder
Tighten to 50 Nm.
In reverse order.