Where is the oil filter located on a 2004 Volvo S40 1.9?

On a 2004 Volvo S40 1.9, the oil filter is located on the engine block, towards the front of the vehicle, just above the oil pan. It is positioned near the driver's side, making it accessible from underneath the car. To change the oil filter, you'll typically need to raise the vehicle for better access. Always ensure the engine is cool and the vehicle is secure before attempting any maintenance.