Where is the fuel pump on a 2003 Volvo S40 1.9D?

The fuel pump on a 2003 Volvo S40 1.9D is located inside the fuel tank. To access it, you'll need to remove the rear seat and the access panel, or alternatively, drop the fuel tank from beneath the vehicle. It's advisable to take necessary precautions, such as disconnecting the battery and relieving fuel system pressure, before attempting to replace or service the fuel pump.