The majority of new cars that have the audible reminder for the seat belt consists of Two switches. One is located in the seat, the other is gernerally located in the seatbelt catch. Have a look under you seat, you should see a small wiring harness, find where it connects to on the seat and remove it. Make sure if you have an electronic seat, that you dont remove the wiring for the seat position, height, tilt heating etc.. This switch should be a normally Open (N0) switch, that is when you sit on the seat it closes, if you find you have removed the correct wiring and the beeping continues with out you sitting on the seat, you will need to short the two wires together. WARNING: As this is a safety requirement, and it is fitted to your vehicle, any modification to this could result in a defect sticker, or even prevent you getting your CTP in states where you need to take the car for CTP inspection