2-wired mat (2 pin mat connector) was usually placed in models manufactured before 2005 (European versions) and before 2003 (US versions).
European cars equipped with a two-wired mat usually have a metal key (not electronic). Thanks to this, we do not have to check if the mat has 2 wires. Let’s just remember that this simplification works if no changes have been made to the car’s installation, no seats have been changed. To be 100% sure, that would be best if you could check under the passenger seat if the seat mat has 2 wires.
In American cars, it is not possible to recognize the type of mat basing on the type of the key – here you always should check the seat mat type by looking under the passenger seat.
The 2 pin mat connector is located on the back of the seat. It is most convenient to move the seat forward and lift the back of the seat as much as possible. You have to enter the car through the back door. Under the seat there is a black can. On one side, a blue plug with 3 wires is connected. On the other, there are 2 wires (blue, white) leading to the mat plug.