What is the color code for wires on 02 sensor on2006 mazda3?

For the 2006 Mazda3, the color codes for the O2 sensor wires are typically as follows: the heater circuit has a black wire (ground) and a white wire (power), while the signal wire is usually a gray or light blue wire, and the ground wire is often black or brown. However, it's always best to consult a specific repair manual or wiring diagram for your vehicle to ensure accuracy, as variations may exist based on the engine type or trim.