See also:

Trailer Towing
The Mazda3 is not designed for towing. Never tow a trailer with your Mazda3. ...

Accessory Sockets
The ignition switch must be in the ACC or ON position. Only use genuine Mazda accessories or the equivalent requiring no greater than 120 W (DC 12 V, 10 A). The accessory socket is in the center ...

Specifications
Engine Electrical System *1 ex factory NOTE: When cleaning the iridium plugs, do not use a wire brush. The fine particulate coating on the iridium alloy and platinum tips could be damaged. ...