For the 2017 Mazda Mazda6, the low-beam headlights use H11 bulbs, while the high beams use 9005 bulbs. The 9005 bulb is also listed for the daytime running lights, so confirm the lighting function before ordering a replacement.
The fog lights are listed with H11 LED bulbs. Front turn signals, parking lights, and front side markers use 7444NA. At the rear, reverse lights use 7440 bulbs and rear turn signals use 7440A. Tail lights are listed as 2825R, while rear side markers and license plate lights use 2825 bulbs.
For the interior, the dome and map lights use DE3175, the trunk light uses 194, and courtesy lights use 2825. This fitment information does not identify separate bulb requirements for different headlight designs or equipment packages, so use the listed H11 low beam and 9005 high beam sizes for this model year and verify the original bulb when replacing a fog-light LED.