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Mazda Mazda6 Dome Light Bulbs Replacement Guide
How to change a burnt out overhead dome light bulb in a 3rd generation 2014 to 2018 Mazda Mazda 6 sedan.

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2016 Mazda6 Dome Lights
Insert Flathead Screwdriver
This automotive maintenance tutorial was specifically written to assist owners of the third generation (2014, 2015, 2016, 2017 and 2018) Mazda Mazda6 sedan in changing a burnt out overhead dome light bulb (also known as the rear passenger courtesy reading lights) or upgrading them both to brighter LED units.

Owners of other Mazda vehicles such as the Mazda2, Mazda3, Mazda5, CX-3, CX-5, CX-7, CX-9, and the MX-5 Miata may also find these DIY instructions to be helpful.

The compatible replacement festoon or miniature "fuse" type light bulb is part number DE3175 which is available from various manufacturers such as Sylvania, GE, Philips and JDM.

You can also use a brighter LED unit.

The only tool needed to access and replace the light bulbs is a small flathead screwdriver or a plastic pry bar tool.

Remove Front Edge
Two Tabs - Rear Edge

To prevent from scratching the plastic surfaces, you can either use a thin plastic pry bar tool or wrap the tip of your flathead screwdriver with a thin micro fiber cloth.

Insert the blade of the screwdriver in between the translucent plastic lens cover and the overhead housing near the front edge (closer to the front of the car).

Gently pry out the front edge of the lens cover and then remove the two plastic tabs on the rear edge.

Set the lens cover aside in a safe place.

Old Light Bulb Exposed
Remove Old Light Bulb
If the old light bulb was recently turned on, be careful since it might still be hot enough to burn your fingers.

Pull the old DE3175 light bulb straight out of the socket.

Empty Bulb Socket
Old Light Bulb Removed

(The OEM bulb was marked as part number KHA12V8W4 7E.)

Install New Light Bulb
New Light Bulb Installed
Push a new festoon DE3175 light bulb straight in to the socket.
Re-Insert Plastic Tabs
Gently Pop In Front Edge
Re-insert the two plastic tabs on the rear edge of the lens cover back in to the housing.

Gently snap in the front edge of the lens cover.

Lens Cover Replaced
Test New Dome Light Bulbs
To test the new dome light (A.K.A. rear passenger courtesy reading lights), press on the rear part of the lens cover to activate the "On/Off" switch.

For more, check out my other 2014-2018 Mazda Mazda6 DIY Repair & Maintenance Guides.

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