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Mazda Mazda6 Tail Light Bulbs Replacement Guide
How to change a burnt out rear turn signal, side marker or reverse light bulb in a 3rd generation 2014 to 2018 Mazda 6.

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2016 Mazda 6 Tail Lights
Open Trunk Lid
Remove Plastic Storage Tray
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 rear turn signal, side marker or reverse bulbs in the tail light housings.

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 light bulb part numbers are as follows: Rear Turn Signal # 7440A (also 7440NA or WY21W), Rear Side Marker # 2825 and Reverse # 7440 (or W21W).

The only tool needed to access and replace the tail light bulbs is a small flathead screwdriver or a pop rivet removal tool.

(The brake lights are LED bulbs that should last the life time of the vehicle.)

Plastic Pop Rivet
Pry Up Center of Fastener
Pop Rivet Removed
The first two steps are to open the trunk lid and then move to the side of the car with the burnt out tail light bulb.

If you need to replace a bulb in the passenger side housing, lift out the plastic storage tray.

Set the tray aside in a safe place.

Move to the top of the black plastic trim piece that covers the outer edge of the trunk.

Pry out the center of the pop rivet fastener before pulling out the base.

Bottom Pop Rivet
Pry Out Lower Fastener
Gently Pull Back Plastic
Then remove the pop rivet located at the bottom of the plastic trim piece.

Warning - If you live in a very cold climate, I recommend removing all of the fasteners on the plastic panel and lifting it out of the trunk to avoid having it crack or break. Plastic can become very brittle in colder weather.

If you live in a warm climate, very gently pull back the top of the plastic trim panel to access the last pop rivet that secures the carpet liner to the rear of the trunk.

Don't pull too hard on the plastic piece to avoid having it crack.

Pry up the center of the pop rivet before removing the base of it.

Remove Carpet Pop Rivet
Pull Back Carpet Liner
Bulb Sockets Exposed
Set the pop rivet aside with the other fasteners.

Gently pull back the grey carpeted trunk liner to reveal the two bulb sockets.

The larger grey socket contains the rear turn signal bulb. The smaller black plastic socket contains the rear side marker.

1/4 Turn Counterclockwise
Pull Out Old Light Bulb
Push In New 7440A Bulb
Rotate the grey plastic turn signal bulb socket 1/4 turn counterclockwise before pulling it straight out of the housing.

Pull the old light bulb straight out of the socket and push in a new amber colored number 7440A (also known as the 7440NA or WY21W).

1/4 Turn Clockwise - Lock
Rear Side Marker Socket
1/4 Turn Counterclockwise
Re-insert the turn signal bulb socket in to the housing and rotate it 1/4 turn clockwise to secure it in place.

Rotate the smaller black plastic side marker bulb socket 1/4 turn counterclockwise before pulling it straight out of the housing.

Pull Out Old Light Bulb
Push In New 2825 Bulb
1/4 Turn Clockwise - Lock

Pull the old light bulb straight out of the socket.

Push in a new miniature wedge base number 2825 bulb straight in to the socket.

Re-insert the socket in to the housing and rotate it 1/4 turn clockwise to secure it in place.

Replace Carpet Liner
Push In Carpet Pop Rivet
Replace Plastic Trim Piece
Push the carpet liner back in to place over the rear corner of the trunk.

Re-insert the pop rivet to hold the carpet in place and push in the center part to secure the fastener.

Push the plastic trim piece back in to place over the rear edge of the trunk opening.

Pop In Fastener
Replace Lower Pop Rivet
Replace Storage Tray
Replace the upper and lower pop rivet fasteners.

Lower the plastic storage tray back in to place.

Reverse Light Housing
Trunk Lid Carpet Liner
Pry Up Center of Fastener
The reverse light bulb is located in a separate housing attached to the trunk lid.

Open the trunk lid and locate the three black plastic pop rivets along the outer edge of the carpeted liner panel.

Remove Pop Rivet
Remove Lower Pop Rivet
Remove Top Pop Rivet
Pry out the smaller center part of each fastener before lifting out the base.

Set the three pop rivets aside in a safe place.

Pull Back Carpet Liner
Reverse Bulb Socket
1/4 Turn Counterclockwise
Gently pull back the carpet liner panel to access the reverse bulb socket.

Rotate the black plastic reverse bulb socket 1/4 turn counterclockwise and pull it straight out of the housing.

Pull Out Old Light Bulb
Push In New 7440 Bulb
1/4 Turn Clockwise - Lock
Pull the old light bulb straight out of the socket.

Push in a new number 7440 bulb in to the socket.

Re-insert the socket in to the housing and rotate it 1/4 turn clockwise to secure it in place.

Re-Insert Pop Rivets
Push In Center of Fastener
Test New Tail Light Bulbs
Push the trunk lid liner back in to place.

Re-insert the three pop rivet fasteners and push in their center pieces to secure them in place.

To test the new tail light bulbs, have an assistant step on the brake pedal, activate the hazard signals and place the transmission in reverse.

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

If you found this guide to be helpful, please consider making a small donation by clicking on the "Donate" button located to the right of this paragraph. Thank you!
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