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Toyota 4Runner Tail Light Bulbs Replacement Guide
How to change a burnt out rear turn signal or reverse light bulb in a 5th generation 2010 to 2016 Toyota 4Runner.

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2015 4Runner Tail Light
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Open Tailgate Door

This automotive maintenance tutorial was specifically written to assist owners of the fifth generation (2010, 2011, 2012, 2013, 2014, 2015 & 2016) Toyota 4Runner SUV in changing a burnt out rear turn signal or reverse light bulb in the tail light assemblies.

Owners of other Toyota, Lexus or Scion vehicles such as the Yaris, Corolla, Matrix, Prius, Camry, RAV4, Sienna, Tacoma, Tundra, FJ Cruiser, Venza, Highlander, Avalon, Sequoia, Land Cruiser, IS 250, ES 350, GS 350, tC, xB, xD, iQ and FR-S may also find these DIY instructions to be helpful.

The replacement light bulb part numbers are as follows: Rear Turn Signal # 7440A (or WY21W) and Reverse # 921.

The only tool needed to replace the tail light bulbs is a flathead screwdriver used to pry out the plastic access panel.

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Insert Flathead Screwdriver
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Pry Out Access Panel
The first two steps are to open the tailgate door and then move to the side of the SUV with the burnt out tail light bulb.

Locate the rectangular shaped access cover at the rear corner of the cargo area.

Insert either a flathead screwdriver or a plastic automotive panel pry bar tool in between the rear edge of the access cover and the cargo area panel.

Gently pry out the access cover and set it aside in a safe place.

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Access Cover Removed
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Back of Tail Light Housing
The rear turn signal light bulb socket is located near the top of the housing.

The reverse bulb socket is located closer to the bottom of the housing.

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Rear Turn Signal - Top
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1/4 Turn Counterclockwise

Rotate the base of the rear turn signal bulb socket 1/4 turn counterclockwise before removing it from the housing.

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Turn Signal Bulb Socket
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Pull Out Old WY21W
Pull the old light bulb straight out of the socket.



 

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Push In New 7440A
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Empty Bulb Housing
Push a new number 7440A (or WY21W) bulb straight in to the socket.
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1/4 Turn Clockwise - Lock
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Reverse At Bottom
Re-insert the turn signal bulb socket in to the housing and rotate it 1/4 turn clockwise to secure it in place.
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1/4 Turn Counterclockwise
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Pull Out Old # 921 Bulb
Rotate the grey plastic reverse bulb socket 1/4 turn counterclockwise and remove it from the housing.

Pull the old light bulb straight out of the socket.

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Push In New # 921 Bulb
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1/4 Turn Clockwise - Lock
Push a new number 921 light bulb straight in to the socket.

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

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Re-Insert Plastic Tabs
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Pop In Access Panel
Line up the plastic access panel and gently snap it back in to place.

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

For more, check out my other 2010-2016 Toyota 4Runner DIY Repair & Maintenance Guides.
 

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