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Honda Civic Third Brake Light Bulb Replacement Guide
How to change a burnt out high mount 3rd brake light bulb in a 10th generation 2016, 2017, 2018 & 2019 Honda Civic.

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2016 Civic 3rd Brake Light
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Open Trunk Lid
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Third Brake Bulb Socket
This automotive maintenance tutorial was specifically written to assist owners of the tenth generation 2016, 2017, 2018 and 2019 Honda Civic in changing a burnt out high mount third brake light bulb located in the housing attached to the rear deck above the trunk lid against the back windshield window.

Owners of other Honda or Acura vehicles such as the Accord, Insight, Clarity, Fit, HR-V, CR-V, Pilot, Passport, Odyssey, Ridgeline, ILX, MDX, RDX, NSX, RLX and TLX may also find these DIY instructions to be helpful.

The compatible replacement wedge base light bulb is part number 7440 (also known as W21W).

If you would like to have a brighter 3rd brake light that will also last a lot longer before burning out, install a 7440 LED bulb.

No tools are needed to access and replace the bulb.

The first two steps are to open the trunk lid and locate the underside of the light housing in the ceiling of the trunk.

(The steps might be similar for the hatchback for coupe Civic models.)



 

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1/4 Turn Counterclockwise
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Remove Bulb Socket
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Pull Out Old Light Bulb
Grasp the base of the grey plastic bulb socket and twist it 1/4 turn in the counterclockwise direction before pulling it straight out of the housing.

Gently pull the old light bulb straight out of the socket.

If you have trouble removing a stuck or stubborn bulb, try gently wiggling it back and forth while pulling it out.

Avoid using excessive pressure on the bulb to prevent from having it break and cut your fingers.

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Empty Bulb Socket
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Empty Light Housing
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Push In New Light Bulb
Push the new 7440 bulb straight into the socket.

For a brighter light, install a compatible replacement 7440 LED bulb.

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1/4 Turn Clockwise - Lock
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Bulb Socket Secured
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Test New Light Bulb
Re-insert the bulb socket into the housing and rotate it 1/4 turn in the clockwise direction to secure it into place.

To test the new light bulb, have an assistant step on the brake pedal.

If you installed an LED bulb and it doesn't work, try removing it from the socket, rotate it 180 degrees and push it back into the socket.

Some LED bulbs are polarized and will only work when the "+" positive and "-" negative electrical contacts are in the correct orientation.

Be sure to write down the bulb change in your vehicle's service records.

Please check out all of my 2016-2019 Honda Civic DIY Repair & Maintenance Guides.
 

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