remove tail light and reach through
How to change third brake light in 2009 Hyundai sonata
BMW servise
Sounds like it may have been replaced at one point with an inferior piece.
On my 1988 Conv the third brake light comes out through the license plate opening.The service manual suggests removing both the gas filler door and rubber boot along with the license.
the screws come off and you replace it
You can't. The C5 third brake light is an LED unit. If the unit has went out the entire unit needs to be replaced. There are two bolts that hold the unit in that are accessed by removing the rear plate holder.
Remove the two screws holding the third brake light lens on then remove the lens, it may be stuck but it will pop off. Replace the two bulbs in there by pulling them straight out.
The third brake light on a 2007 Toyota Avalon is replaced by first removing the rear, retaining screws. The wiring harness can then be disconnect and the light bulb removed.
the third brake light is direct from brake light switch no fuse
Begin by removing the wiring harness from your third brake light. Remove the third brake light retaining screws. Reverse the process to install your new third brake light.
Its a whole led unit replace whole deal not bulb
Take out the two screws and replace one or both of the lamps.