If you remove the panels from the interior of the trunk you should find the bolts that hold the taillamp assembly to the body of the car. Simply remove the nuts and this releases the lamp assembly.
you must pull out the entire breather assembly, then you unscrew the housing. Next, flip the retaining clip and replace the radiator.
NICOclub.com has a nice description on how to remove your tail lamps. Nissanclub.com is another website with very useful information as well. Essentially with simple hand tools it is a 5 minute job to remove the tail light assembly from your 08 Altima.
fog light not working and radio light went out
http://www.paulstravelpictures.com/Nissan-Altima-Rear-Brake-Light-Bulb-Replacement-Guide/Nissan-Altima-Tail-Light-Bulb-Replacement-Guide-011.html here you can see every step to that question.. I just did it.. and works :) by Paulo Fernando!!
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Remove the tie wrap that holds the wires for the light. Behind them you will find a nut that holds the light in place (2 nuts in total).Once you remove them (size 8mm)you can take the whole light assembly out from outside. Then turn electrical connector remove bulb and replace
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