I finally got around to replacing the Forester’s taillight bulbs:
The clear bulbs don’t have the same thermal damage as the headlights I replaced a year ago, but the new bulbs should be much brighter.
Subaru calls them W21/5W and WY21W, respectively, but the rest of the world says 7443 and 7440NA (or 7440A).
For the record, the taillight assembly comes off (after removing the obvious pair of screws not shown here) by pulling straight back with grippy gloves:
Aligning the locating pins with those two latching sockets (why is one green?) requires a flashlight and a bit of dexterity, but easing the slot over the white post first helps a lot. Practice makes perfect: it’s easier on the other side of the car.
The Smell of Molten Projects in the Morning 