The OEM brake light switch grommet on your 240SX dries out, cracks, and fails — usually at the worst time. When it goes, your brake lights stay on until your battery dies, or don't come on at all.
This is the fix. Two minutes, no tools, done.
Fits:
Nissan 240SX S13 (1989–1994)
Nissan 240SX S14 (1995–1998)
Why it matters:
Dead grommet = brake lights stuck on = dead battery = car no start = sad