re: #228 FFL (GOP Delenda Est)
Probably not a great contribution but my Mazda 323 once “just quit”. Turned out to be a cracked crank shaft.
Edit: Though I think that’d be a detectable condition and not something that is repaired and then just dies again.
My 323 “just quit” on a business trip to Duluth when the timing chain broke. Luckily it didn’t do any other damage to the engine and I was able to get it repaired and back home by the next evening.