The classic car which appears in the "Ghost Car" PSA at the beginning of this episode closely resembles a 1955 Buick Special Sedan.
The sentient appliances (and the sentient SUV) in dr.Freeman's house are a reference to the "The Brave Little Toaster" animated movie.
Interesting. Do you have a source on this?
::chuckle:: Not about TBLT, a source to back up that the episode is a reference to it. Otherwise one can only say it "might be an allusion to"