I also get faint smells of coolant through the vents in the car... but she runs fine. (mechanics.stackexchange.com)
As I am writing this I am still getting faint smells from the stink bomb my son let off during my family super bowl party.... (thefashionfuse.com)
Another thing I wanted to mention in the makeup review of Makeup Revolution salvation lip lacquers have a light and faint smell of a very pleasant vanilla scent, which does fade very fast. (smashinbeauty.com)