I did some Googling. I have not independently verified these. I couldn't identify the Fiat that means dog sh*t.
Toyota MR2 stood for ‘Midship (engined) Runabout 2-seater’, but, sadly, in French ‘MR2’ happens to sound exactly like merde (sh*t)
Buick La Crosse launched in 2005 in the USA, the name LaCrosse referencing the sport. Across the border in Canada, however, it needed a new name, as ‘LaCrosse’ is slang for masturbation.
Isuzu: a small truck with a tipper rear was introduced with the name ‘Light Dump’. (Needs no clarification!)
Mazda truck called the Titan Dump. (Same idea.)
Audi E-Tron. Étron actually means turd in French.
Audi TT Coupe allegedly sounds to the French like tete coupé (head cut off).
Mitsubishi T-Box (a small ban) can be re-spaced as Mitsubi sh*t box.
Fiat Uno. Uni is Finnish for fool.
Honda Fit/Honda Jazz. They were going to call it the Fitta, but that is a rude word for the female genitals in some Scandinavian languages.
Chrysler PT Cruiser - a vehicle that many car enthusiasts think of as a sad parody of a real hot rod. Sometimes referred to as the Pity Cruiser.
Lamborghini Reventón apparently means burst tyre in Spanish.
VW Jetta. In Spanish, a jetta is a losing streak, or a run of bad luck.
Ford Pinto. Pinto = small penis in Brazil.
Citroen C-Métisse. Métisse was intended to refer to it having the hybrid option to run in 4 wheel drive, front wheel drive, or rear wheel drive. Unfortunately, a common French meaning of Métisse is bastard.
Rolls Royce Silver Shadow. In German, mist is dirt or crap.
Ford Kuga may sound like cougar (itself, a slang term for sexually predatory older woman) but in Slovenian and Serbo Croation, it means pestilence or black death.
The Mitsubishi i-MiEV (Mitsubishi innovative Electric Vehicle). In German, Miev is a smell.
VW Vento. It may go as fast as the wind (probably) but in Italian it is a colloquial term for fart.
Chevrolet Nova, and Lada Nova. No va means doesn't work or won't go in Spanish.
Daihatsu Scat. Scat is animal poo.
Mazda Laputa. La Puta = female dog or prostitute. However, Laputa was also a fictional island in Gulliver's Travels.
Mitsubishi Pajero. In some Spanish languages/dialects, Pajero means w*nker.
Hyundai Kona. In Portugese, kona = c*nt.
Also, from my own memory, the motorcycle, Yamaha TDM, not considered a particularly exciting bike, and it is often affectionately referred to as the tedium.