You cannot use "as is" as a cover for material misstatement and/or misrepresentation. Period. I've been in the car business for over 30 years. I also know a thing or two about what constitutes deceptive advertising.
The same language was used in the description for the same item in two previous listings. If "Sold as is" and "sold for parts/repair" didn't save the seller- not only once, but twice before, it's difficult to understand the rationale behind why it would now. In any case, I would be astonished if eBay does not rule in favor or the OP.