Can I Sue A Toyota Dealership For Selling Me A Used Lemon?

I bought a 2005 Acura TL from a used Toyota Dealership 2 weeks ago around 11/18/13, I had 3 days from the date of purchase to get my deposit back $6, 000 and I'm just finding out I also had 7 Days to exchange for another car, "I was never told that." 4 days after driving it off the lot, Bluetooth went out, car started to stall do to low battery voltage, I have to crank it instead of it starting right up, bang on the dashboard so the lights can come on a night and finally the check engine light comes on. This is within 2 weeks of getting the car, and I'm going back and forth to the Toyota dealership during this time and they finally tell me to get a diagnostic from a Acura Dealership that I had to pay $180 for. It turns out the car needs $3, 784.32 of work. Including Air fuel sensors that needs to be replace to pass smog in Feb of 2014 which is $2, 034 it's self. But the Car Fax states the car passed State Emissions Inspection and Pre-delivery inspection and had a Filter and Oil change on 10/05/13. The Mechanic at the Acura dealership who ran the diagnostic told me that's impossible because the codes for the Air fuel sensors would of showed, It's critical, and also the transmission oil and motor oil is very dirty and I would have to change that As soon as possible, also the steering pump is leaking. The Car Fax showed a clean record. The Acura mechanic also told me it's possible that the check engine light has always been on and the Mechanics at the Toyota Dealership had put a temporary fix so it could pass smog and put up for sell, from what I know that is Illegal.

Sorry for the typos I'm typing this from my iphone lol.

If you can prove that they knowingly misrepresented the sale (i.e. Hid something that was obviously wrong with the car) then you might have a case. However, that is very hard to prove, especially with a used vehicle. And car salesmen, being the slimy sort they are, tend to know how to play the game.

You're in a tight spot. You can either spend the money on a lawyer and hope to beat the car people at their own game (high risk but possibly high reward) or you can grit your teeth and pay for the repairs and think of it as an education. I'd do the latter, but I would take it somewhere else, why pay the people who may have ripped you off anything more at all?

Whenever I buy a used car, I always hold some money back out of my budget because I KNOW that there are going to be repairs needed. People either fix up their car OR sell it (sometimes both but not all that often and people who fix them up to sell only do the cosmetic bits and only do the skimpiest job possible on the mechanical bits).

You can sue anyone for any reason. What you are able to prove in court is a different matter. You bought a 9 year old used car in "as is" condition. That means you have no warranty. This is on you for buying it.