I bought my daughter a 2010 jeep wrangler 4 door and everything worked properly during test drive. On the way home, it threw a code saying there was a problem with the knock sensor. Took it to dealer, they ended up replacing several sensors and now it says there is a VIN mismatch - the dealer can't get it to take. I checked in on it this weekend and now the fuel gauge, speedometer, and AC don't work. Dealer says they can't find anyone to flash the ECM? to fix the issue, but it's mechanically sound. Am I wrong in thinking it is not because of the new issues? I fear we're going to have to go through buyback and start fresh....