Rather than the dealer, try some aftermarket shops that sell automobile electronics like stereo, and security systems. many install stuff at dealers so they have experience and usually less costly. My dealer installed remote start was not working. I went to a local one man shop with all kinds of stuff lying around run by a guy in his 60's. I have a 09 Murano. He looked behind the dash with a flashlight, opened up and removed the gauge cluster, found a lose wire and reset it in three minutes. Charged me 1/2 hour labor $45.00.
Good luck