I have 2010 with 89k miles for 6 months. My car has only driver door sensor for keyless locking/unlocking. I wonder if there is any possibility to add more sensors (for example change front passenger handle to one with have sensors on it. Same with boot). Is it possible, o there is no wiring if handles does not have sensors?
try googling the question. someone here did it a year or two ago, maybe you can find the thread. it was a lot of work, but not too expensive, iirc. it has not been done often though. all the best!