It would be outrageous if you have no money as you would also have to change the tranny as they are different and the 09's had a 3'5 not a 3.6 so you'd be hard pressed to find one.
Basically a pipe dream look for a 2.4
You are dealing with a 15 yr old vehicle that is going to be prone to electrical issues because of it's age
Wires get brittle corrosion takes over things start to go bad unfortunately.
You have the bigger brakes on yours ..There were the smaller ones until a decision was made to improve them and make them larger
One of the few wise moves made by the penny savers
Sometimes the thermostat opens and the car doesn't warm up to proper temp.
Mine has done it a few times but I just clear the code I don't mind it running a little cool and the remote start will work