Can the automatic climate control system and fuel economy display be added to the 3 after purchase?

 

Pretty much anything can be added after the purchase, it just depends on how much money you have.

 

This is probably one of those prohibitively expensive kinds of things. that being said give Jason (parts manager at Montomery Mazda in Charlotte, NC and webmaster of www.onlinemazdaparts.com) a call at 704-563-1510 EXT.141 and he could give you prices on the parts you'd need.