To give you the most relevant "useful feature," could you clarify if you mean: A feature available on a specific 2003 model? A maintenance feature from a dealership (like Auto Haus)? The Infiniti G35 Is The Best $5000 Car In The World
Available in premium models like the Infiniti G35. Auto House 1 (2003)
Early GPS systems and phone syncing.
Other notable technology and convenience features from that year include: To give you the most relevant "useful feature,"