There might be some DLC you can get through Xbox Live. I think there was a promotional deal for downloading Priuses (for free) a year or so ago. If there is some DLC available, it's still going to be very limited.

i take advantage of thesimsresource, it works for many issues yet as quickly as I attempt and procure gadgets, they setting up effective yet as quickly as I click on them in purchase mode, my activity crashes! additionally as quickly as I acquire lots they dont look >.< please help!