In the opening credits for the second season, both Dee and Mama are added, with Dee shown running out of her house and Mama ordering her back inside. However, the house Dee exits does not appear to be the same one (although it is similar) to the house Raj is shown exiting since the opening credits of the first season.
Throughout the entire series, it is made very clear that neither Mama nor Raj have a car, as often indicated by Mama needing to ride the bus to work and Raj always needing rides from other people (or walking) to his many adventures and escapades. Yet, in the very first scene of the opening credits, Raj is seen exiting his house with two cars parked in the driveway.