Simplify the following text for a Grade 5 native English-speaking person.
Original: The first generation 9-3 , a substantially improved ` new-generation ' Saab 900 was launched in 1998 for the 1999 model year .
Simplified: The Saab 9-3 is a car produced by Saab since 1998 . It is the successor of the 900 , and it is now in its Second generation .