Simplify the following text for a Grade 3 native English-speaking person.
Original: The Saab 9-5 is an executive car produced by the Swedish automobile maker Saab . The first generation was introduced in 1997 as the replacement to the Saab 9000 for the 1998 model year .
Simplified: The Saab 9-5 is a car produced by Saab since 1997 .