My daughter has a 1998 cavalier we just bought used about a month ago, she a little problem last week the car was involved with some flooding in the interior. When it came back from the shop after some repairs I noticed the airbag sensor light on, I found the sensor under the front passenger rug when I pull it out to dry. Could the water have affected it, and can I try to spray a electronic solution on the terminals to see if that will clean it. Or will I have to replace it and how much it may cost.

Thanks

Sure you can spray electronic contact cleaner on it. But if your daughter gets into an accident and the air bag doesn't go off and she's injured, you'll never get nominated for Father of the Year.

It's a safety item. It's your daughter's car. Replace the sensor.

Then sleep well at night.