So I just replaced the battery last week and had my alternator checked but this morning it took about 8 times to start the car. When I put the key in and turn it the car does nothing. Could it be a bad fuel pump? I have a 2006 with 85,000 miles on it.

 

I believe it is the NATS having problems!!! The immobilizer is not allowing you to turn the car on because it cannot recognize the Chipped key signal!

 

So which part would need to be replaced? Would I need to get new keys?

 

NATS Antenna, BCM, ECU, New Chipped Key... any of those parts might be causing the problems....!!! Some say just replaced the NATS but some say you need to replaced both the Antenna, BCM and Re-program remote keys!!!! I haven't fix mine yet but I can still start my car just sometimes it takes second try to fire it up!