clicking sound with no start

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! C'mon Sonic! No one has time for shenanigans like this! If the anti-theft light is turning on, it could indicate an issue with the vehicle's security system. If your new key is aftermarket, the immobilizer system may not recognize it, and it's entirely possible that it is intermittent. Or, the new starter was bad out of the box. Make sure your ground is connected well and the cables on the battery are tight and corrosion-free. If you have any other questions, please call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!