To determine which car key replacement you need, start by checking your current key or reviewing your vehicle’s manual. If your key has a thick plastic head, it likely contains a transponder chip that must be programmed to your car. If the key has unique sidewinder-style grooves, it is a laser-cut key that requires precision cutting and programming. For key fobs with push-to-start functionality, a remote start key replacement is needed. If you are unsure, a professional locksmith can examine your car and key system to determine the correct replacement key for your vehicle. Understanding the specifications of your key ensures that you receive a properly programmed replacement that works seamlessly with your car’s security features.