Summarize this article in one sentence.
Many companies will guarantee the remote starter for as long as you own the vehicle. While the system is under a warranty, the remote itself is rarely warranted for more than a year or two, so find out what the remote replacement cost will be. A dealer cannot void a warranty if equipment is added. It is against the law. The dealer can however, void the warrant if the installation of the equipment causes any damage to the vehicle. A professional remote starter company and shop should be used to avoid any damage and void of your warranty.

Summary:
Read the warranty information on both your vehicle and the remote starter system. Check with your current vehicle warranty information.