If you are looking for affordable auto insurance online then it is a good idea to know what discounts you can receive from insurance companies. One of these discounts that you could receive is from having an anti theft device installed in your car. This device could be in the form of an engine immobilizer, an alarm system, or a tracking system that can be activated remotely if required. If you do not have any of these installed, then do not just rush out and buy them because they could end up costing you thousands of dollars which is much more than you can potentially save on your auto insurance. Be sure to mention any of these devices to your insurance company and see if you are eligible for a discount.