No effect, at all.
There are different stores that sell a variety of remote car starters. Walmart sells one model for about $500 without tax. Auto Zone, Sears, and Best Buy also sell remote car starters. Nowadays you can also ask dealerships for cars with remote starters.
A remote car starter is a valuable aftermarket accessory for your car. The some benefits of having a remote car starter are theft prevention, safety and its convenience to use.
they are placed in the engene to start the car
I need three batteries for remote starters where do I purchase them? Can I have them shipped
Most remote car starters are located in the bottom of the dash board, usually under the steering column. Some newer cars with remote starters built in may have the starter in a location other than in the dashboard, but if you are installing the car starter yourself, you will most likely put at the bottom of the dashboard unless instructions indicate otherwise.
Dr. Detail
No, they are designed to turn the vehicle off if attempts are made to steal the vehicle. Each remote starter also has its own unique signal or "encryption" to prevent other remote starters from starting your vehicle.
One can purchase a remote car starter at Best Buy either in store or online. Alternatively, Amazon and eBay also have remote car starters that can be purchased.
Remote starters have no effect on other cars.
Amazon.com sells remote car starters for nearly any model of car. You can also buy them from the websites of electronics stores like Bestbuy.com and those of auto parts stores.
Yes it depends what you have. Usually the good starters will let you program it to more than 1 car.