Remotes and Keys is commited to sourcing the best quality parts possible. We carry both OEM and replacement products. Obviously the OEM items will be the exact same as if it was bought at the dealership parts counter. The replacement "Generic" items are sourced from factories whose products are far superior to the cheap items you'll find on amazon, ebay, and competitor sites. All remotes are tested on Santronics Keyless Entry Testers before they are shipped to you. Many remotes are checked on other kinds of keyless entry testers besides the Santronics. When there is onboard programming, orders are shipped with programming instructions. Free expert tech support is included with purchases. Batteries are always included with products that use batteries.