If you are having problems with your Nintendo 3DS reading your game cards , then you need this 3DS replacement game card slot. It is brand new and the quality is equal to the original game cartridge slot on the 3DS. After you've replaced the game card slot, you'll instantly notice your games being recognized immediately. Corrosion, Over use, and lots of cartridge swapping can wear down the contacts on your 3DS cartridge port. This fixes faulty game cartridge slots for the Nintendo 3DS.