My 2001 infinity qx4 left me started it didn't start got lights the battery is good i just put a starter on it like 3 months help plz

Hello, what have you done to know that the "battery is good"? Hands-on testing is really needed to verify that components work properly. Your battery might have the proper voltage, but may not be able to sustain a load. This is the most possible and likely cause of your concern. Secondly, check for any issues with possible corrosion at your battery terminals or the cables. There are several possible causes to slow or no cranking. Seek testing from a local shop near you. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops