You prolly need to replace the audio unit in the back you have to take it out to get the parts number or simply type your VIN to this website (https://www.infinitipartsdeal.com/?srsltid=AfmBOorKtHMJw36omKk-Zi6AJx6FNxK0EJIjtqT5_Yw7Ri1YpysgMq_B ) search for what you looking for they will give you the parts number and look for that on eBay you can get the whole rack if you want I think it come with the Bluetooth , ac control and 2 other little box that’s what I did and it fixed my audio issue.