HIII IVE GOT MAZDA 3 2009 I INSTALLD YESTERDAY Multimedia system car every thing working well now to the problem when i making a call or Listening to music via BT there is noise from the front left & rear left speakers AND I AM USEING IPHONE 4 IT IS COMING ONLY WHEN I AM MAKING A CALL OR LISTNING TO MUSIC VIA BT DOES ANY BODY KNOWs WHAT I SO DO ?? IVE BIN IN THE CAR STEREO STORE AND THE GUY TOLD ME THAT THE IPHONE is the problem (( IF ANY BODY HAVE A BETTER IDEA OR AN ANSWER FOR IT ILL BE GLAD THNKS VERY MUCH

 

So you installed a multimedia kit yesterday and it is causing noise from the speakers when using AV2DP streaming or making a call. Did I get that right? What kit did you use? How is it connected to the car? Are you charging the iphone during use?

Borrow someone else's phone and see if you can reproduce the sound with a non-iphone that way you can rule out if it's the phone or the kit.