Only thing i can think off, when you run Auxiliary, could be a bad cable. But as far as bluetooth, it could be just the type of music you have...Might be recorded in Mono instead of stereo...

 

Try streaming something from pandora and see if this is still an issue to rule out the type of file you are trying to play. Then try using the aux cable and see if you get the same results.

 

Try some headphones in the phone. Maybe something is wrong with the phone.

 

Thanks for the responses. I tried a different phone as well as pandora and a different auxiliary cable with the same results. Only sound from the left speakers. When I switch to radio or cd, all speakers work perfectly.

 

Only other thing besides from what Shady_37 said is that it might be the head unit. But it sounds like it could be the phone itself..... or take it to the dealer and see if it is the actual head unit

 

Hey, were u able to fix it. I am facing same issue in my mazda 6 2008 gh?

 

On a 6 year old thread? I doubt it. But it sounds like the jack is bad.