I just installed it and connected it with the wiring behind the stereo, it works fine but I have a ground loop whine now. I wanted to know if anyone had any other suggestions on where to connect the power and ground wire away from the stereo.

I currently also have my gages connected back there with no problem or whines. So I know its the ground on the wideband.

 

I connected mine to the power of the 3 OEM gauge circuit in my MR. Since you have an MR that should be a good choice for you too.

 

Yea I used the wire harness from the gauges but still have the annoying high pitched whine.

 

I have the same thing. When my headunit is on it happens but when I shut it off it goes away. IDK what to do about it.

 

There is a ground loop between all the wiring. First i tried was grounding the gauges and wideband in the same spot but nothing changed.

I guess I'll try and ground the stereo with the wideband and see if that works.

 

I connected mine to the Key on power in the ignition harness, its the black and white wire.