(Sorry I'm not good at English)

Hi, My 8 is 04 automatic.

When cold weather(under 0 degree celsius) full turning handle left or right, I heard very big sound from under the car(not sure front or rear, but may be rear).

It's like heavy metalic sound and it comes 2 or 3 times(when car is moving)

Is it something broken noise? It is not heard over 0 degree celsius.

 

Does it sound a "popping" sound like a metal hitting metal? You could have a damaged or loose steering component that binds and pops out of place when turning. Cold weather makes metal shrink so the cold weather may just be making a damaged part more noticeable. If you can or know how, check your steering components and bushings.

 

Thanks Krod26. I'll check steearing components and bushings

 

Check front lug torque as well. There is a problem with a coating on, I think, the rotor. I seem to recall that the original torque spec was in the 80's, and the fix was to go to the high 90's.