I am getting yellow light on my 2005 X type , I was told it is likely Yaw sensor ? Is there anyone who sells the part, ?

Code 1279 , Yaw Rate Sensor Circuit Failure

 

My first recommendation is to take it to a facility that can access the modules to make sure that the problem is the yaw sensor. The average OBD tool can not read the modules. If you have confirmed that is actually the problem.
A good source of parts is to reach out to Dr Dome. He is a forum member that parts out x-types and see if he has what you need. Call or text 484-903-4813. He is highly trusted and praised by our members.
Tell him Vern recommended him.

 

That code is missing a letter.