my Matrix XR underwent an 50,000 mile inspection and it says "Passenger rear knuckle, lower control arm linkage has excessive play and making noise".

It'd be no problem if i listened to the technician and repair it right away. but the cost was almost $1300. it gets me really hesitating.
I want to know what problems this can cause to me. Does this a big threat to my safe drive?

your help will be appreciated (IMG:style_emoticons/default/liebe011.gif)