When it rains it pours, right? After having to get a new battery last week, 3K miles outside the warranty milage ,I discovered upon the tire rotation that a CV boot had split and had thrown grease all over the inside rim. This was at 53K miles.After hearing the cost decided to do only the one side which had split. If you have had CV boot problems,I like to hear from you at what milage your CV went, one side or both. Will the other boots acts up as well, is there a certain life expectancy here?An independent stated that its cheaper to go with a rebuilt axle unit period! I rather keep my undamaged axle instead of getting who knows what! What do you think?