I Actually get a different number than most here. So the 01 4.4 has been owned since 2002 and was bought as a CPO. Going through the records last week to try and find the warranty on a part that failed. Out of the 11 years I have owned it, I've replaced the boots every 2 years or so. The driver side has been replaced 5 times and the passenger side 4. The odd number is because the first time I changed it, I only did the drivers side. After that, I started replacing them in pairs. I get roughly 15K 20K out of them. Bought the OE boots twice and then started to buy the cheap ones from autohauzaz for $10 because I was replacing them so often. The very first time it happened, the dealer did goodwill and replaced them because it happened after 2 months of ownership. After it happened again, they tried to charge me and I saw the estimate and said "No". I've checked everything, had the X on the rack, etc to see if something was askew or if the boots were shot before I even put them on... but I guess the X just doesn't like em very much.

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2011 E70 50i M Sport