I just replaced the passenger side set of boots last month, 81,000 miles. Noticed the drivers side open yesterday, note to self, if 1 side goes replace both sides ASAP. I rember inspecting the drivers side and it didnt look dryroted or cracked so its a were issue. Keep in mind if you ever need to replace the whole CV on either side your cost will be between 5 and 600 each, so look at your boots often, im lucky I spotted them in time. Theres a place around here that rebuilds them for around $150 so if anyone needs yours rebuilt they grind your old ones and replace the balls with bigger ones. The place is called Florida Front Wheel Drive 407-845-6872. I purchased my CV boots from them and they do pretty good work.