If the AD comes out it is auto on our system. Yes oem cly cracked but let's compare apples to apples. Ie hours to hours. The older the cly the more likely it is to crack. So are these 1st service life cly that are failing or second or 3 rd time around the block. If they are 1st then not hard to see why the looking at them careful. Funny that is why we do a leak rate check one of the things we also look for but some think a leak rate is not relevant
Cheers