These are horribly made. The bags are great but the gas escapes out of the seals now. Remember when the bags would go? Now that they have solved the bag issue It’s the construction of the unit that’s bad. They only sell remanufactured units at MB. So, maybe they will last longer than the originals. This one even the oil leaked out the top. My warranty company denied the LH side but paid for the RH side. I bought my own and had it replaced. I’m suing the warranty company for breach of contract.