There has been more and more problems with aftermarket parts. Lot of parts are just cheap, bad quality and poor fit. We specialize in Volvo repair only and more then ever we are choosing to go with not just OE (that doesn't mean anything now days), but VOLVO parts from a dealer. There is a lot of parts in aftermarket world, that are genuine Volvo parts, but a lot of them are parts that have been superseded and parts that did not passed QC and we're not good enough to be sold to VOLVO.
We've established good working relationship with local dealers and unfortunately spend a lot of money with them. However, we can rest assured that our customers get what they paid for. More so, it is less expensive to fix it right the first time, then deal with parts warranty and at the end, we would pay out of our pocket to put in a Volvo part anyway and technicians wage.
It is difficult to depend on brand name of parts. There are brand name parts that we've used 20 years ago and they we're top notch, but now days it is a hit and miss. It's so sad and makes life so much more difficult.