This particular dealer is passing off certain aftermarket parts as OEM parts to the consumer. When I first found out about this, I was surprised. After I found out about it is when I realized I should not be surprised by anything this dealer does to make additional profit. Was this a mistake? No. The parts come in different boxes that are clearly not from the Manufacturer. The parts department in this dealership still bills the OEM part number on the invoice, charging the matrix pricing (see earlier post) for a part that is inferior in quality and costed them less to buy.
Let's say that part were to fail in 10 months while the customer is out of town and they bring their vehicle to another dealership since they know the part is covered by the OEM part warranty. Now, another dealer goes to replace the part and they realize it is, in fact, not an OEM part. They will be unable to process a claim on the part and the customer will have to pay for the repair again.
As I stated earlier, this type of thing is not commonplace , as far as I know, in the industry. But I still advise you to do your due diligence when having your car serviced. Most repair shops, dealers and not, are trustworthy and are not there to take every penny they can out of your wallet. Shop carefully, and when you find a trustworthy shop, stay with them and build a relationship.