subject: Why Porsche 911 Parts are amazing [print this page] Lastly, when ordering a part, there are core charges that the manufacturer charges the buyer for. A core is the old part you are replacing. When you buy a re-manufactured part, manufacturers need the core so they can rebuild it and add it to their inventory. The core charge is like a deposit -- you pay it when you place the order, but it's refunded if you send back your old part.