In South Africa, legislation allows new entrants to manufacture locally and we have started a project to produce certain parts using additive manufacturing technology.
I need to establish what the conditions are for us to replicate an OEM part using this technology and what tests and approvals would be required to allow us to sell direct to the market.
If your customers will be direct OEMs (For example Ford, GM, Daimler, VW, etc.), you should discuss the product tests with your customer and consider the technical drawing of the product. But if your customer is going to be the market, duplicating the OEM part and putting it on the market is an "aftermarket" job.
The IATF 16949:2016 standard has excluded the aftermarket.
Therefore, you can know what kind of tests are required only by learning what the original product tests are.