If a customer receives the wrong part from Denso Auto Parts, it is important to take the correct steps to resolve the issue. First, the customer should review the order confirmation details, including the part number and description, to verify that the incorrect part was indeed sent. After confirming the mistake, the next step is to check the current web page for guidance on the return process and specific instructions for reporting discrepancies. Typically, Denso Auto Parts provides information on how to initiate a return or exchange and may require specific details such as the order number and photographs of the received part. It is also advisable to keep the original packaging of the part, as it may be needed for returns. The customer should remain courteous and patient throughout the process to ensure a smooth resolution.