Ask which make, model, year, engine, and variant the buyer checked, then compare those details with the part number and fitment source used in the listing. Preserve the original description and order messages until you understand whether the mismatch came from the vehicle, the part, or your own information.
Inspect the returned part and packaging, and record whether it was fitted, altered, or damaged. Apply the return terms you gave the buyer and any consumer protections that apply; do not assume the customer is at fault when your fitment wording was broad or incorrect.
Correct the listing if it overstates compatibility, and check other stock only when the same source or batch may be affected. Agree any refund, replacement, transport, or other resolution directly with the buyer and confirm it in writing before changing the stock status.
