Everything here is matched on the manufacturer part number. Because these are low-volume items, the part number is a more reliable identifier than any description, and each listing gives the model and year range the part covers.
If you cannot find a part in the main categories, the fastest route is to search on the number stamped on the component you are removing. Part numbers that have been superseded are the usual reason a search comes up empty — if the number you have does not return a result, send it to us and we will check the current reference.