BASICS / 3 MIN READ

Superseded part numbers, explained

Why a part number changes, how to read a replacement list, and what to check before you order.

A superseded part number is an older number that a maker has replaced with a later one. The replacement is listed for the same units. Sometimes it is the same part with a different label; sometimes it is an improved design.

Why numbers change

  • The maker changed a supplier, a material or a connector.
  • Several similar parts were combined into one that fits more models.
  • A design change fixed a known problem.

How to read a replacement list

Every PartFind part page has a list titled "Replaces these part numbers". If the number on your old part is in that list, the part on the page is listed as its replacement. Search any of those numbers and you land on the same part.

What to check before you order

  1. Confirm your model number is in the part's fit list, or use the fit check on the part page.
  2. Compare connectors and mounting with your old part. A later design can include an adapter or a different plug.
  3. Read the install notes that come with the part. Some replacements need a small wiring change.

When a number is not found

If a number finds nothing, it may be a model number, a serial number or a typo. Check for a 0 that should be an O. Still stuck? Send the number in a quote request and we will look it up.

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