Service bulletin SSM 53639

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

NHTSA's summary

Some 2025 Expedition/Navigator vehicles may exhibit a failure to communicate with state emissions testing equipment due to equipment that has not been updated to be compatible with the new testing protocols. If this concern occurs, contact the state inspection administrators helpline for direction and reference the Ford SAE J1979-2 Announcement found at OBD Clearing house website at https://www.obdclearinghouse.com/.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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