Ford / Lincoln / 21N03-S4

Ford 3.5L Cam Phaser Program 21N03: Terms & Deadline

The document describes cam-phaser rattle after an extended shutdown or knocking at warm idle.

Original document reviewed · Sep 29, 2026
Historical program

Both deadlines stated in this document have passed. This page explains the historical response, not a current entitlement.

01 / Manufacturer response

What did the manufacturer do?

For qualifying vehicles still noisy after the specified PCM update, Ford directed replacement of all four cam phasers.

02 / Applicability

Which vehicles are listed?

Certain 2017–2020 F-150 and 2018–2020 Expedition/Navigator vehicles with the 3.5L GTDI engine; plant and build-date restrictions apply.

The document describes a defined set of vehicles and conditions. A matching badge or model year alone is not an eligibility decision.

03 / Coverage conditions

What should you check first?

  • Do not treat this bulletin as a current free-repair offer.
  • Ask the dealer about repair history and any separate current coverage.

Take these questions to the dealer.

Ask for the eligibility result, diagnosis and any customer contribution in writing. Keep earlier repair invoices if reimbursement may apply. Recallfolio does not check or store your VIN.

The evidence behind this page

Read the original record.

Manufacturer reference
21N03-S4
NHTSA communication
10209366
Record date
Mar 25, 2022
Evidence pages
1, 2 of 17

Our wording summarizes buyer-relevant facts. The original document controls the stated terms; the manufacturer must confirm current applicability. We have not independently verified each vehicle’s condition or established that no later document exists.

Source verification details

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