Ford Massage Seat Not Working After Sync 4 Upgrade — SCMG & SCMH Fix (F-150/F-250/F-350/F-450)

Massage Seat Not Working After Sync 4 Upgrade? SCMG & SCMH Programming Fix

For 2015–2020 Ford F-150 and 2017–2022 F-250 / F-350 / F-450 Super Duty · Sync 3 to Sync 4 upgrade · Last updated: June 2026

If you’ve completed a Sync 4 upgrade on an F-150, F-250, F-350 or F-450 equipped with massage seats, you may notice the massage or lumbar function doesn’t fully work. This is normal after the upgrade, and it’s an easy fix.

Why it happens: the massage seat module firmware on these trucks predates the Sync 4 configuration. Once the massage modules — SCMG and SCMH — are updated to the latest firmware and re-programmed, the full massage and lumbar functions return to normal.

The full FORScan procedure to update and program the SCMG and SCMH modules is reserved for verified FordSync4 customers, because incorrect module programming can disable seat functions. Enter your order number and the last name on your order below to unlock the complete step-by-step guide.

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