Ford F-53 2020–2021 — technical service bulletin
Bulletin SSM 51447 · NHTSA communication 10233726 · issued Mar 15, 2023
Technical service bulletin
communication type
Service Brakes, Air
component
2020–2021
model years
4
vehicle entries
Official summary
Some 2020-2021 F53/F59 Stripped Chassis vehicles may experience an illuminated anti-lock brake system (ABS) warning indicator with diagnostic trouble code (DTC) C0037 and/or C003A. If normal diagnostics lead to replacement of the tone ring, be advised that the tone ring has been superseded with improved parts for both the passive (MU9Z-2C026-D, open shutter design) and active (MU9Z-2C026-C, closed shutter design) systems. Follow Workshop Manual, Section 206-04 for tone ring replacement.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.