TSB 21-2175 — Ford and Lincoln Service bulletin

21-2175 is a service bulletin on file with NHTSA for 6 Ford and Lincoln models, 2016–2019 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.

What the bulletin says. Some 2016 MKS, 2016-2017 Navigator, 2016-2018 F-150/Focus/C-MAX/Edge/Fiesta/MKX/Transit Connect/Mustang, 2017-2018 Continental/Fusion/MKZ, 2017-2019 Explorer, 2016-2019 Escape/MKC/Flex/MKT/Taurus/Transit/Expedition/F-Super Duty, and 2018-2019 EcoSport vehicles equipped with SYNC…

NHTSA's own summary of the document, quoted from the public manufacturer-communications file.

1Document filed
6Vehicles named
4Model years

Vehicles and model years 21-2175 names

VehicleModel years
Ford EcoSport 2018
Ford Expedition 2016
Ford Fiesta 2016, 2017, 2018
Ford Flex 2016, 2017, 2018, 2019
Ford Taurus 2016, 2018
Lincoln Navigator 2016

Every document filed under 21-2175

Document IDFiledType
TSB 21-2175 June 2, 2021 Service bulletin

What 21-2175 covers

Electrical — the component vocabulary NHTSA files this communication under.

← All Ford EcoSport TSB years All bulletin numbers

Questions buyers ask

What is TSB 21-2175?

21-2175 is a service bulletin filed with NHTSA by Ford and Lincoln, covering 6 Ford and Lincoln models across the 2016–2019 model years. NHTSA's summary reads: Some 2016 MKS, 2016-2017 Navigator, 2016-2018 F-150/Focus/C-MAX/Edge/Fiesta/MKX/Transit Connect/Mustang, 2017-2018 Continental/Fusion/MKZ, 2017-2019 Explorer, 2016-2019 Escape/MKC/Flex/MKT/Taurus/Transit/Expedition/F-Super Duty, and 2018-2019 EcoSport vehicles equipped with SYNC…

Which vehicles does 21-2175 cover?

NHTSA's file names Ford EcoSport (2018); Ford Expedition (2016); Ford Fiesta (2016–2018); Ford Flex (2016–2019); Ford Taurus (2016, 2018); Lincoln Navigator (2016). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.

Is TSB 21-2175 a recall, and is the repair free?

No. 21-2175 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.

How do I get the full text of 21-2175?

Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 21-2175, its date, and NHTSA's own summary from the public file.

Data updated 2026-08-29 from NHTSA's public records

Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 21-2175. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.