TSB 21B09 — Ford and Lincoln Service bulletin

21B09 is a service bulletin on file with NHTSA for 3 Ford and Lincoln models, 2015–2018 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.

What the bulletin says. Certain 2014-2020 Model Year Multiple Vehicle Lines 3G Telematics Control Unit to 4G Upgrade Kit REASON FOR THIS SUPPLEMENT Program Terms & Urgency / Expiration Date: Program extension until July 31, 2023. Service Action: o IDS level 128 or higher is now required to address…

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

1Document filed
3Vehicles named
4Model years

Vehicles and model years 21B09 names

VehicleModel years
Ford Focus 2018
Lincoln MKX 2016, 2017
Lincoln MKZ 2015, 2016, 2017

Every document filed under 21B09

Document IDFiledType
21B09 S2 April 12, 2023 Service bulletin

What 21B09 covers

Electrical — the component vocabulary NHTSA files this communication under.

← All Ford Focus TSB years TSB lookup by model

Questions buyers ask

What is TSB 21B09?

21B09 is a service bulletin filed with NHTSA by Ford and Lincoln, covering 3 Ford and Lincoln models across the 2015–2018 model years. NHTSA's summary reads: Certain 2014-2020 Model Year Multiple Vehicle Lines 3G Telematics Control Unit to 4G Upgrade Kit REASON FOR THIS SUPPLEMENT Program Terms & Urgency / Expiration Date: Program extension until July 31, 2023. Service Action: o IDS level 128 or higher is now required to address…

Which vehicles does 21B09 cover?

NHTSA's file names Ford Focus (2018); Lincoln MKX (2016–2017); Lincoln MKZ (2015–2017). 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 21B09 a recall, and is the repair free?

No. 21B09 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 21B09?

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 21B09, its date, and NHTSA's own summary from the public file.

Data updated 2026-08-20 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 21B09. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.