TSB 21B09-S1 — Lincoln Service bulletin
21B09-S1 is a service bulletin on file with NHTSA for the Lincoln MKZ, 2015–2016 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. The North America 3G cellular service began decommissioning in August 2021 and a complete shutdown of the 3G network took place in February 2022. Vehicles on the road equipped…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 21B09-S1 names
| Vehicle | Model years |
|---|---|
| Lincoln MKZ | 2015, 2016 |
Every document filed under 21B09-S1
| Document ID | Filed | Type |
|---|---|---|
| 21B09-S1 | July 28, 2022 | Service bulletin |
Questions buyers ask
What is TSB 21B09-S1?
21B09-S1 is a service bulletin filed with NHTSA by Lincoln, covering the Lincoln MKZ across the 2015–2016 model years. NHTSA's summary reads: Certain 2014-2020 Model Year Multiple Vehicle Lines - 3G Telematics Control Unit to 4G Upgrade Kit. The North America 3G cellular service began decommissioning in August 2021 and a complete shutdown of the 3G network took place in February 2022. Vehicles on the road equipped…
Which vehicles does 21B09-S1 cover?
NHTSA's file names Lincoln MKZ (2015–2016). 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 21B09-S1 a recall, and is the repair free?
No. 21B09-S1 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-S1?
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-S1, its date, and NHTSA's own summary from the public file.
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-S1. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.