TSB A21100B — Honda Service bulletin
A21100B is a service bulletin on file with NHTSA for the Honda Fit, 2020 model years, filed and re-filed as 3 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. ServiceNews Article - There are several possible causes for the SRS DTC U3000-49 (Internal Failure of the SRS Unit) to be stored. If you can duplicate the DTC, the troubleshooting will take you through the step-by-step process in isolating the faulty component. In most…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years A21100B names
Every document filed under A21100B
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| A21100B | January 29, 2022 | Service bulletin |
| A21100B | January 4, 2022 | Service bulletin |
| A21100B | October 22, 2021 | Service bulletin |
What A21100B covers
Airbags, Seats & interior — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB A21100B?
A21100B is a service bulletin filed with NHTSA by Honda, covering the Honda Fit across the 2020 model years. NHTSA's summary reads: ServiceNews Article - There are several possible causes for the SRS DTC U3000-49 (Internal Failure of the SRS Unit) to be stored. If you can duplicate the DTC, the troubleshooting will take you through the step-by-step process in isolating the faulty component. In most…
Which vehicles does A21100B cover?
NHTSA's file names Honda Fit (2020). 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 A21100B a recall, and is the repair free?
No. A21100B 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 A21100B?
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 A21100B, 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 A21100B. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.