B1861: owner reports and bulletins
Got B1861 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.
What owners report to NHTSA
14 complaints filed with NHTSA mention B1861, 11 of them since 2015, across 5 different models. The component owners most often filed it under: air bags.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| LEXUS IS 250 | 8 | 2006, 2008, 2014 |
| LEXUS IS | 3 | 2007, 2008 |
Manufacturer service bulletins that name B1861
2 technical service bulletins and manufacturer communications filed with NHTSA mention B1861, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- LEXUS IS 250 (2006, 2007, 2008), bulletin 10155243: Dealer Package: Lexus has received reports regarding an illumination of the SRS warning light in some of the subject vehicles even though the airbags are functioning. Due to a design issue in a connector, some degradatio…
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.