B3000: owner reports and bulletins

Body. We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got B3000 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

32 complaints filed with NHTSA mention B3000, 3 of them since 2015, across 4 different models. The component owners most often filed it under: air bags.

Most-reported models

VehicleComplaintsModel years reported
MAZDA B-SERIES TRUCK271994, 1999, 2000, 2001, 2002

Manufacturer service bulletins that name B3000

2 technical service bulletins and manufacturer communications filed with NHTSA mention B3000, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • MAZDA CX-30 (2020, 2021, 2007, 2008), bulletin 10201777: Ethanol is becoming a common additive in gasoline. Gasoline containing ethanol is likely available at your local gasoline station. Typical blends of ethanol include E10 and E85. E10: A blend of 10% ethanol and 90% gasoli…
  • MAZDA CX-7 (2007, 2008, 2009, 2010), bulletin 10202695: Ethanol is becoming a common additive in gasoline. Gasoline containing ethanol is likely available at your local gasoline station. Typical blends of ethanol include E10 and E85. E10: A blend of 10% ethanol and 90% gasoli…

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.