B1821 on Toyota

Open side airbag (squib) circuit, driver seat side (Toyota)

Severity: Inspect soon

An open side squib circuit means the side airbag may not fire, and the code turns the SRS light on.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

This page covers only what differs on Toyota. For what B1821 means, the ranked causes and the test order, see the B1821 guide.

2004–2008 · Camry Solara
Supported by vehicle data
Toyota repair manual supplement describes B1821 and B1826 as an open side squib circuit. Whether it is still current is not verified.
2011–2012 · Sienna
Supported by vehicle data
Toyota improved terminal crimping of the side airbag for B1821 and B1826. Whether the bulletin is still current is not verified.
2004–2006 · Camry
Supported by vehicle data
Owner complaints quote B1821 as an open in the driver seat side squib circuit and a pinched seat connector.
2006 · Prius
Supported by vehicle data
An owner complaint quotes a dealer saying B1821 needs the side airbag wiring assembly replaced.

EL002-08Status unverified
Toyota repair manual supplement for SRS light with B1821 or B1826 open side squib circuit
2004–2008camry-solara · NHTSA 10024310
2004-2008 Camry Solara. Summary says open side squib circuit; updated May 2008.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
TSB-0172-12Status unverified
Toyota Sienna intermittent SRS light with B1821 and/or B1826, side airbag terminal crimping improvement
2011–2012sienna · NHTSA 10047943
2011-2012 Sienna. The fix improves terminal crimping on the side airbag.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Toyota EL002-08: Toyota repair manual supplement for SRS light with B1821 or B1826 open side squib circuit — NHTSA (manufacturer communication)
Toyota TSB-0172-12: Toyota Sienna intermittent SRS light with B1821 and/or B1826, side airbag terminal crimping improvement — NHTSA (manufacturer communication)
NHTSA complaint ODI 11654816: Toyota Camry 2004 — NHTSA (owner complaint)
NHTSA complaint ODI 10504057: Toyota Prius 2006 — NHTSA (owner complaint)

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error