Possible Causes
WARNING: This page is about a different car, the 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
DTC 51/B0107 could be caused by a short to ground in squib circuit, squib malfunction or air bag sensor assembly malfunction.
NOTE:
During testing, if DTCs other than DTC 51/B0107 are displayed, disregard them.