Damaged wiring to the seat belt pre-tensioner sensor may cause the Airbag Warning Light to illuminate.
Car Problem Reports
Mazda Mazda3 Airbag Warning Light Illuminated
Mazda Mazda3 Problem
Average Mileage: 109,000 mi (59,000 mi - 186,000 mi)
Visitor, 2007 Mazda Mazda3, 126,000 mi
for a while horn didn't work - now passenger airbag light is on all the time
airbag warning sign is illuminated