Mazda B-Series Truck 1991–2001 — technical service bulletin
Bulletin 0901501 · NHTSA communication 634439 · issued Dec 21, 2001
Technical service bulletin
communication type
Equipment
component
1991–2001
model years
13
vehicle entries
Official summary
Subject regarding a whining/buzzing noise from radio speakers. *slc
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.