Mazda B-Series Truck 1998 — technical service bulletin
Bulletin 00498 · NHTSA communication 602650 · issued Oct 22, 1998
Technical service bulletin
communication type
Engine and Engine Cooling
component
1998
model years
1
vehicle entries
Official summary
Some vehicles may experience a boom noise while driving at 2500-3000 rpm. *yc
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.