Mazda RX-7 1979–1995 — technical service bulletin
Bulletin 00398 · NHTSA communication 603907 · issued Jul 16, 1998
Technical service bulletin
communication type
Power Train
component
1979–1995
model years
16
vehicle entries
Official summary
Experiencing oil leak at rear stationary gear o-ring / on - car replacement procedure. *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.