MJ1 ✓ Factory-verified

Oldsmobile · Regular Production Option

Transmission, manual, 5 speed, 3.94 final drive

Years 1998 Models 1 Factory citations 1

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Also documented for ChevroletPontiac

Documented applications

Achieva — N-body (1992–1998) →

• 1998 ✓ Factory-verified

  platform-list code; no source shows whether the Achieva offered it.

  ⛭ GM factory document — 1998 oldsmobile achieva rpo code list, p.1.

This page aggregates every documented appearance of MJ1 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.