M.B. DOC, thanks for the reply.

While waiting for the oxygen sensor to arrive (from Fastlane of course), the check engine light turned itself off. Considering I now have the part, should I go ahead and replace the sensor anyway?

Once again, I getting the temptation to buy a OBDII scanner.

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1998 E320 120K mi
1991 Miata 80K mi
2001 Ranger 109K mi