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oxygen sensor plug

  1. MKI, 84-89 NA & SC
    I just finished putting back together the engine of my 1987 MR2 (with 260,000 miles) after replacing a head gasket. Everything else, including the pistons, cylinders, and rings, were in mint condition! When I got to the end, there were two things I couldn't figure out. First, there is a...
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