On your factory lid, there is a 2 pin sensor, I think driver side, Thats the air temp sensor. The 5 pin mafs have the air temp sensor built in, and dont require the separate sensor. If you have the stock one on the air lid, you should not need to use the one of the Maf, the harness is really just an adapter to make the 5 pin work in a 3pin maf car.
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