| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure for an air flow sensor fitting part preventing erroneous assembling without increasing the manufacturing cost in case of changing only the cross section of the passage of an inlet pipe for fitting the air flow sensor according to respective engine specifications (displacement). SOLUTION: This structure for the air flow sensor fitting part provided in the inlet passage R is provided with the inlet pipe 6 having a first insertion hole 22 for inserting the air flow sensor 23, and a flow pipe diameter changing member 26 capable of being inserted in the inlet pipe, formed with a second insertion hole 28 stacked with the first insertion hole 22, and capable of changing the inside diameters d1 and d2 of the inlet pipe.
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