Civic L4-1668cc 1.7L SOHC MFI (2003)
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If no key code can be found on the iN or with the Matrix H High Security key Codes Book, remove one tumbler at a time from the old
inner cylinder, and match the number stamped on the old tumbler to a new tumbler from the kit. Insert the new tumbler and spring in the
appropriate new inner cylinder cavity.
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Do not use the old inner cylinder, springs, or tumblers.
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Using your thumb and forefinger, hold the tumblers in place, insert the key in the cylinder and verify that all tumblers are flush with the
cylinder. If not, double-check the key number, the cutting key code, the tumbler numbers, and the cavity locations.
NOTE:
If the key cannot be inserted, check the tumbler in the "J" cavity. It may be out of position.