[header] How to find the 5 digit default keyless code on ford explorer or mercury mountaineer [title] Look for the factory code. [step] Whether you're the sole owner or have a pre owned car, the ford explorer or mercury mountaineer will come with a factory code and owner's manual. It is recommended that a new owner change the original five-digit factory code. 
Hopefully, you have kept the factory code in a safe place. [substeps] The 5 digit security code is usually in the glove department if you have not moved the owner's wallet card.