Nissan has a sectioning/partial replacement at factory seams procedure for the front lower rail. The procedure can be found at

A tool that may be used to find out if the vehicle maker has a partial replacement or sectioning procedure is the I-CAR developed OEM Partial Part Replacement Search.

To find the procedure: Purchase subscription to Nissan > Login > Click Publications > Do a search for Service Manuals and the vehicle > Section K > BODY, LOCK & SECURITY SYSTEM Replacement > (BRM) body repair > Replacement Operations

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