Genuine Nissan Replacement Battery Fuse Link
Designed to fail and save the vehicle electronics with alternator/battery failure, but also become weakened with engine runtime, age and electrical stress &/or disruptions can cause these links to prematurely fail, leaving the vehicle immobilized.
Always handy to keep a spare or good preventive maintenance to replace.
*1 required per vehicle, Main Battery Fusible link located in Fuse Block located near brake master