Disassembly And Assembly Of Intelligent Key

WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.

Release the lock knob at the back of the Intelligent Key and remove the mechanical key.
Insert a flat-blade screwdriver (A) wrapped with a close into the slit of the corner and twist it to separate the upper part from the lower part.
CAUTION:
- Be careful not to touch the circuit board or battery terminal.
- The key fob is water-resistant. However, if it does get wet, immediately wipe it dry.
  
  Fig 1: Inserting Flat-Blade Screwdriver Into Slit Of Corner
  Courtesy of NISSAN MOTOR CO., U.S.A.
Replace the battery with new one.
Align the tips of the upper and lower parts, and then push them together until it is securely closed.
CAUTION:
- When replacing battery, be sure to keep dirt, grease, and other foreign materials off the electrode contact area.
- After replacing the battery, check to make sure all Intelligent Key functions work normally.
  
  Fig 2: Aligning Tips Of Upper And Lower Parts
  Courtesy of NISSAN MOTOR CO., U.S.A.