WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

When replacing the AV and NAVI control unit, eject the map DVD-ROM before disconnecting the battery.
The AV and NAVI control unit has the following information stored in its memory. Record the memory contents before replacing the control unit and input them in the new unit as necessary.
1. < FM-AM >
  - Preset frequency
  - Area for indicating station, selection of overlapped stations
  - < CD >
  - Program status
2. < Sound quality >
  - Volume balance memory set values
  - Equalizer memory set values
3. < Image quality >
  - Brightness of light when ON/OFF
  - Dimming switching
  - Display color switching
4. < Navigation mode >
  - Latest status (map screen/BIRDVIEW(tm), reduced scale, rotation angle of map screen, route guide ON/OFF, track ON/OFF, etc.)
  - Current position
  - Destination, passing point 1 - 5
  - Registered places, their names, etc.

NOTE: Only removing the battery does not erase the memory.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Precautions For Av And NAVI Control Unit Replacement

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?