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Where did you get the serial number?
If you have all the owners booklets you might find the code on the first page of the service history booklet.
That would be the right place.
I came up with a 5 digit code but it should be 4
Try 2124 and let me know if it works.
Can you try this to get the serial number from the display for me?
1. Enter the navigation diagnostic mode by pressing and holding the Menu, Map/Guide, and Cancel buttons at the
2. From the Select Diagnosis items screen, select Detailed Information & Settings, then select Unit Check,
then select Navi ECU or ECU Info
You need to hold the 3 buttons for 5-10 seconds before it goes into diagnostics
That should work. I take it you did not have the service history booklet either.
Can you double check the numbers on the navigation unit for me?