I recently tried to connect my iPhone to the built in bluetooth on a Range Rover Sport and whilst the phone could see the car’s bluetooth and start pairing I was being prompted for a PIN number which I didn’t know.
On iDrive equipped BMW’s you pick your own code to enter on the phone, say 1234 and then the car asks you to confirm this code on the iDrive.
On much older Nokia car kits the code was written on a sticker on the hardware so you had to make note of it but all the recent Nokia kits just use 0000 as the code.
I tried 1234, 0000 and some other defaults to connect my phone to the Range Rover Bluetooth and it didn’t accept them. I have since discovered (in the manual but obviously couldn’t check this easily) that the bluetooth PIN for all Range Rovers and Land Rovers is 2121.
[This blog entry is merely a reminder for me of the PIN for the future but it may come in useful to others]