Radio code Lost the radio code and changed the battery. Now the radio won't work.

this is posted on the internet, like 1 trillion times.
and answered as much.
here are the 4 choice, skip 5 and 6 (danger ways)
this works on all stock radios only.

http://jeepdied.com/pdf%20and%20more/keep-alive.html#radio

Contact a Nissan delaer. They can get it for you.

some cars have security in the radio and if it was turned on when you unhooked the battery the radio probably lost the code. unfortunately you will probably need to take it to a dealer to get the radio unlocked.

You need to have the anti-theft code put in to make the radio work, this happens when the battery power is lost. Call the dealer or go to www.radio-codes.com

It is only available at a Ford Dealership...Give them your VIN Number & they will give you the code...There is a charge for this service...Now, if you lost battery because you changed or disconnected battery you can avoid this happening in the future...Take a 9 volt battery...Remove the snap top from an old smoke detector...Solder the + lead to positive of cigar lighter plug and - lead to negative of cigar lighter plug...snap on 9 volt battery and plug into lighter BEFORE disconnecting car battery...The 9 volt battery will hold radio up while car battery is disconnected...saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

you lost the radio code, the new car came with a card , with this number. and the opr. guide said to write it down (lost opr guide)
so im at 26 posts not on this,, no more, search my 25 posts.
on this, "radio codes"

short answer, dealer time.

If your radio has anti-theft system you will have to go to the dealer and get the accss code to reactivate the radio if you dont have the code already. GM vehicles with anti-theft radios will lock when power is lost to the system if the radio is not turned off prior to battery disconnect or dying.

i have a 2004 jaguar x-type and i replaced my battery and the radio is locked and i dont know the code. i bout the car second hand and the code that the dealership has isnt working. what can i do to get the radio unlocked?

You need to recover the radio's serial number to decode the 4 digit radio key. The full process and decoder is available here: Porsche Boxster: Online Lost Radio Code Recovery Tool

If the battery went dead and you charged it, you need to reboot the system. It has lost them function of radio.
Disconnect both side of the battery and with the battery disconnected, crank the car 3-4 times (This just discharges the computers). Then reconnect the battery cables (pos + first) and you should have a working radio again.