I put a new battery in the car and now the radio does not work. I do not know the 4 digit code since it was my dad's car and he has since passed.

do you know the 4 digit code, if you do then put the code in , follow the directions in your owners manual. If you know it you need to go to a GM dealer to have them to do it and it's not cheap .

Yes you will need a 4 digit code before it will work, check your vehicle documents to see if it is written down! What make model radio is it?

If factory installed put on radio.The safe sign will appear.There should be a 4 digit code for the radio.Punchin the code using numbers 1-4.Press repeatedly from number 1 till for the fist digit number 2 for the second digit etc.when you have punched the code in the safe sign will appear.Briefly press loud /expert then wait a few seconds your radiio should then display .Look for your favourite channels .If you punch in the code wrong there is a waiting period.First attempt wait 21 seconds ,second attempt1.5 minutes 3rd attempt5.5 minutes...4th attempt22 mins.5th attempt1.5 hrs. If this fails ,disconnect battery and start again

If it is constant cycling beeps it is because it is in factory mode, when the car is new and you input the code it usually cycles beeps through all the speakers one after the other, it takes up to 5 minutes to stop and then will work ok, if it is a beep when you put the code in then the code is wrong, there is a 4 digit pre code on the side of the radio, if you go on renaults web site and put in your chassis number then the pre code, it will give u the code that renault gave that stereo, costs 15 or a dealer can also do it for you.

That 4 digit code is not a serial # it is a 4 digit anti theft code witch is usually set by factory so usually if you have the original manual for car the code should be written in there some where usually

when you are at the -C- display (you may have to wait up to 3 mins) press program button 5.

Use Up or Down buttons for first digit - Press 5 to store
Repeat for digits 2 3 & 4

Job done.

Now, can anyone advise me how to get the stock Cassette/ Radio out of the dash (replacing with CD player)?
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Hi,

I had a similar problem. The speedometer didn't work. This is going to sound a little strange, but, at some point the battery died. When the new battery was put in, all of a sudden the speedometer worked again. Can't explain it, but it's true. Maybe just disconnecting and re-connecting the battery would help you, BUT BE CAREFUL about the radio. When the battery is disconnected (or dies) you have to put the radio code in again to use your radio. Make sure you have the 4-digit radio code before you disconnect the battery. If you enter it 3 times and fail, google what to do then.

Somehere in the owners manual or the supplimentary sound system booklet, you should find a hand written number, it should be about 4 digits long. That is your radio lockout code.

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

As long as that was the original radio installed in this vehicle the code can be retrieved by the dealer for a fee. Take registration and proper Id to dealer and they will be able to get your code back for you. Godd Luck