Key fob won't unlock car. I have no other key.

Marvin

• 85242 Answers
• Posted on Oct 16, 2008

SOURCE: key fob will not undo

If you don't have one that works for the vehicle now, you'll have to take it to your local dealer to have it programmed to the vehicle. Some will charge for this, some will do it at no charge.

If you do have a remote that is programmed and working for the vehicle, then the following steps will allow you to program another remote:

1. Enter vehicle and close all doors.

2. Put seatbelt on (or clip it into the buckle) to shut the warning buzzer off.

3. Put key in ignition, turn to run position but don't start it.

4. Press and hold the unlock button on the working key fob and hold for 4 seconds, then also press the panic button.

5. Release both buttons and you should hear a single chime to indicate it is in program mode. You have 30 seconds after the chime to program any additional remotes you want to program.

6. Press and release both the unlock and lock buttons simultaneously on the remote you are programming. You should hear another single chime.

7. Within 4 seconds after hearing the chime, press either lock or unlock button on remote that you are programming.

SOURCE: i have a grand voyager

dont go through all the hassles of removing the door trim just take the terminal off the battery for about a minute then reconect again worked on mine good luck

SOURCE: c240 mercedes key wont turn seems locked

I have a 2001 C240 with the same issue. I removed the positive battery cable from the battery and kept it off for 30 seconds then replaced it. Everything was reset and the key worked.

SOURCE: My Porsche Cayenne S Key fob no longer unlocks the Door

unlock the door then press the lock button on remote and hold down for 20/30 secs.manual does say hold button.....

SOURCE: car key fob not working and locking car

i have a rover 25 and the key fob is not opening the car i could use the key to open it but the alarm will go off and cant stop it without the fob...