The battery in my VW key fob is dead, now I cant start the engine

USA car,not told and matters huge.(out side USA are different cars()
check fuses
scan the car, using OBD2 scan tool.
only have 1 key
only have 2 FOB
car came new with 2, lost second set< never have just 1.
does car have IMMO ?

If it aftermarket, remove it.

General:open the door with the key.If no key availabile,learn how to pick a lock.If the lock is taped,there are several ways to brake into the car.Hint:less invasive,jack the car from under the engine try to open the hood or inject power into conectors.

change battery in key fob

you should still be able to use the keys to open the car. if you use a remote fob regularly then it is possible that the locks have seized up due to lack of use. spray the locks with a penetrating lubricant spray and leave them for a while before trying the keys again. you may have to do this quite a few times to free the locks. once free, the locks should be sprayed and opened and closed using the key at least every month to prevent them sticking again.

there is a way to get power to the car to use the remote fob on the central locking.
using jump leads or a battery booster pack, you have to go underneath the car and connect the +ve (red) jump lead to the thick wire (10mm approx) coming from the started solenoid to the battery. do this BEFORE connecting the -ve (black) lead to a good earth point under the car.
as the thick wire from the starter solenoid goes directly to the battery, the effect will be the same as connecting jump leads to the battery itself. this should give you enough power to operate the key fob and open the doors.

try this and contact us again if there are any further problems arising from the dead battery.

If im not mistaken,your car should have an alarm reset/override.Below the steering column,on the dash should be a slot where you put your remote transmitter to deactivate the alarm.If that works,you then need to have your remote checked and coded by a vw dealer.Good luck.

You probably caused a short circuit when you changed the light. Change fuse #14. Next time, don't turn the lights on until you are finished changing the lights.

just unplug the immobiliser unit. its behind the glove compartment for rhd models.

No problem. The key fob is two pieces. The key part and the remote. Open the key as you would to sue it. Where the key flips open you can see a small recess about where the line of the trunck switch. This is where the key separates. You can pull it off or pry it with a small screwdriver. Once separated with remote part in your hand this also splits in 2. In the same area you split the key off insert the screwdriver in this recess and the fob will open giving you access to the battery. Also can be done by hand. It is a little tight so you will have to force which is normal. No screws just clipped. Make sure the battery is positioned in the right way and that you have 3 volts when you test the battery. 2.7 volts will make the remote not work or act funny.

Pry open with a table knife at the bottom