My jetta won't recognize the key

I have had this same issue ever since I purchased the car new in 2000. It seems to be a very intermittent issue, but I found that when it occurred, it was typically damp and between 40 and 50F.

In any case, the dealer was not able to diagnose and fix the problem. I did get them to give me a 4 digit pass code for the immobilizer. This pass code is entered by using the clock adjust knob and the odometer reset button. Once the pass code is entered, the car will start. However, this is not a permanent fix as you may need to enter the pass code again should the immobilizer activate.

Sometimes the Jetta will start after 5-6 trys when the immobilizer is activated, but if I crank anything past 10, I usually resort to the pass code.

I am searching today for solutions since I have needed to use the pass code twice in the last 4 times that I have neede to start the car, and the weather is perfect.

I'm having the same issue, and the service writer I spoke with on Monday had we swap keys since I have two of the remote keys. After I did that, my car stars fine. So it's the other key. It will unlock/lock the car fine and open the trunk, but when I go to use it to start the car, I run into the same problems. I take my car in on wednesday to get a recall problem taken care off and I'm going to talk more with them then to see if they can reprogram my key or something.

I had this same problem and had to take it to the dealership and get a new key and have it programed...$280.00... although you probably will be able to get your current key reprogramed and I thats a lil bit cheaper.