My alarm goes of intermitantly do i need anew door

See if your dome lights work when opening the door. Usually a door latch.

From J.C. Moritz:

"OURCE:VW 2000 New Beetle door sensor/car alarm goes off when doors open.
I found a thread - http://forums.vwvortex.com/zerothread?id=1542461that details the repair of the soldering on the key lock door module. Our 2000 new beetle had the same issue. Also sometimes it refused to start. Soldering pins fixed it all.

Also see http://forums.vwvortex.com/zerothread?id=1015107 for releasing window from track, And door handle from inner panel.

I ripped the door apart and re-solderd the pins. I only had one pin with cracked solder but two others looked thin so I did them while I was in there. It's about a four or five hour project if you have all the tools. (8mm triple square also called an 8mm internal was the hardest to find - Also needed Torx T8 T10 T15 and T30 plus Philips Screw Driver. )
Project is difficult but not too bad for the mechanically inclined. A 7 on a scale of 10.
Since re-soldering pins - no more issues! My guess is that a VW dealer would get $200 for a new moduel plus 5 hours of service time for this gig - easily a $500 to $1000 bill. My cost - several new tools - about $25.00."

Sorry, there's no way for you to do that, unless you have access to a VW scan tool like VCDS. If the alarm is going off, you most likely have a bad driver's door latch and it will need to be replaced to fix your problem.

you need to ask them what they mean by it has to be the door latches? may be a loose wire somewhere on a latch. this is a get in there and look thing.
Best Reguards, Premium FixYa Support

Try disconnecting the negative battery cable for 20 minutes and accessing the door.

I'm not sure if you have an aftermarket or factory alarm, but try this: hook up the battery and try unlocking/locking the door with the key. If you have a remote door lock, hit unlock/lock on that. I have come across a couple of cars this was all it took to stop the alarm, never tried with a VW though. Hope it works, good luck!

Take to dealer. Vehicle needs vag-com to be reprogrammed. Bring all keys with you to dealer.

My 2000 Beetle does same thing (although not all the time). Just found an internet post that suggests there is a problem in the door lock sensor. I assume you are using a regular key - not
the keyless entry - like I am. He also said that you can disable the alarm (also disables the
keyless entry - which doesn't bother me) by leaving the front door AND the rear trunk open and
starting the car up. Seems to work so far. I will get the door lock sensor replaced and turn the
alarm system back on (not sure how yet), and let you know if that stops the problem.

I found a thread - http://forums.vwvortex.com/zerothread?id=1542461 that details the repair of the soldering on the key lock door module. Our 2000 new beetle had the same issue. Also sometimes it refused to start. Soldering pins fixed it all.

Also see http://forums.vwvortex.com/zerothread?id=1015107 for releasing window from track, And door handle from inner panel.

I ripped the door apart and re-solderd the pins. I only had one pin with cracked solder but two others looked thin so I did them while I was in there. It's about a four or five hour project if you have all the tools. (8mm triple square also called an 8mm internal was the hardest to find - Also needed Torx T8 T10 T15 and T30 plus Philips Screw Driver. )
Project is difficult but not too bad for the mechanically inclined. A 7 on a scale of 10.
Since re-soldering pins - no more issues! My guess is that a VW dealer would get $200 for a new moduel plus 5 hours of service time for this gig - easily a $500 to $1000 bill. My cost - several new tools - about $25.00.

the factory fit alarm is not voltage sensing .The best advice is to go to VW garage and get them to read the alarm causes,(they can check the last 4).this will give you a good idea where the fault lies.ie door lock mechanism,interior monitor etc..You cannot start looking for problem until you know alarm cause..