My 1999 beetle...

Instructions:
http://www.himohimo.com/search/How+to+change+timing+belt+on+1999+volkswagen+beetle http://www.himohimo.com/1999-volkswagen-new-beetle-gl-timing-belt-removal-installation.html
Parts:
https://www.discountvwparts.net/BeetleParts.html

90,000 miles is pretty ideal to keep your internals young and restless!! rough driving conditions for the car, I'd change it at about 80,000. V-DUB---in your MOMs HOUSE!!!!!! happy driving

low mileage but old ?' difficult decision but not insurmountable ,take the cover off the timing belt and have a look ,if cracking apparant at the base of the teeth then change it if no cracking then leave well alone unless you live in a desert type dry climate ,if so then change it regardless as the plasticiser in the belt dries out

if you have no idea how i would get some one who does it is a tricky job

vw say change belt at 100k,i say to all my customers how much is a new engine ???so 60k is best,its the tensioner that goes first by the way.

60,000 miles. If the belt breaks it will be expensive to fix as it causes engine damage (bent valves).

You should have the timing belt changed between 90-100K miles. When you are having the belt changed you should also change the water pump rollers. The total cast would be $950.00

yes !

If it is running fine, it does'nt need to be timed, but it would be a good idea to have the spark plugs and the fuel filter changed.

Mitsubishi wants the belt changed every 60,000 miles. If there is any doubt, change it.