I just bought a 2000 beetle turbo ,it has 70,000 miles on it the person which I bought it from has kept really good care of the car ,what should I consider doing to it maintance wise , since it just turned 70,000 miles .what should I do if anything .

Question partially edited for clarity, but do you mean

'2000 Volkswagen Beetle 1.8 turbo. Sensor locators', like where is the *location* of every sensor? Or do you only want sensors that are involved with the turbo?

https://www.google.com/search?q=2000+Volkswagen+Beetle+1.8+turbo+sensor+locators

https://www.google.com/search?q=2000+Volkswagen+Beetle+1.8+turbo+sensor+locations

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usually belt needs to be replaced look and check [with engine off] ur belt for fray cracks or any damage to belt and replace

Do you have the turbo model? If so you could have a bad turbo. You may also have bad valve seals or piston rings. If you have a turbo you can remove the hose or pipe off of the outlet side of your turbo between the turbo and the intake manifold. If there is oil in it your turbo is leaking and will need repaired.

The most problematic engine issue is replacement of the timing belt, tension pully and water pump at around 70,000 miles. Failure of the timing belt can damage and possibly ruin the engine. Other common problems are low or sludged oil (if not changed intermittantly), loss of engine coolant, and bad glow plugs.

MAKE SURE YOUR ENGINE IS WELL TUNED. MAKE SURE TURBO IS WORKING NO RESTRICTED EXHAUST..ALL PLUGS AND WIRES ARE GOOD.SOUND LIKE TRANSMISSION SLIPPING.HAVE TRANSMISSION PRESSURE TESTED.IF FLUID LEVEL GOOD AND TRANSMISSION FILTER NOT STOPPED UP.PROBLEM COULD BE TRANSMISSION SHIFT VALVES OR TRANSMISSION PUMP OUT PUT PRESSURE TOO LOW.

That's a rule of thumb every 60K mi you need to replace the belt even though it looks fine.

yes !

Not normal. Is your Beetle turbo?

70,000 miles is normal and $1000.00 at VW too try taking it to a reliable small import repair shop....No your car isnt going down....normal wear and tear

try an air flow meter