Two problems related to engine cooling system have been reported for the 1999 Volkswagen Beetle. The most recently reported issues are listed below.
When driving vehicle more than 10 minutes thermostat would overheat. While at a dealership, thermostat sensor that was replaced failed to correct the problem. Also, mechanic indicated that water pump would need to be replaced if the thermostat still overheated.
While in motion, the red engine coolant light illuminated. Consumer checked the coolant reservoir and found it to be empty. The cause, a leaking coolant reservoir cap. The red engine oil pressure light illuminates occasionally. The oil level was extrememly low. Mazdas service manager informed consumer that the new Beetles tends to use oil. The engine control unit failed also. The oil pan has a hole in it which allowed the oil level to continuously be low, therefore allowing the engine oil pressure light to continuously illuminate, also the timing belt and tensioner belt were replaced.