This temperature sensor, part number 022 906 041A, gives reading to the fuel injection system to help control the mixture. It threads into the cylinder head on a 74-83 air-cooled Type 2 Bus or Vanagon. It fits 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982 and 1983 models.