1972-73 California Models Only
See Figure 1
Mazdas built to be sold in California in 1972 and 1973 have an air filter for the air pump. The air pump is used for purposes of emission control; more information on the air pump system can be found in Emission Controls . The filter must be replaced at 24,000 mile intervals.
- Remove the wing nut holding the filter housing cover in place.
- Remove the cover. Remove the old filter and discard it.
- Install the new filter and install the cover. Replace the wing nut and tighten it securely.