Spectra Premium 94521 HVAC Heater Core. Four Seasons 94521. Interchanges: 1562580, 9010166, 1200, 9005, 3263, 279342, 9005, 938242, 9005, 2393, H2393, 2423, E0TZ18476A, E3TZ18476H, 94521, 702423, 279342, 6603263, 399005, 98521, 98521, 399005, 90050, 399005, HT399005, HT399005C, 399005, 9005.
