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Our office is closed on Friday March 29th.

Our office is closed on Friday March 29th.

Cummins ISB and QSB Thermostats

Cummins ISB/QSB Thermostat

We sell thermostats for Cummins ISB and QSB engines. You can easily access our inventory by visiting the product links listed below.

If you do not see the part you are looking for, please use our quote request form or call us at 855.470.3525: our knowledgeable sales staff will gladly help you.


THERMOSTAT - B 3.3 / QSB 3.3

Genuine Cummins Part

$93.19

THERMOSTAT - 4B 3.9 / 6B 5.9 / ISB 6.7 / QSB

Genuine Cummins Part

$82.63

THERMOSTAT (83degC / 181degF)

Genuine Cummins Part

$82.41

THERMOSTAT - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$88.15

THERMOSTAT - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$80.69

THERMOSTAT - ISB / C SERIES

Genuine Cummins Part

$53.78

THERMOSTAT

Genuine Cummins Part

$88.15

THERMOSTAT - ISB / QSB

Genuine Cummins Part

$68.36

THERMOSTAT - 4B 3.9 / 6B 5.9 / ISB 6.7 / QSB

$38.17

THERMOSTAT KIT - 4B3.9 / 6B5.9 / ISB / ISD

$26.01

THERMOSTAT (180degF/82degC )

$43.17