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Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

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Popular Cummins Thermostats

Cummins Thermostat

Diesel Parts Direct has a large selection of genuine and aftermarket thermostats for Cummins diesel engines, including popular 180°F models, all covered by a 12-month warranty.

Our quick links below display our belt-selling items. If you do not see the thermostat you are looking for, call us at 888.687.0539888.687.0539 or use our quote request form: our trained parts specialists will gladly help you.

3055663

THERMOSTAT - KTA38 / QSK38 / QSK45 / QSK50 / QSK60

Genuine Cummins Part

$332.86

Qty:

3800884

THERMOSTAT - B 3.3 / QSB 3.3

Genuine Cummins Part

$117.38

Qty:

3928499

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

Genuine Cummins Part

$94.66

Qty:

Ships in 3-4 days

5284903

THERMOSTAT - 6C8.3 / ISC8.3 / QSC8.3 / QSL9 / ISL9

Genuine Cummins Part

$124.42

Qty:

Ships in 3-4 days

5292738

THERMOSTAT - 6C 8.3 / ISC 8.3 / ISL 9 / QSL 9

Genuine Cummins Part

$93.82

Qty:

Ships in 3-4 days

DS-135675

THERMOSTAT - NH / NT (77DEGC / 170DEGF)

$38.00

Qty:

Ships in 1-2 days

DS-201737

THERMOSTAT - V378 / V504 / V555 / V903 / VT8 / VTA903

$32.94

Qty:

In Stock

DS-204586

THERMOSTAT - NH / KTA19 / L10 / M11 (175DEGF/79DEGC)

$43.33

Qty:

In Stock

DS-3059408

THERMOSTAT - BIG CAM IV (225degF/107degC)

$49.15

Qty:

Ships in 1-2 days

DS-3064454

THERMOSTAT - BIG CAM IV (173degF/78degC)

$26.91

Qty:

In Stock

DS-3064455

THERMOSTAT - BIG CAM (187degF/86degC)

$27.24

Qty:

Ships in 1-2 days

DS-3076489

THERMOSTAT - N14 (180DEGF/82DEGC)

$39.56

Qty:

In Stock

DS-3802273

THERMOSTAT - B (181DEGF/83DEGC)

$35.77

Qty:

Ships in 1-2 days

DS-3802968

THERMOSTAT KIT - 4BT / 6BT (83DEGC / 181DEGF)

$30.91

Qty:

In Stock

DS-3913028

THERMOSTAT - C SERIES

$44.13

Qty:

Ships in 1-2 days

DS-3928499

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

$38.17

Qty:

Ships in 1-2 days

DS-3928639

THERMOSTAT - C (83DEGC / 181DEGF)

$18.43

Qty:

In Stock

DS-3928640

THERMOSTAT - C SERIES (71degC / 160degF)

$36.06

Qty:

In Stock

DS-3940632

THERMOSTAT - C (180DEG/82DEGC)

$33.47

Qty:

Ships in 1-2 days

DS-4973373

THERMOSTAT - N14 (180DEGF/82DEGC )

$43.17

Qty:

Ships in 1-2 days

DS-5292738

THERMOSTAT - 4BT / 6BT (83degC/181degF)

$27.92

Qty:

In Stock

DS-3972071

THERMOSTAT - 6BTA5.9-G3 / B4.5 / B5.9-M220 / 6B5.9 / 4B3.9 (180DEGF / 82DEGC)

Use with DS-3923331 Seal

$30.71

Qty:

In Stock

DS-4318947

THERMOSTAT - ISX / QSX (180degF / 82degC)

$43.17

Qty:

In Stock

Caterpillar® and all of the Caterpillar® engine models listed on this website are registered trademarks of Caterpillar, Inc. Cummins® and all of the Cummins® engine models listed on this website are registered trademarks of Cummins. Detroit Diesel® and all of the Detroit Diesel® engine models listed on this website are registered trademarks of Daimler AG. John Deere® and all of the John Deere® engine models listed on this website are registered trademarks of John Deere. Allison Transmission® and all of their transmission models listed on this website are registered trademarks of Allison Transmission®. Diesel Parts Direct is not an authorized dealer for Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission. None of the parts beginning with "DS" or "R" are genuine Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission items.

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