DS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel Engines
DS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel Engines - view 2
DS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel Engines - view 3
DS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel Engines - view 4
Diesel Parts Direct logo
Roll over image to zoom in Click on image to zoom
DS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel EnginesDS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel Engines - view 2DS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel Engines - view 3DS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel Engines - view 4Diesel Parts Direct logo

Aftermarket parts may appear slightly different, including the packaging.

Cummins4BT / 6BTOther Parts

DS-3972071 Thermostat For Cummins 6BTA5.9-G3, B4.5, And B5.9-M220 Diesel Engines

(Compatible With 6B5.9 And 4B3.9 Model Engines, 180 Deg F / 82 Deg C)

Use with DS-3923331 Seal

OEM #: 3972071SKU: DS3972071

In Stock

$34.78

Taxes and Shipping are calculated at checkout

Hassle Free Return

Look no further than Diesel Parts Direct for thermostats for Cummins 4BT and 6BT engines. Regulating coolant flow and temperature is critical for the successful operation of Cummins 4BT and 6BT engines. Malfunctioning thermostats can lead to the overheating of your engine, so when you need to replace your 3.9 or 5.9 Cummins thermostat, we’ve got you covered.

From genuine Cummins thermostats to aftermarket replacements like the DS-3972071, we stock them all, with many available to ship the same day of purchase.

Keep your Cummins B Series engines operating at peak performance with thermostats from Diesel Parts Direct.

SKU DS3972071
OEM Number 3972071
Part Type Miscellaneous
OEM Brand CUMMINS
  • DS-3915908
  • DS-3917324

Aftermarket warranty

View full warranty details
  • Orders are processed the same or next business day
  • Expedited shipping options available at Checkout
  • If same-day shipping is critical, please call to confirm availability

View full shipping policy

Call any of our friendly Parts Dept. Specialists with your engine serial number, and we can quickly verify whether this part is the correct part for your engine — no guesswork.

Phone: 888.687.0539

Don't know how to find your engine serial number? Go to our Engine Help Center for assistance.

Frequently bought together

Cummins 3921926 Turbocharger GasketCummins 3921926 Turbocharger Gasket - view 2
CUMMINS Cummins 3921926 Turbocharger Gasket
From $25.72
Ships in 4-5 days
Choose options
Diesel Parts Direct logo
CUMMINS DS-3901448 Exhaust Manifold Bolt For Cummins B Series And C Series Diesel Engines
$3.51
Ships in 1-2 days
Fleetguard logo
FLEETGUARD DS-3931063 Oil Filter For Cummins Diesel Engines
$27.28
Ships in 1-2 days
Diesel Parts Direct logo
CATERPILLAR DS-3802290 Turbocharger For Cummins Engines
From $1,060.24
Ships in 1-2 days
Choose options
Diesel Parts Direct logo
CUMMINS DS-3286278 Water Pump Kit For Cummins B Series And ISB Series Diesel Engines
From $132.41
In Stock
Choose options
Cummins 3923331 Gasket,Thm Housing Cover For Diesel EnginesDiesel Parts Direct logo
CUMMINS Cummins 3923331 Gasket,Thm Housing Cover For Diesel Engines
From $5.36
Ships in 4-5 days
Choose options
Cummins 3963983 Sealing Washer For ISC8.3 And QSC8.3 Diesel EnginesCummins 3963983 Sealing Washer For ISC8.3 And QSC8.3 Diesel Engines - view 2
CUMMINS Cummins 3963983 Sealing Washer For ISC8.3 And QSC8.3 Diesel Engines
From $1.51
Ships in 4-5 days
Choose options
Diesel Parts Direct logo
CUMMINS DS-3900276 Intake And Exhaust Valve Spring For Cummins 6B5.9 And 4B3.9 Diesel Engines
$5.84
Ships in 1-2 days
Diesel Parts Direct logo
CUMMINS Cummins 3921557 Oil Cooler Core For Diesel Engines
From $128.97
Choose options
Diesel Parts Direct logo
CUMMINS Cummins 3975629 Heater,Engine For Diesel Engines
$173.03
Special Order