On eBay Now...

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
This aftermarket replacement thermostat is intended for Cummins ISB6.7 applications and is supplied with an O-ring. It references part numbers 4929643, 3974371, and 5292712, while the 190°F rating identifies the thermostat temperature specification; a thermostat regulates coolant flow as engine temperature changes.
Key Features & PerformanceQ: What does a thermostat do in an engine cooling system? A: A thermostat regulates coolant flow as the engine reaches and maintains its normal operating temperature.
Q: How should fitment be verified? A: Compare the existing complete part number, including 4929643, 3974371, or 5292712 where applicable, with the complete Cummins ISB6.7 application designation before purchase.
This is an aftermarket replacement part and is not represented as genuine or original equipment. Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number, model year, or existing part number. Verify fitment before purchase.

5292712 190°F Thermostat w/ O-Ring for Cummins ISB6.7 4929643 4929644
$46.19
4929643 3974371 5292712 190°F Thermostat w/ O-Ring for Cummins ISB6.7
$46.19
5292712 190°F Thermostat w/ O-Ring for for Cummins 4929644 4929643 3974371
$46.19
![]()
Popular Tutorials
Alarms and Indicator Circuit diagrams