Generic Thermostat Picture
Generic Thermostat Picture
BRAND: Cummins | SKU: Cummins 145977

USA Cummins 145977 5.9L Thermostat

$199.00 $209.99 $209.99 /
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Maintaining your engine’s optimal operating temperature is essential. Before purchasing, please verify compatibility by checking your engine serial or part number to ensure the correct fit.

Product Overview

The Cummins 145977 Thermostat is an OEM replacement designed specifically for Cummins B Series 5.9 engines found in Dodge/Cummins ISB 5.9L 24V applications from 2003 to 2007. This thermostat helps regulate coolant flow so that your engine consistently reaches its proper operating temperature while minimizing abrupt coolant cycling. Made in the USA, it represents precision, reliability, and durability. For more quality parts, visit our Cummins OEM Replacement Parts collection.

Key Features & Benefits

  • OEM quality with a full manufacturer’s warranty
  • Precisely calibrated for standard operating temperatures
  • Engineered for Dodge/Cummins ISB 5.9L 24V engines (Cummins B Series 5.9)
  • Easy installation to reduce downtime

Specifications

  • Part Number: 145977
  • Manufacturer: Cummins
  • By KLM Performance
  • Engine Compatibility: ISB 5.9L 24V (Cummins B Series 5.9)
  • Year Range: 2003–2007

A malfunctioning thermostat can cause your engine to overheat or run too cool, negatively impacting performance and longevity. Replace faulty components promptly with this precision-engineered thermostat to keep your engine running at peak performance.

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Customer Reviews

Based on 1 review
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B
Bruce G
Improved Engine Efficiency

This thermostat made a noticeable difference in my 2007 Cummins B Series engine. It runs smoother, and I've seen a boost in fuel efficiency. Great purchase!

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