Overview Reviews Product Description A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 5.9L cooling system with a Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat! This thermostat is designed as a direct-fit replacement for your aged factory unit. The Mishimoto thermostat has a higher activation temperature (190 degrees Fahrenheit) compared to the factory thermostat (180 degrees Fahrenheit). The higher activation temperature restricts coolant flow longer to allow a quicker engine warm-up, making this thermostat ideal for use in cold climates. As with all our products, this thermostat includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship. Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat MMTS-RAM-94H 1996 Dodge Ram 1500 Base 5.9 Liter 42RE, 1994-1995 Dodge Ram 1500 Base 5.9 Liter 42RH, 1994-1995 Dodge Ram 1500 Base 5.9 Liter 42RH, 1996 Dodge Ram 1500 Base 5.9 Liter 46RE, 1994-1995 Dodge Ram 1500 Base 5.9 Liter 46RH, 1994-1995 Dodge Ram 1500 Base 5.9 Liter 46RH, 1994-1996 Dodge Ram 1500 Base 5.9 Liter NV3500, 1994-1996 Dodge Ram 1500 Base 5.9 Liter NV3500, 1994-1996 Dodge Ram 1500 Base 5.9 Liter NV3500, 1994-1996 Dodge Ram 1500 Base 5.9 Liter NV4500, 1994-1996 Dodge Ram 1500 Base 5.9 Liter NV4500, 1994-1996 Dodge Ram 1500 Base 5.9 Liter NV4500, 1997-1998 Dodge Ram 1500 Laramie 5.9 Liter 42RE, 1997-1998 Dodge Ram 1500 Laramie 5.9 Liter 42RE, 1997-1998 Dodge Ram 1500 Laramie 5.9 Liter 46RE, 1997-1998 Dodge Ram 1500 Laramie 5.9 Liter 46RE, 1997-1998 Dodge Ram 1500 Laramie 5.9 Liter NV3500, 1997-1998 Dodge Ram 1500 Laramie 5.9 Liter NV3500, 1997-1998 Dodge Ram 1500 Laramie 5.9 Liter NV4500, 1997-1998 Dodge Ram 1500 Laramie 5.9 Liter NV4500, 1997-1998 Dodge Ram 1500 Sport 5.9 Liter 42RE, 1997-1998 Dodge Ram 1500 Sport 5.9 Liter 42RE, 1997-1998 Dodge Ram 1500 Sport 5.9 Liter 46RE, 1997-1998 Dodge Ram 1500 Sport 5.9 Liter 46RE, 1997-1998 Dodge Ram 1500 Sport 5.9 Liter NV3500, 1997-1998 Dodge Ram 1500 Sport 5.9 Liter NV3500, 1997-1998 Dodge Ram 1500 Sport 5.9 Liter NV4500, 1997-1998 Dodge Ram 1500 Sport 5.9 Liter NV4500, 1997-1998 Dodge Ram 1500 ST 5.9 Liter 42RE, 1997-1998 Dodge Ram 1500 ST 5.9 Liter 42RE, 1997-1998 Dodge Ram 1500 ST 5.9 Liter 46RE, 1997-1998 Dodge Ram 1500 ST 5.9 Liter 46RE, 1997-1998 Dodge Ram 1500 ST 5.9 Liter NV3500, 1997-1998 Dodge Ram 1500 ST 5.9 Liter NV3500, 1997-1998 Dodge Ram 1500 ST 5.9 Liter NV4500, 1997-1998 Dodge Ram 1500 ST 5.9 Liter NV4500, 1994-1998 Dodge Ram 2500 Base 5.9 Liter 46RE, 1994-1998 Dodge Ram 2500 Base 5.9 Liter 46RE, 1994-1998 Dodge Ram 2500 Base 5.9 Liter 46RE, 1994-1998 Dodge Ram 2500 Base 5.9 Liter 46RE, 1994-1998 Dodge Ram 2500 Base 5.9 Liter 46RE ...See Application Guide for Additional Fitments Product Videos Custom Field Product Reviews Write a Review Write a Review × Mishimoto Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *
Quick view Details Mishimoto | sku: MMTS-RAM-99H Mishimoto Dodge 5.9L/6.7L Cummins High-Temperature Thermostat MSRP: Now: $88.99 Add to Cart Quick view Details Mishimoto | sku: MMTS-RAM-94L Mishimoto Dodge 5.9L Cummins Low-Temperature Thermostat MSRP: Now: $88.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89H Mishimoto 89-93 Dodge 5.9L Cummins 87.5C High-Temperature Thermostat MSRP: Now: $53.95 Out of stock Quick view Details Mishimoto | sku: MMTS-RAM-99L Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat MSRP: Now: $86.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-94BK Mishimoto 94-02 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-03BK Mishimoto 03-07 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: misMMTB-RAM-04 Mishimoto 04.5-09 Dodge Ram 5.9L Cummins Turbo Blanket MSRP: Now: $141.95 Out of stock ×
Quick view Details Mishimoto | sku: MMTS-RAM-94L Mishimoto Dodge 5.9L Cummins Low-Temperature Thermostat MSRP: Now: $88.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89H Mishimoto 89-93 Dodge 5.9L Cummins 87.5C High-Temperature Thermostat MSRP: Now: $53.95 Out of stock Quick view Details Mishimoto | sku: MMTS-RAM-99L Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat MSRP: Now: $86.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-94BK Mishimoto 94-02 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-03BK Mishimoto 03-07 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: misMMTB-RAM-04 Mishimoto 04.5-09 Dodge Ram 5.9L Cummins Turbo Blanket MSRP: Now: $141.95 Out of stock ×
Quick view Details Mishimoto | sku: misMMTS-RAM-89H Mishimoto 89-93 Dodge 5.9L Cummins 87.5C High-Temperature Thermostat MSRP: Now: $53.95 Out of stock Quick view Details Mishimoto | sku: MMTS-RAM-99L Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat MSRP: Now: $86.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-94BK Mishimoto 94-02 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-03BK Mishimoto 03-07 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: misMMTB-RAM-04 Mishimoto 04.5-09 Dodge Ram 5.9L Cummins Turbo Blanket MSRP: Now: $141.95 Out of stock ×
Quick view Details Mishimoto | sku: MMTS-RAM-99L Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat MSRP: Now: $86.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-94BK Mishimoto 94-02 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-03BK Mishimoto 03-07 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: misMMTB-RAM-04 Mishimoto 04.5-09 Dodge Ram 5.9L Cummins Turbo Blanket MSRP: Now: $141.95 Out of stock ×
Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-94BK Mishimoto 94-02 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-03BK Mishimoto 03-07 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: misMMTB-RAM-04 Mishimoto 04.5-09 Dodge Ram 5.9L Cummins Turbo Blanket MSRP: Now: $141.95 Out of stock ×
Quick view Details Mishimoto | sku: MMBK-RAM-94BK Mishimoto 94-02 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: MMBK-RAM-03BK Mishimoto 03-07 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: misMMTB-RAM-04 Mishimoto 04.5-09 Dodge Ram 5.9L Cummins Turbo Blanket MSRP: Now: $141.95 Out of stock ×
Quick view Details Mishimoto | sku: MMBK-RAM-03BK Mishimoto 03-07 Dodge 5.9L Cummins Boot Kit MSRP: Now: $298.99 Add to Cart Quick view Details Mishimoto | sku: misMMTB-RAM-04 Mishimoto 04.5-09 Dodge Ram 5.9L Cummins Turbo Blanket MSRP: Now: $141.95 Out of stock ×
Quick view Details Mishimoto | sku: misMMTB-RAM-04 Mishimoto 04.5-09 Dodge Ram 5.9L Cummins Turbo Blanket MSRP: Now: $141.95 Out of stock