Vemo V40-99-1103 Engine Coolant Thermostat Kit

Engine Coolant Thermostat Kit for GM Applications

The VEMO V40-99-1103 engine coolant thermostat kit is built for vehicles that use a thermostat integrated with the housing. It opens at 82°C and includes a seal, making it a direct-fit cooling system service part for select Chevrolet, Buick, GMC, and Cadillac models.

Compatible With 2013-2021 Chevrolet Malibu, 2014-2015 Chevrolet Impala, 2016-2017 Chevrolet Camaro, and other listed GM applications, this thermostat kit is identified by OE references including 12651603 and 25201447. The VEMO line focuses on application-specific cooling components for OE-style replacement needs.

Key Features

• Part number: V40-99-1103
• Engine coolant thermostat kit with housing
• Opening temperature: 82°C
• Includes seal for housing service
• Dimensions: 120 mm length, 100 mm width, 98 mm height
• Fits select Buick, Cadillac, Chevrolet, and GMC vehicles
• Cross-references OE-style part numbers 12651603 and 25201447

Detailed Description

The VEMO V40-99-1103 thermostat kit is designed for cooling system repair where the thermostat and housing are serviced together. Its 82°C opening temperature supports proper coolant flow regulation once the engine reaches operating temperature, helping maintain stable temperature control in the cooling circuit. This part number is listed for a wide range of GM vehicles, including Chevrolet Malibu, Chevrolet Camaro, Chevrolet Impala, Buick Envision, GMC Acadia, and Cadillac CTS applications. If you are replacing a thermostat housing assembly on a GM vehicle and need an OE-referenced solution, V40-99-1103 is a relevant match for the listed fitments.

This part cross-references OE numbers 12651603 and 25201447 for the same application.

What It Helps Address

• Engine running too cool or too warm due to thermostat control issues
• Coolant leaks at the thermostat housing or seal area
• Temperature fluctuation from a worn thermostat assembly
• Cooling system service on vehicles that use a housing-mounted thermostat
• Replacement needs tied to OE number 12651603 or 25201447

Installation Notes and Tips

Confirm the OE number on the original housing before ordering, especially on GM platforms with multiple cooling system variants. Inspect the mating surfaces, coolant passages, and seal area during installation, and refill the cooling system with the correct coolant specification after service. Verify that the thermostat housing orientation matches the removed part before final assembly.

Quality Assurance

VEMO supplies application-specific aftermarket cooling components for European and North American vehicle coverage. This thermostat kit is cataloged with exact dimensions, opening temperature, and OE reference data to support accurate parts matching for the listed Chevrolet, Buick, GMC, and Cadillac applications.