VW Engine Coolant Thermostat Seal - Mahle/Behr 07K121119A

Product Information

A thermostat gasket is a sealing gasket located between the thermostat housing and the engine block. Its primary role is to create a tight seal that prevents coolant from leaking out of the thermostat housing, ensuring that coolant circulates properly between the engine and the radiator. The gasket is usually made from rubber, silicone, or paper-like materials and is designed to withstand the heat and pressure of the engine's cooling system.

• Coolant Leaks: The most common symptom of a failing thermostat gasket is a coolant leak. If the gasket becomes worn, cracked, or damaged, coolant may start to leak from around the thermostat housing, leading to visible coolant puddles under the vehicle or around the engine.
• Engine Overheating: A faulty thermostat gasket can cause coolant loss, leading to reduced coolant levels and overheating of the engine. The engine temperature may rise above normal operating levels, and if the leak is severe enough, the vehicle may overheat, potentially causing serious engine damage.
• Erratic Temperature Readings: A leaking thermostat gasket may cause the engine’s temperature to fluctuate. In some cases, the coolant may escape too quickly for the system to regulate engine temperature efficiently, leading to sudden changes in the temperature gauge reading.

About Mahle Behr

Mahle Behr GmbH & Co. KG is a German corporation active in the automobile industry, headquartered in Stuttgart-Feuerbach. It is a specialist for automotive air conditioning and engine cooling systems. Mahle began in 1920 when pistons made of heavy gray cast iron were being used in internal combustion engines for automobiles and there was a need for a new design. The Mahle brothers countered this trend by producing light-alloy pistons at their small, newly established company however the technology was still finicky and problems come up frequently. They soon determined that they needed to come up with a solution to keep dirt and dust out of the engine so they eventually developed air and oil filters as well. Their perseverance paid off and the light-alloy pistons began to take over the market. Today, half of all automobiles produced worldwide contain MAHLE components. MAHLE offers an extensive range of parts for everyone including pistons, cylinder liners, piston ring sets, bearings, assemblies, valves, valve train components, and air, oil, fuel, and cabin air filters. Their catalog and online database of aftermarket engine components is an indispensable reference.In early 2016, Stuttgart-based MAHLE GmbH increased its holding in the Behr Group from 36.85 percent to approximately 51 percent with the acquisition of all shares in the BWK GmbH holding company. The company now goes by Mahle-Behr.