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Switch Point: 110°C Spanner size: 22 HELLA coolant temperature switches monitor coolant levels-if the switch is no longer covered by fluid, a warning light is triggered on the dashboard. Prevents critical engine damage by alerting the driver when coolant levels are too low and engine temperatures begin to rise. Engineered for durability-resistant to vibration, moisture, and dirt for long-term reliability and precise switching performance. Designed for compatibility with OEM systems-check the original part number to ensure proper fitment for your vehicle.