Glycol Temperature Sensor – 6003198

Battery Coolant (Glycol) Temperature Sensor — Tesla P/N 6003198

This genuine-type battery coolant (glycol) temperature sensor clips around the outlet tube of the Roadster’s battery heat exchanger and monitors coolant temperature as it leaves the pack. The signal is used by the 12 V controller and VMS to regulate pump speed and A/C operation, protecting the ESS from overheating and optimizing charge and discharge performance.

Why these sensors fail

• Age & heat cycling — Continuous exposure to hot glycol and under-hood temperatures can drift the thermistor value out of spec.
• Connector / harness issues — Original connectors can become brittle, corroded, or loose, causing intermittent temperature readings and VMS faults.
• Mechanical damage — The split clamp body can crack if the heat exchanger is serviced without releasing the sensor properly.

Our replacement solution

• Correct Tesla geometry — Clamp body is profiled for the Roadster battery heat-exchanger outlet tube for a positive, rattle-free fit.
• Proper thermistor curve — Electrical characteristics match the original Tesla spec so the 12 V controller and VMS see accurate coolant temperatures.
• Plug-and-play connector — Mates directly with the Roadster harness; no splicing or adapters required.
• Ideal for pump / heater work — Replace this sensor whenever you have the coolant pump, battery heater, or heat exchanger out for service.

Service / installation notes

Always de-energize and safely depressurize the Roadster coolant loop before working around the heat exchanger. Inspect the harness for corrosion or broken conductors before installing the new sensor, and verify coolant level and proper pump operation after reassembly.

Recommended service interval

There is no formal mileage interval, but we recommend proactive inspection or replacement when performing major ESS service, after any isolation-fault event, or whenever cold-weather charging issues are observed.