Systems, methods, and computer-readable media are disclosed. An example coolant system can be configured in an autonomous vehicle. The system can include a first coolant loop configured with a first series of coolant hoses to communicate a first volume of coolant fluid between a first reservoir, a first coolant pump, a three-way heat exchanger, and a computer system heat exchanger and a second coolant loop configured with a second series of coolant hoses to communicate a second volume of coolant fluid between a second reservoir, a second coolant pump, the three way heat exchanger, and the computer system heat exchanger. The system can further include a third coolant loop configured with a third series of coolant hoses to communicate third volume of coolant fluid between the three-way heat exchanger and an engine heat exchanger of the vehicle.