Harman & Heatilator Black Wire ESP Thermistor Probe Sensor, 3-20-11744
HHT factory part numbers 3-20-00744, 1-00-00744, and 3-20-11744. The black wire color ESP probe will replace all previous black and white wire ESP probes. Harman & Heatilator Exhaust Thermistor ESP Probe, BLACK WIRE – OEM Quality.