MTC 1033 61 31 1 375 715 Coolant Sensor Review

My BMW E28 535i 86 coolant indicator light came on. Simply swapped and done. My coolant was full so I knew the sensor was bad. If you see brown goo at the end of the sensor, it's time to replace it and flush the system. Yuck.Update on 06/02/2015: This sensor failed after less than a year. My overhead computer flashes the coolant level warning light intermittently, but when checked, the coolant level is perfectly fine. I am updating my original 5 star rating to 3 stars.