on my 2010 bmw x5 3.0 x drive told me today over heat drive moderately. i heard the high speed fan come on the off. they i checked for codes it had 2AAB variable intake system and a 2E84 electric water pump, communication. so i cleared them then let it idle with the ac on. the i got a 2E81 electic water pump, speed difference ,2E84. i have replace the water pump with a dealer one like 8 months ago. them thermostat 3 months ago (i replaced it cause it was suppose to be changed when replacing the water pump.