One problem related to water pump has been reported for the 2019 Acura MDX. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2019 Acura MDX based on all problems reported for the 2019 MDX.
While driving approx. 40 mph and slowing to turn into gas station, the car completely turned off. I was unable to put car in neutral or get off of road. Tow truck called and had to be drug onto flatbed. Garage replaced battery and still unable to start. Needed to replace timing belt, tensioner pulley, water pump, engine short block and heads. Car with only 4088 miles, no s/s of issue prior to incident, etc. Garage not sure what caused issue, best guess is manufacture defect in timing belt. I asked to end lease or for new vehicle, but Acura denied. Car will be returned to me despite my concerns.