Most Cars Use Mechanical Water Pumps Due to Cost, Repair Complexity, and Simpler Design

Most cars still use mechanical water pumps because electric versions add manufacturing costs, are harder to repair, and mechanical pumps have simpler designs that integrate easily with existing engine layouts.

Cost

Electric pumps require advanced electronic controls, increasing development and manufacturing expenses.

Repair Complexity

Failed electric pumps can't be easily fixed due to combined electronic/mechanical components and vulnerability to heat.

Simpler Design

Mechanical pumps have fewer components and integrate directly into existing engine systems without needing separate electric motors.