One problem related to engine knocking noise has been reported for the 2001 Mazda Protege. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Mazda Protege based on all problems reported for the 2001 Protege.
While driving approximately 30 mph driver heard a loud knocking noise coming from the front. The check engine light appeared on the dashboard, and vehicle stalled. The vehicle was taken to the dealer for inspection, and mechanic determined that the engine needed to be replaced.