Mazda 6 engine failure after rainwater intrusion causing RPM and speed limitations on Mazda 6

Some Mazda 6 owners report experiencing significant engine problems due to rainwater intrusion, including limitations on RPM and speed. Specifically, engine failure has been noted in the 2004 Mazda 6, often occurring without warning at an average mileage of 98,000 miles. After rain or snow melt, some owners have observed erratic idling, with RPMs fluctuating between 600 and 1100. Additionally, an abnormal ticking noise is commonly reported in Mazda 6 models from 2003 to 2010 and 2014, which can result in rough idling and unstable RPMs. Owners may also notice vibrations and RPM fluctuations while stopped at traffic lights, indicating potential engine issues. Furthermore, attempts to clean the injectors or intake valves have not always resolved the problem, with some cases showing persistence or worsening of the symptoms.