Table 1 shows 16 common power train related problems of the 2004 Saturn ION. The number one most common problem is related to the power train (17 problems). The second most common problem is related to the automatic transmission (13 problems).
1. The ignition switch will not disengage. . . Sometimes after motor is turned off and car is in park the car must be turned back on four or five times before the ignition will engage correctly. The vehicle is stationary. . . In the park position. . . . Key will lock inself and not disengage. Read details...
2004 Saturn Ion with automatic transmission, the car stopped moving in drive while turning onto the freeway. Car was towed to a Saturn dealer which they stated that the transmission is no good. Nothing was done because they want $5,000 to fix the car. Read details...
Transmission failure - shortly after the 2004 Saturn Ion hit 100k miles, the transmission failed. I had to replace the transmission at the dealer for a cost of $4,620. 93. In doing research it appears that failing 2004 Saturn Ion transmissions are widespread around the 100k mile mark. Read details...