Two problems related to starter solenoid have been reported for the 2005 Saturn ION. The most recently reported issues are listed below.
Brake transmission shift interlock (btsi) solenoid. The key would get stuck in ignition and not release, or I would be unable to turn the car on after inserting the key. Note: a couple of times I could not turn off the car, which is a safety hazard. I had to force the key to turn the ignition cylinder to the off postition over several minutes. I have replaced ignition switch 3 times and ignition housing twice since buying my Saturn Ion new in 2005. Therefore, I am now on my fourth ignition switch since the car was manufactured. I acknowledge that ignition switches have been found defective in certain gm car models and years and a recall is in place. However, I believe that ignition problems in gm Saturn Ions are additionally complicated by btsi solenoid and switch failure. In addition to replacing the ignition switch and housing, I have also had to replace the btsi solenoid and switch twice (may 2010, 50,263 mi; Feb 2013, 84,715 mi) due to the part's failure in order to fully address the ignition switch problems of my Saturn Ion. Please investigate the additional issue of btsi solenoid and switch failure as being a contributing factor in the overall ignition saftey problems of gm Saturn Ions.
I have a 2005 Saturn Ion and key want release from ignition and sometimes will not start. Car was taken to Saturn and ignition solenoid, gear shift housing unit, another key was made, security system was reset and car was recalibrated. Saturn told me this was what was needed to fix problem and problem still not fixed. I have been reading up on complaints about Ion owners and a lot of people have the same problem. I am upset and frustrated I have two kids and have already spent $1000 to repair and replace parts that obviously didn't need to be replaced because problem still exists. I need help this is out of control. As far as problem with car not starting, the problem happens intermittently. Saturn tested alternator and battery and checked starter everything checked out. Hopefully car not starting is fixed but it happens intermittently and I know I have been stranded in the cold a few times with my children till the car decided too start.