Oh ya the factory one was actually all corroded so i replaced it the other day when trying to diagnose what was going on! Pretty sure its the auto zone alternator being a bitch cuz every once in a while after driving a long distance it comes up saying check charge system and alternator and battery are both new and all the connections are solid so assume its under or over charging thats happening! Last time it happened to me in case it was undercharging i turned ac off and drove right up the street to auto zone but everything tested fine for them but the car had been shut off between the warning and test cuz they hook computer up while car is turned off so could also be why it no longer showed warning by that time!