I wish someone had told me this two months ago, so I'm posting here to save some fellow Mustang owners from the same headache. I have a 2017 Mustang GT and my battery died. I went to a local shop, bought a new battery, and installed it myself in about fifteen minutes. Easy, right? Nope. A few days later the battery light came on, then the car started throwing "check charging system" warnings. I took it to a mechanic and he said that modern Mustangs have a Battery Management System (BMS) that learns the battery's age and adjusts the charging rate. When you install a new battery without resetting the BMS, the car still thinks the old battery is installed and overcharges the new one, which can kill it in a few months. He reset the system with his scan tool for 150 dirhams and the warnings went away. Now I know that whenever I replace the battery, I need to either reset the BMS myself using a specific sequence of ignition cycles and pedal presses, or use a scan tool. I've also been looking at mobile services that specialize in this. I found a company offering Veteran Mustang Battery Installation Service By Battery Zone UAE that claims they include the BMS reset as part of their mobile service. Has anyone here used them or a similar mobile service for a Mustang? I'm curious if they actually perform the reset correctly and test the alternator. Also wondering if they use Motorcraft batteries or quality aftermarket. For now I've learned my lesson and won't DIY this again without the proper reset. Any other Mustang owners have tips or experiences to share? Thanks.