My watch wont count my steps anymore. I assume this is due to a faulty accelerometer. Can it be replaced or am I looking...

I did it with mine. It's pretty straight forward. After removing the back plat the heart rat monitor is easy to access and remove. Heat the glass from the outside for easy removal. Although be cautious as the small frame for the heart rate monitor can warp (this is what happened to me). Remove the old tape then place the new tape and glass (kinda like tempered glass screen protector) making sure that all the holes line up correctly.