Chosen Solution
The rubber belt that connects the motor to the rear left wheel has started to tear and it needs to be replaced. Is there a way that I can fix it myself or is this a major fix?
Figured it should be easy, so I looked it up. Google boosted mini s belt replacement and a video should pop up. Looks very easy, and quick. Order a new belt, remove the wheel and belt, put new belt on wheel, and put back on, sliding belt onto motor gear when you do.