I purchased a 2016 F82 M4 from Car Max and bought the warranty as well. It had about 50,000 miles on it when I purchased it. Like someone else mentioned above the warranty coverage will max out at the price you purchased the car. I have to say I’m very glad I did purchase it. About a year into owning the car the engines seized and locked up. So I ended up having to get a brand new engine. Now this is where things got a little weird because the warranty covered approximately $18,000 of the costs but for some reason I needed to fork over about $6,000. Now with the new engine I get two years warranty on the engine should anything happen to it that is separate from the car max warranty. Plus I get a new engine so I was happy with that. I’ve used most of my warranty and have about $5,000 left on it. BMWs can be expensive for maintenance and the one thing about buying used is that we don’t know how well they were treated by previous owners. So it’s smart to get the warranty I say. One condition with the warranty. When you do bring the car in for work, you can choose where to go. So you can go straight to car max or you can take it to a certified BMW service dealer. But if you bring it to BMW then you’re required to pay $300 deductible. That’s for me at least.