I had months of having the intermittent issue of turning key multiple times to get engine to crank over(felt like weak battery or engine caught on tdc). After 3 batteries and 2 trips to dealer and no luck fixing issue I ended up getting used starter off Ebay. Starter came off of a 2015 ace 570 part #4013015 made by mitsuba. My stock starter was part#4014909 made by Lucas-tvs. The new mitsuba starter cranks waaay harder and faster than my stock Lucas ever did. So far I have not had any problems with engine cranking over. I’m not saying one starter is better than the other in all cases , but my stock Lucas-tvs was a dud. Hopes this helps others having similar issues.