I have only had one issue with mine. It kills batteries. I have a 2014 Mahindra 4530 that I bought in December 2015 new from the dealer. It kept draining the battery, so I thought it was because I wasn't running it often enough. However, when I checked the voltage, something was pulling the battery. I took it to the dealer and they kept it for over a month. They called me and said they had it fixed. They said they couldn't really find the problem, but they were pretty sure it was a short somewhere in the instrument panel on the dash, so they replaced the whole instrument panel with a new one. I picked the tractor up and took it back home. It sat for about a month and when I went to use it, the battery was completely dead. I couldn't jump it off and it wouldn't charge. The cells were dead. Thankfully, the battery was still under warranty from O-Reilly's, so I went and swapped it out. The tractor still has something pulling power when it is off. Now I take off the positive lead from the battery when I'm not using it to preserve the battery. I plan on taking it back to the dealer this winter when I'm not needing it. Other than this one issue, the tractor has performed flawlessly and I love it. Just wish we could figure out where the power drain is coming from.
I also have a 1526 that I bought in May of 2016 and I have had absolutely no problems with it. It is a nice little tractor.