The needed firmware is only available to Honda Dealers.... through their internal Honda access via PC.
No. You should not apply updates without a reason in a vehicle.Just spent 5 min to download everything. But the question is Do I need this upgrade if I had no problems?
That's what is surprising. These are fairly modern HU's yet they didn't build in the ability to easily update via USB. My 2011 Jeep GC had an outdated even at the time head unit and to update the F/W you just went to a website, downloaded a file, and when you ran it, it created a jump drive that plugged into the USB port to install the update. My mom even got a USB stick in the mail on two different cars, a 12 Ford Edge and a 14 Jeep GC. I just wish it was easier to update because there seems to be multiple little quarks in the system from the factory that some minor F/W updates should be able to fix without having to waste the dealer's time.That's a tiny update; I guess it just flips some misplaced bit... if only Mitsubishi/Honda would make the latest F/W for the whole unit easily avail. I can live without WiFi updating (and I can totally understand why they don't do it; it's a bleep!-ing security nightmare to lock down properly), but simple USB updates don't seem to be too much to ask. (Bonus points if we could update everything from USB, not just entertainment, using the entertainment unit as a CAN/J2534 gateway.)
If you suffer from the "screen won't dim" problem, the only way to get the fix is to go to the dealer, have them order a new unit from Honda/Mitsubishi, and then Mitsubishi will cancel the order and send a USB stick (with a complete FW package) to the dealer if they successfully notice what problem the dealer is ordering the unit for.