I recently bought a used 2017 Model S 100D from Tesla. My pre-purchase research turned up the eMMC recall but not MCU1 vs. MCU2. I assumed that a vehicle I bought from Tesla would have the recall work already completed, but I’m seeing symptoms that some have reported associated with a failing eMMC. Namely, intermittent connectivity failures, screen lockups and spontaneous reboots. I have confirmed that my car has MCU1. I’ve had one service appointment based on Bluetooth flakiness that had minimal effect. I’m trying to figure out if I should schedule more service or just bite the bullet and pay for the upgrade. Advice appreciated.
Yep. It gets rid of all that. I have a 2014 Model S 60 and I had my MCU upgraded to MCU2 back in April and it's SO much better. With labor, it came to $1,880.00 USD. They also replace the binnacle behind the steering wheel (mine leaked goo all over my floor). It only took them about 4 hours to do the installation, firmware update and transfer of favorites. Before my upgrade, I was having all the quirky issues you are experiencing. The steering wheel binnacle freezing up, the main touch screen repeatedly being 'unresponsive', and not having Internet connectivity were the worst for me.
An added bonus of the upgrade, the Navigation now gives you the ability to add way stops and you can edit the order of the way stops you add. You also get lots of new video games. My son (12 years old) and I like playing "SkyForce Reloaded". We bought an XBox game controller a year ago, not realizing it was incompatible with MCU1. So, we held on to it, and lo and behold, it works with MCU2.
All I need now is an option to sort my favorite destinations in alphabetical order (in addition to the already present chronological order).
So yes, 'bite the bullet'. I "kicked the can down" the road for over a year since February 2022. 3G being discontinued was what triggered by desire to upgrade and then saving up the money and finding the time to drive the car to the Tesla Service Center, was the primary delay.
On YouTube, there are also lots of testimonials from other Model S owners who upgraded.
Enjoy!
- James