Retrofits

Blog posts related to Retrofits

Tesla MCU1 and MCU2: main differences

October 12, 2019

Tesla’s Media Control Unit or MCU is the main screen in the car and it determines some of the new features your car can get. Since we have a Model S that we purchased in 2017, we have MCU1. In this blog post, we will try to answer the following questions:

Tesla V10 and MCU 1

October 1, 2019

Last week Tesla started rolling out V10 to its fleet, but there are still quite a few Tesla owners who don’t have it. I’m seeing and getting quite a few questions about what upgrades you get if you have Media Control Unit version 1 (MCU 1), so I decided to summarize what I know in this blog post. If you have unanswered questions, please let me know and I’ll add them here. Here we go.

Past Tesletter articles

Elon estimates Q4 for HW3 retrofits

Elon has said multiple times that they won’t start retrofiting the AP processor to the new FSD computer (also known as HW3) until the software needs it. If you have purchased FSD, it’s possible that you get it this year, since earlier this week Elon said on Twitter that it’s likely going to happen in Q4 this year. Yay!

Read more: Twitter

From issue #67

First (unofficial) MCU1 + HW3

‘Greentheonly’ purchased an HW3 board and installed it himself in his car. After having done it once, he believes he can do it again in under 20 minutes.

Read more: Twitter

From issue #91

Greentheonly performed the first MCU1 to MCU2 retrofit ever

After swapping his AP board a couple of weeks ago, now Greentheonly has replaced his MCU1 with an MCU2. According to his tweets, he only needed the MCU2 (~$1,600 from a junkyard), IC2, and the new tuner; no wiring harness changes were needed. Of course, Greentheonly noticed how MCU2 is much more responsive than MCU1.

Read more: Twitter

From issue #93

MCU retrofit (both via hardware and software)

Elon Musk says it’ll be possible to upgrade MCU both via hardware upgrade, although they wrote software to accelerate rendering on old MCU.

Read more: Twitter.com

From issue #1

MCU1 improvements coming

When asked (again) about an MCU1 upgrade, Elon replied on Twitter that it’s not worth it. That’s probably because he doesn’t have to suffer it, but at least he replied to one of our tweets saying its current problems could be fixed with software optimizations. We hope it happens soon!

Read more: Twitter

From issue #90

Tesla is working on the upgrade for MCU1

It’s been around a year since the first time Elon mentioned that it was possible to retrofit old cars with MCU1 and get MCU2, but every time I’ve asked the service center, they told me this is something that Tesla doesn’t offer. If you have been a subscriber of this newsletter for some time or have been following us on Twitter, you probably know that I own a Model S 75 from Dec 2017. Tesla started shipping MCU2s in the Model X and S in March 2018, so I’m on the bucket of interested people. It’s good to hear that Tesla is actively working on it!

Read more: Twitter

From issue #80

Tesla owner upgrades Autopilot 2.5 to 3.0 Hardware: Cost, results, and more

Afaik this is the first report of Mobile Service performing the Autopilot upgrade from HW2.5 to HW3. Here is the process:

  • Replacement of the computer, one hour and a half
  • Installation of the necessary firmware, two hours
  • Updated the card to the latest software, another hour or an hour and a half

Read more: Teslarati

From issue #86

Unconfirmed: MCU2 required for HW3 upgrade

A handful of owners have reported receiving HW3 upgrades, coincidentally all of them have MCU2. Now the rumor started on Reddit that you need MC2 in order to have HW3, all this based on one owner with MCU1 who had his Autopilot processor replaced and got called to go back to get the change reverted. We don’t know if this is true but let us know if you know more!

REad more: Reddit

From issue #85

Upgrades to MCU1 & AP2 will be available in a few months

According to Elon «There are many diff versions of mcu & autopilot computer & supporting hardware. Cars last so much longer than phones!» I hope we can get our AP retrofit (MCU1 + HW2.5 here 👋) in the next month or two. Since 2019.40.50.1, I feel like I’m starting to miss out on too much cool stuff.

Read more: Twitter

From issue #91