Not all Tesla cars can receive all the latest features and improvements released via software updates, availability also depends on the hardware version. Tesla cars have two main pieces of hardware: the Autopilot hardware and the Media Control Unit (touchscreen).

Current retrofits available are:

Blog posts related to Retrofits

Do I need MCU2 to upgrade to Hardware 3 (FSD)?

March 3, 2020

With the Infotainment upgrade available (MCU1 to MCU2 retrofit), Tesla owners with MCU1 who purchased FSD are wondering if MCU2 is going to be required and if they're going to have to pay for it.

MCU1 to MCU2 upgrade is here

March 2, 2020

Tesla's Infotainment upgrade is finally here. Owners of Model and Model X built March 2019 or earlier will be elegible to purchase an Infotainment Upgrade (MCU1 to MCU2 upgrade).

When to expect the Autopilot Hardware 3 (FSD) retrofit

January 31, 2020

If you purchased Full Self-Driving (FSD) and are not on Autopilot Hardware 3 yet, I’m sure you must be wondering when is your retrofit going to be available. Here’s what we know.

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

FSD retrofits and timelines

We’ve been waiting to get the FSD upgrade for a while (Model S, Dec 2017). Tesla recently released a support page that throws some light to frequently asked questions such as, ‘when’s my FSD upgrade going to be available?’.

Also, a very cool video on the enhanced Driving Visualizations that come with FSD.

Read more: Tesla

From issue #104

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

HW3 retrofit will be possible with MCU1

You may have heard rumors that the Hardware 3 (FSD) retrofit is not going to be possible without MCU2. According to Bonnie Norman- well known for having reliable sources at Tesla- the rumors are not true. She has confirmed with Tesla that it is going to be possible. It’s just not available at the moment.

We’ve been in touch with our Service Center and they told us they’re prioritizing Hardware 3 (FSD) + MCU2 upgrade at the moment. No dates shared for Hardware 3 (FSD) +MCU1 yet.

Read more: Twitter

From issue #101

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:

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

MCU1 to MCU2 upgrade is here

The Infotainment upgrade for owners with MCU1 is finally available. We have so many questions… should we pay for the upgrade? When can we get it? Is it required for the Hardware 3 (FSD) upgrade? We have shared everything we know in this article.

Read more: Tesletter

From issue #101

News on HW2 to HW3 retrofits

Greentheonly has discovered there’s been some recent progress in the HW2 to HW3 retrofit, which makes us think it’s actually going to happen. According to him, it’s probably going to be a degraded experience compared to the HW2.5 to HW3 retrofit, and looking at the changes in the latest firmware versions, it seems they don’t plan on changing the radar or the steering rack.

Read more: Twitter

From issue #97

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

Tesla owners shares their experience after getting the MCU2 upgrade

The first folks who purchased FSD + MCU2 are already sharing their experiences after the retrofit. User zanary on TMC Forum with a Model S P100D (AP2.5 and MCU1 before the upgrade) has shared quite a few very interesting details from his experience, check it out! A few highlights:

  • Both the IC and the MCU get replaced (you don’t get to keep MCU1 pieces unless you pay for it)
  • All settings are retained except for wifi connections, Bluetooth, web browser favorites
  • Beeps (like in ‘Joe Mode’) are louder
  • Wifi appears to be faster, needed for a couple of initial things after the upgrade (downloading games and navigation udpate)
  • And our favorite one… «it’s so damn quick. It’s night and day!»

Read more: TMC Forum

From issue #103

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