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MCU Hardware Revisons

apacheguy

S Sig #255
Oct 21, 2012
5,119
1,308
So Cal
Had my MCU replaced at Van Nuys SvC. Service invoice states the unit as being a Rev. M (1004777-00-M). Anyone know what's been changed since Rev. A?

My guess would be lots of small things, but with the IC, one of the hardware revs beefed up the panel resolution. I'm wondering if anyone has discovered something similar with the MCU.
 

pgiralt

Active Member
Supporting Member
Jun 16, 2013
1,521
157
Cary, NC
When you say MCU are you referring to the instrument cluster or the 17"? I'm assuming you're referring to the 17" in which case the resolution on that has not been changed. Only the instrument cluster display was upgraded to higher resolution.
 

Lump

Active Member
Mar 31, 2013
2,618
2,632
So. Cal.
Not aware of any changes, mine was replaced in July.
Screen Shot 2015-10-06 at 6.21.08 PM.png
 

apacheguy

S Sig #255
Oct 21, 2012
5,119
1,308
So Cal
When you say MCU are you referring to the instrument cluster or the 17"? I'm assuming you're referring to the 17" in which case the resolution on that has not been changed. Only the instrument cluster display was upgraded to higher resolution.

Correct. But there clearly have been other under the hood changes which some may be privy to. Thinking @Ingineer or others that have spent time tearing apart their cars.
 

apacheguy

S Sig #255
Oct 21, 2012
5,119
1,308
So Cal
FWIW, the IHS tear down indicates that 2013 models shipped with Rev C units:

Teardown Tesla 2013 Model S Premium Media Control Unit 100477700C - IHS Technology

They've gone thru quite a few hardware revs in only 3 years of production. The DUs are up by a similar count, but they've had far more issues so this is expected.

---updated---

Dig some digging and noticed that the MCU now apparently has a Tegra 4 chip whereas in 2013 it had a Tegra 3. So there's something interesting.

Hacking a Tesla Model S: What we found and what we learned | Lookout Blog
 
Last edited:

FredTMC

Model S VIN #4925
Dec 26, 2012
3,492
3,792
Orange County CA
Had my MCU replaced at Van Nuys SvC. Service invoice states the unit as being a Rev. M (1004777-00-M). Anyone know what's been changed since Rev. A?

My guess would be lots of small things, but with the IC, one of the hardware revs beefed up the panel resolution. I'm wondering if anyone has discovered something similar with the MCU.

i can't imagine they made you pay for replacement... Right? Must be 'goodwill'
 
I got my 70D in June. I not very tech savvy so I will ask you all.....considering how fast technology moves what kind of comfort should we have in our MCU? How long before it will need to be changed out?? Considering you get the newest phone, in a couple months it is outdated..... I heard it costs about 5,000 but that was a few years ago.

Thoughts??
 
Never bought the Model S because it was the latest and greatest, just wondering how long before the main computer system in the car would not work nearly as well.
This is not talked about, the battery degradation is, so does anybody have any thoughts on years before new major computer systems would need to be replaced.
I love our 70D, I love Tesla and the movement it has shifted the energy and transportation industry in. Thanks to all those in the field working hard.
 

Ingineer

Electrical Engineer
Aug 8, 2012
1,507
3,714
They build the MCU modular, so that the cellular modem and the processor/GPU could be changed in the field. They already offer a $500 LTE upgrade. If they decide there just isn't enough processing grunt left, they can design a new CPU board without redesigning the whole system.
 
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Reactions: davidc18

mspohr

Well-Known Member
Jul 27, 2014
10,976
14,043
California
Never bought the Model S because it was the latest and greatest, just wondering how long before the main computer system in the car would not work nearly as well.
This is not talked about, the battery degradation is, so does anybody have any thoughts on years before new major computer systems would need to be replaced.
I love our 70D, I love Tesla and the movement it has shifted the energy and transportation industry in. Thanks to all those in the field working hard.
Computer systems do not "degrade" like batteries. They tend to work forever and at the same speed. If it works now, it will work forever.
 

zambono

Active Member
Mar 1, 2016
1,163
749
DC
FWIW, the IHS tear down indicates that 2013 models shipped with Rev C units:

Teardown Tesla 2013 Model S Premium Media Control Unit 100477700C - IHS Technology

They've gone thru quite a few hardware revs in only 3 years of production. The DUs are up by a similar count, but they've had far more issues so this is expected.

---updated---

Dig some digging and noticed that the MCU now apparently has a Tegra 4 chip whereas in 2013 it had a Tegra 3. So there's something interesting.

Hacking a Tesla Model S: What we found and what we learned | Lookout Blog

Glad to hear it had Tegra 4 then, this should help if they ever get the phone mirroring or other phone integration.
 

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