No, it doesn't. CMU needs to be programmed to your car configuration with MDARS. I have my doubts the dealer will do the job for you, but you can always ask. How did you conclude the CMU is at fault? Is your serial number included in the Service Alert?

 

Previously, I went to a dealership for repairs, but they didn’t fix it, and the problem persisted. They suggested I replace the CMU and quoted me 4000, so I didn’t go through with it. I ended up buying one on eBay and installing it myself. I noticed that for others who replaced their CMU, it worked right away, but in my case, after replacing it, I’m getting errors, and it won’t function—only the reverse camera works fine.

 

First time I hear that someone was successful replacing it without programming, It may work somehow if they're manufactured with the same configuration, but the VIN number still the donor CMU.
In my first post I forgot to attach the Service Alert, check if yous it's in the serial number range, if it is contact Mazda Corp and tell them the dealer failed to fix it.

 

My old one was BDTS 66 9c0c. My new one is BDTS 66 9C0M.
The serial No. is in the range, but my car is 2019 mazda3.

 

Honestly I don't really want to go to a dealer to get it fixed, last time I went there it didn't get fixed and I was charged more than $300 CAD, didn't find the cause of the failure, they just suggested to try replacing the mcu and it cost more than $4000 CAD.

 

I used to bought a CMU from japan half cut mazda3 bp.. it does enter restricted mode as yours... and I also tried with MDARS but no idea how to get resolve

 

OP I edited Thread you say MCU, it is CMU, Connectivity Master Unit.

The 'Restrictions' apply to the use of My Mazda App as it was probably configured in either your car or the seconds hand unit you replaced it with.
Plus the cars separate TCU (Telecommunications Control Unit which is VIN Locked) and communicates with MyMazda App and Public Mobile Tower and server....IF you use MMApp as you do not say, I assume the other owner of CMU might have?..again I am assuming it is a USED CMU and not new.

Without going into too much detail as I am not an expert but know a little from reading and other owner experience the MyMazda App has many qualification and settings which can be done by owner, BUT the actual setting up after hardware replacement MUST Be done at Dealer with MDARS as there is a lengthy process with up to 50 possible error codes and Recovery and Passcodes and Registration of Car and or TCU and or Owners Phone App.
It is not a straight forward process, you don't even say of you were using the MMApp as again the use of is not Free forever and is Contracted by the owner in US and I assume in Canada.

Here is MNAO Retail info, again inside Canada you should have the same or similar info freely available.

Connected Service Manual

 

Hi ASH8,
Amazing support you provide here - thanks mate. Can i please get a link to update my 2017 CX5 from 59.00.502 4A N.
Many thanks,
Paul

 

Thanks for the reply, seems like I'll just have to go back to the dealer and try to fix it again.

 

Hi ASH8,
Amazing support you provide here - thanks mate. Can i please get a link to update my 2017 CX5 from 59.00.502 4A N.
Many thanks,
Paul