MG5 Supercharger: FAQ 2 - What upgrades does my MG5 need to use a Tesla charger?

[Jomarkh]

I have a SR pre-facelift MG5. I got a used EVCC from a breaker and swapped it with the factory one. Seemed to work but when I went to do the update, it was blocked as the VIN number on the used part didn't match my car.

There were some companies that claimed they can "virginize" ECU's, allowing you to reuse second hand ones. Phoned around and no one would do it as they "don't do EV's".

Will have to pay £370 to get the EVCC from my local stealer. Hope it fixes it this time. Has anyone else replaced the EVCC on the SR and did it work? Can anyone confirm the part number for the new EVCC required for the fix is correct?

I was quoted about £1k to get my SR done. I now have the LR which works great on Superchargers

 

[adamjs16]

I have now found someone who is willing to try "virginizing" the breaker EVCC but they are not sure if it will work. I will post an update after they have attempted, to let everyone know how it goes.

 

[Jymbob]

Just checked. I'm in the same boat. @adamjs16 and update yet?

 

[adamjs16]

Not got round to sending it off yet as they were closed over christmas. Will be sending it off sometime this week.

 

[adamjs16]

It took him a while to look at it. He has had a look and found the VIN in the memory. He says he should be able to change it. Will let you know what happens once I have tested it myself with a charger.

 

[adamjs16]

I finally got the EEVC back, installed it in the car, and connected SIPS. The update then went through successfully and the car can now charge at Tesla Superchargers.

I’ve also noticed a few improvements since the repair. The 12 V battery charging voltage seems slightly higher, the car starts charging more quickly when plugged in, and the charging time estimates appear to be more accurate.

The work was carried out by Paul at Rollingmotion Auto Electrical. He explained that the issue required changing the VIN stored in the memory and updating the checksum.

Before contacting him I spoke to a large number of automotive electricians across the country — probably more than 20. All of them declined the job because they had never attempted something like this before. Paul was the only person willing to try. He was upfront that he couldn’t guarantee success and that his fee would still apply even if the repair didn’t work.

The job ended up taking about six weeks, which was longer than the original estimate. I had to follow up several times for updates and was often told it would be finished shortly. In the end he said it took quite a bit of time to figure out how to solve the problem, which likely explains the delay. It would have been easier if the timeline had been communicated more clearly.

That said, I don’t want to be overly critical. This was clearly a difficult and unusual job and he was the only person willing to attempt it when everyone else refused. He ultimately solved the problem and the unit now works perfectly.

So if anyone else runs into this issue, Paul at Rollingmotion Auto Electrical can fix it but it may take some time.

 

[Jomarkh]

I finally got the EEVC back, installed it in the car, and connected SIPS. The update then went through successfully and the car can now charge at Tesla Superchargers.

I’ve also noticed a few improvements since the repair. The 12 V battery charging voltage seems slightly higher, the car starts charging more quickly when plugged in, and the charging time estimates appear to be more accurate.

The work was carried out by Paul at Rollingmotion Auto Electrical. He explained that the issue required changing the VIN stored in the memory and updating the checksum.

Before contacting him I spoke to a large number of automotive electricians across the country — probably more than 20. All of them declined the job because they had never attempted something like this before. Paul was the only person willing to try. He was upfront that he couldn’t guarantee success and that his fee would still apply even if the repair didn’t work.

The job ended up taking about six weeks, which was longer than the original estimate. I had to follow up several times for updates and was often told it would be finished shortly. In the end he said it took quite a bit of time to figure out how to solve the problem, which likely explains the delay. It would have been easier if the timeline had been communicated more clearly.

That said, I don’t want to be overly critical. This was clearly a difficult and unusual job and he was the only person willing to attempt it when everyone else refused. He ultimately solved the problem and the unit now works perfectly.

So if anyone else runs into this issue, Paul at Rollingmotion Auto Electrical can fix it but it may take some time.

Hi, what was the total price to get a replacement unit plus VIN and fitted?
Could you buy a second hand unit and get it programed while still using the original and then just swapping them?

 

[Jymbob]

Hi, what was the total price to get a replacement unit plus VIN and fitted?
Could you buy a second hand unit and get it programed while still using the original and then just swapping them?

You can 100% swap out the EVCC with no noticeable effects on the car. That's what @adamjs16 and I have both done to get us nearer to fixing the Tesla issue ourselves. Mine is still locked, but I've got the one I removed in the garage.

Congrats Adam on finding a Real One.

Also MG5 EVCC reprogramming is now listed on their website:

If you want your MG5 EV to have super fast charging at a Tesla charging point , we can now adapt a used late spec EVCC module for you, with our software. This can then be installed and you can update it yourself to allow this function.

MG5 EV EVCC used late spec module software mod £200.00

 

[adamjs16]

I brought the newer EVCC off ebay and used the orignal whilst the new one was getting unlocked. Paul just unlocked it. You still need to do the firmware update after it has been unlocked. [Guide] DIY Tesla Compatibility Update for MG5 | MG5 EV Forum

The EVCC cost £40 off eBay. Paul gave me a discount as I accepted the risk of it not working. You would need to contact him to get a price.