Onboard charger needs replacing

[KLYnick]

Thank you for your answer - let me know how it goes for you. I will make pictures/a video if I manage to replace it - that will make life easier for the next of us who attempt this.
I am a little afraid to wait because if only one more phase goes out, I will not be able to use it anymore. What I will do is store it for now, put it back and then go to Tesla if a recall is issued.

 

[dbldwn02]

Thank you for your answer - let me know how it goes for you. I will make pictures/a video if I manage to replace it - that will make life easier for the next of us who attempt this.
I am a little afraid to wait because if only one more phase goes out, I will not be able to use it anymore. What I will do is store it for now, put it back and then go to Tesla if a recall is issued.

Make sure you get the correct revision AND the one that matches your "XS x-x" code. My code that's etched into the charger is XS 1-1. The one I got in the mail was a 1-2. I couldn't get the car to recognize or deploy firmware to the "1-2" My only option is to see if the seller has a 1-1 sitting around and then try again.

I'm being told by people who are experienced with this issue (not Tesla Techs) that if the configuration changes, Tesla Toolbox is needed to fix it. $100/day or $3000/yr. Your best bet is to make friends with someone who has Tesla Toolbox BEFORE you swap the charger.

 

[KLYnick]

I currently have the exact issue with my 2013 Tesla Model S . I almost had a small stroke when the quoted $3000.00 plus tax. Your questions mirror my questions. I hope someone gets back to us with some answers.

If you have a 2013 MS, then it is not the same. You gave either Gen1 or Gen2 OBC that can be fixed with ease. Can you post a picture of them? They are situated under the rear seat.

 

[dbldwn02]

If you have a 2013 MS, then it is not the same. You gave either Gen1 or Gen2 OBC that can be fixed with ease. Can you post a picture of them? They are situated under the rear seat.

Did you try to replace yours yet? I'm overseas and will have to wait a couple more weeks. I have an XS1-1 coming in the mail.

 

[dbldwn02]

We'll, it worked! Back to charging at 48 amps!

The XS1-1 is the correct part. The 1-2 wouldn't take the firmware upgrade. It just faulted mid flash.

Luckily Tesla decided to give me 2021 firmware upgrade today, the same day I swapped the charger. I can't believe the timing on that! I didn't have to mess with restaging firmware, service menus, or toolbox.

I'll make a write up with some tips, tricks and gotchas.

Thanks for everyone's help!!! Couldn't have done it without yous guys!

 

[KLYnick]

Congrats! So so so happy for you! If you have time, I guess a work instructions/manual would be highly appreciated by more owners (myself included).

 

[dbldwn02]

Replacing Onboard Charger Gen3 2017 MS75D...My Experience (With Photos)

Here is my experience replacing my onboard charger on my 2017 Tesla MS75D. Disclosure… Don’t try this at home, YMMV, High voltage, you can kill yourself if you do something stupid, yadda-yadda, I’m not liable if you do this, warranty void, blah blah blah… My car specs: 2017 MS 75D (USA) Gen...

teslamotorsclub.com

 

[forays]

Anyone have any updates? I am having the same problem - Dec 2016 Model S - P100D with 75W charger

 

[dbldwn02]

Anyone have any updates? I am having the same problem - Dec 2016 Model S - P100D with 75W charger

Update for what exactly? What's a 75w charger?

If you have the half charge rate problem, it sounds like you need a new charger. $3k if Tesla does it. $500-750 if you buy one off eBay and do it yourself. If you're not experienced working around high voltage I would recommend you take it to Tesla.

Or just let it charge at half rate. Which is totally fine too.

 

[Zeeshan Javaid]

My model X 2016 has same problem. It charges at 48/72A now so I assume one module has failed.
Will it effect battery if I keep on using it like this ? At home it charges at full 32A.

 

[amitshah21245]

Do I need to replace the whole onboard charger or just the fuse? Any help would be appreciated. I am ok charging at 26 amps but I would not want the whole charger to go and be stuck not being able to charge. I've seen the youtube video on how to replace the bad fuse but I just would like some insight if anybody has come across this issue and had it fixed. Thanks

 

[Zeeshan Javaid]

No fuses in Gen 3 onboard chargers. You have to replace whole unit.
For how long if your charging slow now ?

 

[Zeeshan Javaid]

I haven’t found a single YouTube video or instructions about model X onboard charger. All the ones available are for model S.

 

[Jose Garcia 54]

I haven’t found a single YouTube video or instructions about model X onboard charger. All the ones available are for model S.

you have to buy the MX service manual. It's on ebay.

 

[mxnym]

you have to buy the MX service manual. It's on ebay.

Unless it was a one year stunt, you can subscribe to the service manual for free.

Currently, on Tesla Service:

Create a Tesla Account to access the following resources for free. Additional Diagnostic Software can be added to your account by purchasing a subscription.

• Service Manual, Parts Manual, and Body Repair

• Tooling Catalog and Wiring Diagrams

• Service Bulletins

• Labor Codes and Times

• Service Mode Diagnostic Software (on the touchscreen)

 

[Zeeshan Javaid]

It’s not free

 

[mxnym]

It’s not free

I copied and pasted that quote from the page. It literally says free. I also have an account and have accessed it for free. Maybe it's only free in the US.

 

[acoburn73]

I copied and pasted that quote from the page. It literally says free. I also have an account and have accessed it for free. Maybe it's only free in the US.

Reviving this thread as my 2017 (July 2018 build) Model X 100D just had the 24A reduction failure last night. Details:

Plugged in and scheduled for departure.
14-50 NEMA on a 50A breaker (professionally installed).
Using mobile charger (older gen 1 from my MX and MS).
Woke up to no charging and no power on app.
Went to breaker, it was tripped, reset.
Plugged in car, only at 24A and won't stay at 40A.
Tried on my other two Teslas ('21 MYLR and '15 MS 70D) - both get 40A, so NEMA plug and breaker are fine.
Retried on MX, same thing.
Reset MX, then retried, same thing - 24A max.

Has to be the onboard charger.

Of note, I just replaced the port door assembly myself due to a door sensor error (new part from Tesla SC for $92 w/tax). All has been good for a few days, then this. I was worried I bumped something when doing this as the onboard charger in the X is in the same area in the rear cargo sidewall as the port door/port. Doubtful, but timing is odd.

I can replace the onboard myself, but want to know how to figure out what generation my MX has. Any insight would be great. Of course I could just wait on Tesla service to respond in the app to my inquiry and let them do a full estimate where they always list all parts required, but I'm impatient.

 

[EbS-P]

Just had my 2017 (December 2016) charger replaced last night. I had the 72 amp onboard charger. It was $2,200 for the part. You really want to change all the high voltage connections and coolant connections? Labor was $660. I’d only do a self install if it was a used charger.

 

[mxnym]

how to figure out what generation my MX has.

Assuming there are no more than three potentially relevant "generations" (surely the smallest 3 charger isn't available on any X) you should know the following:
1) The first "generation" had single and dual options, with the single option maxing out at 40A and the dual maxing out at 80A. I think this generation is considered gen2 and was discontinued before the X started being manufactured, but I'm not certain(there was no production pre-facelift X as far as I am aware). Source: Tesla Model S/X GEN2 Charger - openinverter.org wiki
2) The second "generation" (which must be gen3 if that is gen2) had three slots, but two options: 48A or 72A. I don't remember what the option was called (or when/if you even had a choice vs getting the larger option with the 100 and the smaller with the 75).
3) The third "generation" (which may still be gen3, I have no clue) only has one option: 48A.

My 2017 X100D manufactured in June has the 72A charge option. Assuming your MCU shows you 72A capacity for charging when your X is not plugged in, that should pretty much tell you which charger you have. If it shows 48A (or anything else which would likely confirm problems with the onboard charger), you'll need to do a bit more research to figure out what you need to know (i.e. maybe there is a way to tell in the MCU, maybe you can plug the VIN into some site).