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Power Conversion System (PCS) failure

cali8484

Member
Jul 8, 2018
271
148
California
Did you ever get resolution on this? I am at 56k miles and get 0 amps while AC charging. Service scheduled for Wednesday. They reached out today and informed me it’s most likely the PCS, isn’t covered under warranty and will cost me $1500 USD... I’ve asked to see some documentation on how it’s not covered as part of the battery/drive unit warranty. To me it’s akin to the inverter on the motor failing and saying that it’s not part of the motor warranty. What else in inside this penthouse that can cost me thousands?

To add, I have a coworker who just ordered a Model 3. I told him I’ve only had an amazing experience so far but I’m sure this will scare him away. He keeps his cars for 10+ years and his main concern was the battery warranty. Before today I would’ve told him (apparently incorrectly) everything in the penthouse was covered.


Tesla should definitely point where the warranty excludes PCS. I also had PCS failure and Tesla replaced under warranty and it makes sense to me as it's equivalent to part of fuel management/fill system on ICE cars which is covered under warranty at least for Mercedes.
 

MP3Mike

Well-Known Member
Feb 1, 2016
16,184
36,500
Oregon
Tesla should definitely point where the warranty excludes PCS. I also had PCS failure and Tesla replaced under warranty and it makes sense to me as it's equivalent to part of fuel management/fill system on ICE cars which is covered under warranty at least for Mercedes.

Was your PCS replaced under the bumper-to-bumper warranty, or the battery warranty?

They don't cover the equivalent parts on the Model S under the battery warranty, but they aren't inside the pack. Unless new battery packs come without a PCS and they move your PCS from a failed pack to a new pack I think it would be really hard to support that the PCS isn't covered as part of the battery warranty.
 
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Vol16

Member
Jan 21, 2018
88
126
Cincinnati
Update: Good news, after receiving an invoice estimate this morning of $1,800 to replace the PCS I called them and asked a few questions about battery replacement and if the PCS is replaced with the battery, what’s exactly covered in the battery and drive unit warranty, etc. I also asked about the used vehicle warranty which is additional coverage for 10k miles/ 1 year after the 4yr/50k mile warranty expires. Since I purchased this car in February of this year and it has 56k miles I should be covered under this warranty. The service advisor I spoke to took my questions down and said he would discuss with the sales and the service manager. After a few hours he called back and said they would replace the PCS under warranty. I am very pleased but did not push why they came to that decision, I assume it was the additional 1yr/10k mile warranty that they did not seem to know about, as they tried to get me to approve the $1,800 invoice this morning under customer pay. I’m having a Bourbon now to celebrate avoiding a huge bill.
 

MP3Mike

Well-Known Member
Feb 1, 2016
16,184
36,500
Oregon
I also asked about the used vehicle warranty which is additional coverage for 10k miles/ 1 year after the 4yr/50k mile warranty expires. Since I purchased this car in February of this year

Was that the used car warranty back in February? I thought back then it was a 4-year/50k mile warranty from when you purchased it... (But it is hard to keep track of all of the changes that Tesla makes.)

But I'm glad that they did the right thing for you and covering under warranty.
 

ucmndd

Well-Known Member
Mar 10, 2016
6,905
13,045
California
Great news, if the car has an active used car warranty of course they should replace it, and they should be telling YOU this instead of the other way around.
 
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Vol16

Member
Jan 21, 2018
88
126
Cincinnati
Was that the used car warranty back in February? I thought back then it was a 4-year/50k mile warranty from when you purchased it... (But it is hard to keep track of all of the changes that Tesla makes.)

But I'm glad that they did the right thing for you and covering under warranty.

Not sure to be honest, but the website today states used cars get an additional 1yr/10k after the 4yr/50 expires.
 

Pbaker

Supporting Member
Supporting Member
Aug 13, 2016
100
39
Rancho Cucamonga, CA
My 2018 model 3 LR also had the reduction in charging at home, it has 63k miles so they also quoted me $1800 to replace the PCS. When the SA called to tell me the cost, I also asked about the battery warranty and she said that it was not covered under the battery warranty, I said go ahead and do the work, but I would like the old part given back to me. She asked why and I said because you are making me pay for a new one. She said she would have to get back to me, toward the end of the day she called me back and said when they dropped the pack to replace the PCS they found moisture in the pack and would have to replace the pack and the PCS would now be covered under warranty.... It has been with them since Dec 30th, still waiting for the pack....
 

rrolsbe

Member
Feb 18, 2017
238
131
Albuquerque
My 2018 model 3 LR also had the reduction in charging at home, it has 63k miles so they also quoted me $1800 to replace the PCS. When the SA called to tell me the cost, I also asked about the battery warranty and she said that it was not covered under the battery warranty, I said go ahead and do the work, but I would like the old part given back to me. She asked why and I said because you are making me pay for a new one. She said she would have to get back to me, toward the end of the day she called me back and said when they dropped the pack to replace the PCS they found moisture in the pack and would have to replace the pack and the PCS would now be covered under warranty.... It has been with them since Dec 30th, still waiting for the pack....

I am almost sure changing out the PCS does not require dropping the battery pack, it is accessible by removing the penthouse cover located under the back seat. They probably found water or moisture when they removed that cover. I always ask for the old parts when anyone repairs my vehicles. Asking for the parts sometimes makes it covered by warranty instead of out of pocket.
 
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