PCS replacement parts slow ramp explained - Grok

[RemoteCybertruck]

The main reasons for the slow ramp-up of replacement PCS (Power Conversion System)


parts for the Cybertruck boil down to a combination of unexpectedly high failure volume, manufacturing complexity, and supply chain realities for this component.


Why the Delay?

• Sudden Surge in Failures Overwhelmed
  Stock: Early Cybertrucks (especially pre-~July 2024 builds, often cited around the first ~ 75k units) used a PCS design with MOSFETs prone to thermal fatigue/failure, particularly under sustained high-amperage (e.g., 48A) home charging. Failures accelerated in early-mid 2026, creating a "tsunami" of repair requests.
  Service centers quickly burned through existing spares, leading to national backorders. cybertruckown... +2
• Complex, Not Fully In-House Part: The PCS is a sophisticated bidirectional 48V power converter handling high-voltage to low-voltage conversion, charging, and more. It's not as vertically integrated as some Tesla components, so sourcing, qualifying, and scaling production of revised boards (e.g., newer Rev G or T2-G) involves suppliers, testing for reliability, and certification. This isn't as quick as ramping simpler parts. youtube
• Production and Logistics Realities: Tesla updated the design in production (new MOSFETs from ~ July 30, 2024), but retrofitting/replacing in the field for thousands of trucks takes time to manufacture at scale.
  Service centers report parts arriving in batches, with ETAs slipping (weeks to 6-8+ weeks in many cases). Labor for replacement is also non-trivial (especially with armor packages), adding to bottlenecks. cybertruckown... +1

Tesla is addressing it aggressively: covering under warranty (with goodwill pricing for out-of-warranty), providing free Supercharging as a workaround, pushing firmware mitigations for partial functionality, and ramping newer revisions.


For 2026+ models, they've extended specific PCS warranty coverage. No full recall yet, as it's not deemed a safety issue (DC fast charging often still works).

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[Outdoors]

What is Grok? That is so cool you did that for all of us.

 

[RemoteCybertruck]

Grok.com is Xai

 

[dalton108]

Grok.com is Xai

You cannot trust LLMs for this type of research. It doesn’t matter which one. They want to give you a good answer and they simply make it up even with a closed data-set as a reference, studies show that 15% of what they say will be hallucinated. It’s not avoidable at this point. It’s just a feature of the technology.

 

[LarryASilva]

The main reasons for the slow ramp-up of replacement PCS (Power Conversion System)


parts for the Cybertruck boil down to a combination of unexpectedly high failure volume, manufacturing complexity, and supply chain realities for this component.


Why the Delay?

• Sudden Surge in Failures Overwhelmed
  Stock: Early Cybertrucks (especially pre-~July 2024 builds, often cited around the first ~ 75k units) used a PCS design with MOSFETs prone to thermal fatigue/failure, particularly under sustained high-amperage (e.g., 48A) home charging. Failures accelerated in early-mid 2026, creating a "tsunami" of repair requests.
  Service centers quickly burned through existing spares, leading to national backorders. cybertruckown... +2
• Complex, Not Fully In-House Part: The PCS is a sophisticated bidirectional 48V power converter handling high-voltage to low-voltage conversion, charging, and more. It's not as vertically integrated as some Tesla components, so sourcing, qualifying, and scaling production of revised boards (e.g., newer Rev G or T2-G) involves suppliers, testing for reliability, and certification. This isn't as quick as ramping simpler parts. youtube
• Production and Logistics Realities: Tesla updated the design in production (new MOSFETs from ~ July 30, 2024), but retrofitting/replacing in the field for thousands of trucks takes time to manufacture at scale.
  Service centers report parts arriving in batches, with ETAs slipping (weeks to 6-8+ weeks in many cases). Labor for replacement is also non-trivial (especially with armor packages), adding to bottlenecks. cybertruckown... +1

Tesla is addressing it aggressively: covering under warranty (with goodwill pricing for out-of-warranty), providing free Supercharging as a workaround, pushing firmware mitigations for partial functionality, and ramping newer revisions.


For 2026+ models, they've extended specific PCS warranty coverage. No full recall yet, as it's not deemed a safety issue (DC fast charging often still works).

Thanks for posting. When I posted similar information on our early PCS problems a few weeks ago, at least one guy wanted AI info on our PCS issues BANNED and replies on my post appeared to be stopped. As a result of all I can read from AI, I have backed off the amperage from my Tesla Wall Charger from 48amps to 24amps in hopes that less heat generated on those MOSFETS .... will help nurse my PCS along until Tesla has more parts in the bin for us. I am also crossing my fingers that living along the relatively cool Pacific ocean coast and charging up overnight in my cool outdoor driveway will help extend the life of my old PCS until Tesla can come to the rescue.

 

[RemoteCybertruck]

You cannot trust LLMs for this type of research. It doesn’t matter which one. They want to give you a good answer and they simply make it up even with a Cloze data set as a reference study show that 15% of what they say will be hallucinated. It’s not avoidable at this point. It’s just a feature of the technology.

 

[RickBush]

Thanks for posting. When I posted similar information on our early PCS problems a few weeks ago, at least one guy wanted AI info on our PCS issues BANNED and replies on my post appeared to be stopped. As a result of all I can read from AI, I have backed off the amperage from my Tesla Wall Charger from 48amps to 24amps in hopes that less heat generated on those MOSFETS .... will help nurse my PCS along until Tesla has more parts in the bin for us. I am also crossing my fingers that living along the relatively cool Pacific ocean coast and charging up overnight in my cool outdoor driveway will help extend the life of my old PCS until Tesla can come to the rescue.

When it starts to fail it goes to 24amps.
Just replaced mine. Took a day.

 

[devdrone6]

Owners complain of PCS issue -> "Journos" report and speculate on delays and issues citing complaints by Owners on social media sites -> More owners cite the articles written by "Journos" -> AI reads and makes conclusions on the issue based on "Journos" and owners posts -> Owner compains of PCS issue ->repeat.

Is there any actual word form Tesla? I haven't seen it, doesn't mean it hasn't happended, but someone show it to me.

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