Giant Fleet

Tesla has done something it rarely does: publicly admit a hardware defect. The company confirmed that the power conversion system (PCS) in pre-2026 Cybertrucks “does not meet our reliability standards” — and it’s backing that admission with a warranty extension to 8 years or 150,000 miles, reimbursements for owners who already paid for repairs, and free Supercharging while replacement parts catch up with demand.

What the PCS does — and how it fails

The power conversion system combines the Cybertruck’s onboard AC charger and its DC-DC converter in a single unit. It converts wall power into DC for the battery whenever the truck plugs into a home or public Level 2 charger, and it also supports the vehicle’s 48-volt low-voltage architecture.

When the unit starts to fail, owners typically see home charging capacity drop from 48 amps to 24 amps before AC charging stops working altogether. Onboard power outlets can go dark too. DC fast charging bypasses the PCS entirely, which is why a truck with a dead unit can still use a Supercharger — small comfort for owners who bought a truck they suddenly couldn’t charge in their own garage.

How widespread is the problem?

Tesla hasn’t published failure numbers, but an owner-run poll cited by Electrek found that roughly 41% of responding early Cybertruck owners — 91 of 223 — had already needed a PCS replacement. That’s a self-selected sample, so the true rate is likely lower, but the volume of reports through July 2026 was loud enough that Tesla moved from quiet goodwill repairs to a formal program.

The stakes were real. The Cybertruck’s original PCS coverage fell under the basic 4-year/50,000-mile vehicle warranty, and out-of-warranty replacement quotes ran from roughly $5,000 to $7,200. According to Not a Tesla App, the current fix moves trucks to “Revision G” of the PCS2 hardware, while the failure-prone units are Revision F or earlier. The 2026 model year ships with the redesigned part from the factory.

The remedy: longer coverage, refunds, and free Supercharging

The program Tesla laid out has four parts. First, PCS coverage on 2024 and 2025 Cybertrucks — Foundation Series and standard trucks alike — is extended to 8 years or 150,000 miles, matching the coverage on the high-voltage battery and drive units. Second, owners who already paid out of pocket for a PCS replacement will be reimbursed. Third, a software update now allows Supercharging to keep working even when the PCS has failed. Fourth, Tesla says it will cover Supercharging costs for affected owners while it works through the parts backlog.

Notably, the redesigned PCS in 2026 trucks gets its own dedicated warranty of 7 years or 70,000 miles — shorter than the retroactive coverage on the older, defective part, but still far beyond the basic vehicle warranty.

What it means

This is the right playbook, executed late. Cybertruck owners spent months trading failure stories before Tesla formalized a fix, and a 41% replacement rate in any owner poll — however unscientific — points to a component that should never have shipped. Still, the response itself is unusually complete: retroactive coverage, cash reimbursement, and a software workaround that keeps trucks usable. With Cybertruck sales already well below Tesla’s early ambitions, the company can’t afford a reputation for leaving early adopters holding five-figure repair bills. An 8-year warranty is cheaper than a recall — and much cheaper than losing the trust of the truck’s most devoted buyers.

Sources: Electrek, Not a Tesla App