An owner retrofitted Hardware 4 into an older Model 3 — ahead of Tesla’s own upgrade program.

A Tesla owner has gotten Hardware 4 running in a 2022 Model 3 that left the factory with the older Hardware 3 computer — doing, unofficially and today, something Tesla itself doesn’t expect to offer at scale until 2027.

What was actually done

Software engineer Michał Gapiński, known for building the Tesla Android CarPlay project, pulled a Hardware 4 (AI4) computer and cameras from a Model Y and installed them in his older Model 3, according to Not a Tesla App’s report published August 21, 2026. The work involved custom adapters for the camera connectors, some low-level software modifications, and physically mounting the new computer with drilled brackets, epoxy, and zip ties. As of that report, the car was driving with the new hardware, though Gapiński said some features were still incomplete.

Why this is ahead of Tesla’s own plan

Tesla has publicly committed to eventually offering HW3 owners a path to newer hardware, but Not a Tesla App’s coverage of that announcement puts the next-generation AI4+ computer at not entering production until mid-2027, with an expected but unconfirmed retrofit cost in the $3,000–$5,000 range once it’s available. Gapiński’s version exists now, outside any official program, using a computer sourced from a donor Model Y rather than a Tesla-supplied part.

What this doesn’t mean for your car

This is one person’s unofficial hardware project, not a Tesla-supported service, and it isn’t something Tesla will do for you at a service center. It doesn’t change the timeline above, and it doesn’t mean Hardware 3 owners have a faster or cheaper path to newer hardware today. What it does show is that the retrofit is mechanically possible with parts that already exist — which is part of why the story caught attention in the first place.

Ryan Shaw covered the retrofit on his channel on August 20, 2026:

The video is one creator’s summary of the project; the facts above — what was actually installed, and Tesla’s own stated timeline — come from the linked reporting, not the video itself.

Photo by Jeremy Waterhouse.