One Owner Just Did What Tesla Couldn't: Upgrade an Older Car to HW4

A Tesla owner has apparently succeeded in retrofitting an older vehicle with Hardware 4, the latest iteration of Tesla's self-driving hardware suite—a capability Tesla itself has yet to officially offer.

What Happened

According to a report from InsideEVs, progress on HW4 retrofits has been limited, but at least one owner appears to have completed such an upgrade. The retrofit involves swapping out earlier hardware generations for the newer HW4 platform, which powers Tesla's Full Self-Driving capabilities and includes updated cameras and processing units.

Why It Matters

Tesla has not rolled out an official HW4 retrofit program for owners of vehicles equipped with Hardware 3 or earlier. This leaves owners of older Teslas unable to access the latest self-driving features without purchasing a new vehicle. An aftermarket or owner-completed upgrade could set a precedent, potentially offering a workaround for those seeking to extend the life and capability of their existing cars.

The Bottom Line

While details remain limited, this development highlights ongoing interest in hardware upgradability for older Tesla vehicles. Whether such retrofits become widespread depends on factors including technical feasibility, cost, and whether Tesla formally supports or restricts third-party HW4 installations.