Questions, answered

FAQ & About Us

The honest answers, with a little personality, plus a bit about who's behind the wires.

So what is TETROFIT, exactly?

We make retrofit kits that bring Highland-style upgrades to the Legacy Model 3, without making your car look like a science project.

Think of us as the friend who knows the wiring diagram by heart and never shows up empty-handed.

How close to OEM can you get?

The goal is to get as close to factory behavior as humanly (and electronically) possible. The OEM lights in your door cards, dash, and more should feel like they were always there.

When something can't match the factory exactly, we'll tell you plainly instead of pretending.

What happens when Tesla updates the car?

Tesla updates cars regularly, and sometimes those updates change things our kits rely on. When that happens, we update the kit firmware to keep up.

Every kit includes lifetime OTA updates, so you don't need a new box to stay current.

What if you can't keep up with the updates?

Honest answer: we're a small team, and we can't promise to keep up with every Tesla update forever.

So here's our backup plan. If we ever can't commit to keeping the kits updated, we reserve the right to release the signing key and open-source all of the software we own. Your kit keeps working, and the community gets the keys to the castle.

How do I know what's going on?

We're transparent about progress. The Progress page shows what's done, what's in progress, and what we're waiting on.

No secret roadmap, and no vague "soon" that quietly means "maybe never."

Do I need to flash the board myself?

Nope. Every board ships ready to go. Install the kit, flip the switch, and enjoy the lights.

Will this void my Tesla warranty?

We're not Tesla, so we can't tell you what your warranty covers. Check with Tesla or your service center.

We'll always be clear about what our kits touch and what they don't.

Is TETROFIT affiliated with Tesla?

Nope. We're an independent company. Tesla is a trademark of Tesla, Inc., and we only use the name to describe which cars our kits fit.

Still curious?

Ask us anything by email, or sign up for news and promotions.