# Kill Switch for Toyota 4Runner: Make a Cloned Key Worthless > A patent-pending drop-in starter-relay bypass. No cut wires, fully reversible — your 4Runner won't crank until you disarm it. ## Quick facts - **Vehicle:** Toyota 4Runner - **Fits:** 30+ makes — confirm exact fit with the Make/Model/Year + VIN selector - **Price:** Wired Pushbutton $108 · Wireless Remote $179 - **Install:** Wireless Level 1/5, Wired Level 2–3/5 — no cut wires, 100% reversible, returns to full OEM stock in minutes, does not void warranty - **What it stops:** drive-away theft — a relay attack, cloned key, or OBD reprogramming can't crank the engine until you disarm it - **Buy / check fitment:** https://41twentytwo.com/product/vehicle-kill-switch/ Your factory immobilizer was supposed to stop key-cloning thefts — but every modern 4Runner attack works by handing the thief a "valid" key. The 41.22 kill switch goes one layer deeper: it pulls your factory starter relay and drops in its place, so the engine never cranks until you arm it back. Here's how it works on a 4Runner. ## Why Toyota 4Runners get targeted 4Runner theft isn't random — it's targeted. A 4Runner doesn't get taken by a kid with a screwdriver; it gets taken by a crew with a ~$200 relay box at 3 a.m., started from your driveway without anyone touching your keys, and loaded into a container for resale overseas. The nicer the rig — TRD Pro, low miles — the better an export candidate it is. Your immobilizer checks for a valid key. Relay attacks, OBD-port cloning, and CAN injection all produce one. **By the numbers:** 42 — 2022–24 4Runner 4WD relative theft-claim frequency vs. an all-vehicle average of 100 (HLDI WT-24) · 100+ — Toyotas stolen around Ottawa in months during the 2019 relay-attack export wave · 0 — wires cut — our module drops in at the relay ## Pop the relay, drop ours in, the starter stays dead A relay attack, a cloned fob from the OBD port, or a CAN-injection box behind the headlight all get the thief the same result — dash lights up, truck unlocks, and the starter never engages. The signal that cranks the engine is physically interrupted until you disarm it. No soldering, no cut wires, and it pops back to stock in minutes. - **Wired Pushbutton ($108):** A hidden pushbutton you mount somewhere only you know. No batteries, ever. - **Wireless Remote ($179):** Two keychain remotes, the easiest install we make. Disarm from indoors; works with remote start. ## Watch the drop-in install, start to finish Pull the factory starter relay, plug the 41.22 module into the empty socket, mount your switch where only you can reach it, and arm it. No tools beyond what's already in your glovebox. Reverse it any time and you're back to stock. ## Is a kill switch the best anti-theft for a Toyota 4Runner? Alarms get ignored. GPS trackers tell you where your 4Runner went — not how to keep it, and CAN-injection thefts have defeated factory tracking in under ten minutes. A kill switch is the only layer that stops the truck from moving in the first place, and it stacks fine with whatever you already run. It's the cheapest "no" you can give a thief. ## Toyota 4Runner kill switch FAQ **My 4Runner already has a factory immobilizer — do I still need this?** The immobilizer is real protection against hot-wiring, which is one reason 4Runner theft rates run below average. But it only checks whether the key is valid — and relay attacks and OBD-port cloning hand the thief a key the truck accepts. The kill switch is a second, independent layer that no key, real or cloned, can satisfy. **Will it stop a relay attack on my 4Runner?** Yes — that's the exact scenario it's built for. In a relay attack the thief borrows your fob's signal so the truck unlocks and tries to start normally. With the 41.22 module in the starter-relay slot, that start command goes nowhere until you disarm it. The signal boost works; the truck still doesn't move. **Does installing it void my Toyota warranty?** It shouldn't. Nothing is cut or spliced — the module drops into the existing relay socket, so there's no permanent modification to point at. And if you ever need to, you can return the truck to full OEM stock in just a few minutes by swapping the factory relay back in. **Should I get the wired or wireless version?** Wireless ($179) is the easiest install — Level 1 of 5 — with two keychain remotes and the ability to disarm from indoors before a remote start. Wired ($108) is a hidden pushbutton with no batteries to ever think about; install is a touch harder because you route one wire through the firewall. Both kill the same circuit. **Is my 4Runner 100% theft-proof with this installed?** No product makes a vehicle theft-proof — a determined crew can still tow it. A dead starter circuit makes yours a far harder target, taking it off the fast, quiet, drive-it-away export list. Most thieves move on to the easier truck, which is the whole point. ## Make your 4Runner the one that won't start From $108 · installs in an afternoon · reversible anytime. --- More: [all vehicles](https://41twentytwo.com/kill-switch-by-vehicle/) · [product & fitment selector](https://41twentytwo.com/product/vehicle-kill-switch/) · [recovery gear](https://41twentytwo.com/product-category/recovery/) *41.22 Inc · Made in Lake Elsinore, California, USA.*