2011 Toyota 4runner
Key Replacement - Save vs Dealer in Ventura County

2011 Toyota 4runner Remote Head Key Replacement - Fast, Affordable & Professional

A guy in Ventura, over in the College Area, lost his only 4Runner key somewhere between the sand and the parking area near the beach. Looked for close to an hour, checked with the lifeguard station, retraced his steps twice. Nothing. His 2011 4Runner was just sitting in the lot with no way in.

I started with the TOY43 Lishi tool. It picks and decodes the lock cylinder by reading each wafer position, gives me exact bitting depths without the original blade. Clean decode, no drama.

Mechanical side done, I moved to the immobilizer. Connected through the OBD-II port to the 4Runner's immo computer, board number 89784-35150, and ran the all-keys-lost reset sequence to wipe the old 4D-67 registration and write in the new HYQ12BBY. Toyota's fifth-gen 4Runner uses a challenge-response protocol between the transponder and the immo ECU, so the chip has to be virgin or factory-reset before the system accepts it. That part is just software and timing.

Cut the TOY43 blade, seated a fresh CR2016, and handed it over. He turned the key, the security light on the dash flickered once and went out, and the V6 fired right up in the same lot where he lost the original.

Whole job, lock decode to engine running, took about 50 minutes. The dealer quoted him a tow plus a multi-day wait. He drove home instead.

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