2024 Toyota Highlander
Key Replacement - Save vs Dealer in Ventura County

2024 Toyota Highlander Smart Key Replacement - Fast, Affordable & Professional

Got to a 2024 Highlander in San Jose Creek where the owner had already tried everything Google told him. New CR2450 battery, held it near the start button, even wrapped it in aluminum foil after reading some forum post.

The dash kept flashing B279A/15.

I popped the HYQ14FBX fob on his driveway. The battery contacts had that telltale green crust where moisture had crept in. These newer Toyota fobs use a different board layout than the FBC series, and water loves to find its way through the seam. Cleaned the contacts, fresh CR2450, but the board was too far gone.

Cut a new TOY51 blade from his door lock, programmed a fresh HYQ14FBX with the VVDI2. The 2024 Highlander needs the H-chip version, not the older G-chip. Same looking fob, different guts. Had to register it through the OBD port under the dash.

Twenty minutes later, all four buttons worked, push-start recognized it immediately, and that B279A code cleared itself. He mentioned the dealer quoted a two-hour wait just to look at it, plus whatever the fix would take. We handled it right there in his driveway for way less than their diagnostic fee alone.

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