2003 Acura NSX
Key Replacement - Save vs Dealer in Ventura County

2003 Acura NSX MECHANICAL-KEY Replacement - Fast, Affordable & Professional

Got a call from an NSX owner in Ventura, over in the Montalvo neighborhood. His only black master key had a crack running through the plastic shell, and the Megamos 13 chip inside was shifting around. Some days the car fired right up. Other days the green immobilizer light on the dash would flash and he'd have to wiggle the key to get the chip seated close enough to the antenna ring for a clean read.

He'd already called the Acura dealer. They told him they needed his red learning key to register a new one through the standard OBD procedure. He didn't have it. Previous owner never handed it over. Without the red key, the dealer's answer was a full immobilizer control unit replacement, ordering the part, scheduling the labor, and leaving the car sitting on their lot. On an NSX. Outside. For days.

I drove out with a BHD106-PT blank and my cloning setup. Read the Megamos 13 data off his existing black key, wrote it to the new blank, and cut the key to his ignition code. About 25 minutes in his driveway. No red key needed, no immobilizer swap, no tow.

He turned it over twice just to be sure, then stood there holding both keys like he was weighing them. The cracked one went in a drawer. The new one went on his ring. He never left the house, and it cost a fraction of what the dealer quoted.

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