2014 Nissan Sentra
Key Replacement - Save vs Dealer in Ventura County

2014 Nissan Sentra Smart Key Replacement - Fast, Affordable & Professional

Got a call from a woman out near Cachuma Lake Recreation Area in Santa Barbara. She had a 2014 Sentra SL and her only Intelligent Key had cracked right along the seam where the case halves meet. The buttons were half exposed, the board was visible, and one good drop away from being dead.

She had already called the dealer. They told her to tow it in. She asked how long, and they said a week to get the fob ordered and another visit to program it. She was quiet on the phone when she told me that part. Not angry, just tired.

I drove out and decoded her door lock with my NSN14 Lishi, which reads Nissan's edge-cut NSN14 keyway directly from the wafers. Pulled the CWTWB1U840 fob from stock, cut the emergency insert blade, and connected to the BCM through the OBD port to register the new key. The NATS system on these B17 Sentras runs a challenge-response with the BCM, so the old fob got erased during the same process. No leftover key floating around that could start her car.

Whole thing took about 35 minutes. She sat on her front step scrolling her phone the entire time.

One key, cut and programmed on site, for a fraction of what the dealer route would have cost after towing and shop time.

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