NATS (Nissan Vehicle Immobilizer System), also known as NVIS (Infiniti Vehicle Immobilizer System.).ġ) USA made models with NATS5, NATS5.6, NATS6 immobilizer – 5 digits code from BCM label (Body Control Module, p/n 284B1, 284B2) made in Japan by Calsonic Kansei Corp. PIN code for NATS (Nissan Anti Theft System) Immobilizer used in most of Nissan and Infinity vehicles.