The Mazda Miata NB, specifically the 2001 model year, represents a continuation of Mazda's celebrated lightweight two-seater sports car legacy, embodying the Jinba Ittai philosophy of unity between driver and machine. Renowned for its exceptional driving dynamics, including sharp handling and communicative steering, the NB Miata offered classic convertible sports car proportions. This generation, produced from 1998 to 2005 in Hiroshima, Japan, built upon the heritage of its predecessors, with the 2001 model year featuring a significant facelift. Powered by a naturally aspirated 1.8-liter inline-4 engine producing 140 horsepower, it was available with a 5-speed manual or 4-speed automatic transmission, all contributing to its reputation as an affordable and engaging sports car, often compared to contemporaries like the Honda S2000.

This technical service bulletin supplement and special service tool manual is designed for independent repair shops, automotive technicians, and advanced DIY enthusiasts. It provides comprehensive coverage of the immobilizer system, including complete programming procedures for the immobilizer unit and keys, remote keyless entry transmitter programming, and detailed diagnostic procedures for common immobilizer and key system faults. The manual covers PCM/ECU interaction with the immobilizer control unit, transponder chip identification, signal flow from the ignition switch, and the operation of the anti-theft indicator. It offers step-by-step guides for key programming, procedures for when all keys are lost, remote transmitter synchronization, immobilizer module replacement, and diagnostic troubleshooting flowcharts, assuming intermediate to advanced automotive electrical knowledge and specific diagnostic tools.