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Immobilizer Unit Removal/Installation

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable.
  2. Remove in the order indicated in the table.
    Fig 1: Removing Immobilizer Unit
    G03638788Courtesy of MAZDA MOTORS CORP.
  3. Install in the reverse order of removal.
    CAUTION:
    • After replacing the immobilizer unit with a new one, the engine cannot be started without reprogramming the ID number of the keys and the code word of the new immobilizer unit. Input the ID number and code word. (See IMMOBILIZER SYSTEM REPROGRAM PROCEDURE .)