Upper Class Vehicles like the current Audi A5, A6, A8 and Q7 have a separate Immobilizer in Address 05 - Acc/Start Authorization. In most vehicles the Immobilizer Control Module is integrated into the Instrument Cluster. In the rest of the world, Immobilizer usage was introduced earlier. In the US/Canada, most VW/Audi models prior to model year 2000 did not have Immobilizer. In some cases other Modules or Parts may be Immobilizer related as well, for example newer Audi Models also have the Transmission as Part of the Immobilizer. The components of the Immobilizer system that require special procedures for replacement include the keys, Engine controller (ECU), and the Instrument Cluster (or the separate Immobilizer modules in vehicles so equipped). Several different Immobilizer schemes have been used for different years and different models of vehicles with different procedures that apply to them. The Immobilizer prevents the car from running unless an authorized key is present and has been properly matched to various components in the vehicle. What is Immobilizer and why is it important? 6 What else needs to be done after Keys are matched?.4 What Information is required for Immobilizer Procedures?.3 Which Immobilizer System does my Car have and which Procedures are applicable?.1 What is Immobilizer and why is it important?.
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