Immobilizer 1 can also be identified via the Immobilizer Identification/Serial Number.
If in doubt, check the Factory Repair Manual for your specific Vehicle. Immobilizer 1 Vehicles were sold in the Rest of World (RoW) Market only, not in the North American Region (NAR). Keys for vehicles with Immobilizer 1 usually have a small F on the key blade, which stands for Festcode (Fixed Code). If in doubt, check the Factory Repair Manual for your specific vehicle. The key may also have a W with a strikethrough to indicate that Immobilizer isn't present. None: Cars without Immobilizer will not have a symbol in the instrument cluster showing a key inside a car and will start and run as long as you cut a new key that is able to turn the ignition. Immobilizer Generations are not pinned on a certain Date, they are Model and in some cases even Country/Market specific.The Length of the PIN (4, 5 or 7 digits) it not directly relevant to the Immobilizer Generation/Model.Which Immobilizer System does my Car have and which Procedures are applicable? Many of the older non-US market vehicles as well as some US-Market VW Golf Cabriolet (1E) and VW Transporter/Eurovan (7D) have a separate Immobilizer Control Module Address 25 - Immobilizer. 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?.
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