[Answered] Need key code to program spare for 1986 Jaguar XJS12

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Need the key code to program a replacement key for my 1986 Jaguar XJS12

Hello! We've developed a VIN-based tool to help you get your key code for the 1986 Jaguar XJS12. Check it out here: VIN Key Code Generator.

Replies (3)

Trying this on my 1986 Jaguar XJS12 later. Will report back.

I tried this trick and it actually worked on my 1986 Jaguar XJS12!

This forum is more helpful than my dealer. Thanks from a 1986 Jaguar XJS12 owner.

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You can buy fobs online, but: 1) Must match your exact model/year 2) Many still require professional programming 3) Cheap knockoffs may not work reliably. Some eBay/Amazon sellers offer programming instructions for DIY-friendly models.
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This means your car's immobilizer system can't read the key's transponder. Causes: dead key battery, damaged transponder chip, faulty car antenna ring around ignition, or system needs resetting. Try replacing the battery first.
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