[Method] OBD tools that read key code for 1971 Jaguar XJ

1078 views - Last reply: February 07, 2025
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How to get my 1971 Jaguar XJ's key code to program replacement keys?

Hello! We've developed a VIN-based tool to help you get your key code for the 1971 Jaguar XJ. Check it out here: VIN Key Code Generator.

Replies (5)

Why is finding a key code on a 1971 Jaguar XJ this hard?!

My 1971 Jaguar XJ won’t budge without the code. Hoping this helps.

Thanks! Been struggling with this on my 1971 Jaguar XJ for a while.

Key code problems with my 1971 Jaguar XJ as well. Subscribed!

Hope this method is better than the last one I tried on my 1971 Jaguar XJ.

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Key Fob Issues
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An anti-theft system that prevents the engine from starting unless it detects the correct transponder chip in the key. The chip sends a unique code to the car's computer when you turn the ignition. No match = no start, even with a physically matching key.
Security Systems
An anti-theft system that prevents the engine from starting unless it detects the correct transponder chip in the key. The chip sends a unique code to the car's computer when you turn the ignition. No match = no start, even with a physically matching key.
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Key Programming
Most transponder keys and smart keys can be reprogrammed if they haven't been damaged. Basic mechanical-only keys (no chip) can't be reprogrammed - they must be physically cut to match your locks.
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