I inherited a OBD2 device from my elder son - not quite as fancy as Bob's but expensive kit back then, as he used it at work for cars that weren't Ford, so did all makes.
What I got for my present Jag., was a factory download of their dealer's computer system. Expensive, at £80. but would be paid for if I had just one or two trips to a dealer, at their prices. Unlike just an OBD2, it can also be used to re-programme stuff like air suspension ride height and much more. Thankfully, I haven't needed to use it.......yet!
JJ.
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