Who makes the CD Changer in a 1999 jaguar What other cars are they in?

The CD changer in a 1999 Jaguar was typically made by Blaupunkt. While they were a common supplier, it's also possible (though less likely) that another manufacturer supplied the unit in some specific models or options. Jaguar didn't make their own CD changers.

Pinpointing exactly *which other cars* used the *same specific Blaupunkt model* found in your 1999 Jaguar is difficult without knowing the exact part number of your changer. Blaupunkt supplied many car manufacturers, and their changers varied across models and years. Therefore, finding an identical unit in another make and model is unlikely. They used similar technology across brands, but the specific part number identifies the unique unit.