As is to be expected with 'end of year list' articles like this, they leave out answers to essential questions such as what you pose, which makes the articles far less than fulfilling because they tend to create more questions than they answer.
Other factors involving frequency of theft could be related to demand for complete vehicles and parts domestically and overseas, considering that many stolen cars go to chop shops.
In past years I recall that certain car models were popular among thieves because things such as their seats were incredibly expensive to buy, and oftentimes the parts ultimately went back to other theft victims who bought replacement parts.
There's quite a lot to the dynamics of the stolen car markets and it's a shame that Fox didn't provide any context for this list.
Can only buy a pair to replace it, for $500. No WONDER they stole it.