Quote from New York Times link below...
"In recent months, there has been a slew of mysterious car break-ins in Los Angeles. What’s odd is that there have been no signs of forced entry. There are no pools of broken glass on the pavement and no scratches on the doors from jimmied locks."
New York Times: Keeping Your Car Safe From Electronic Thieves
2014 Jeep Cherokee, a 2014 Infiniti Q50, or a 2015 Escalade rated most vulnerable. Researchers find 2014 models of Dodge Viper, Audi A8, Honda Accord are the least likely to be hit by hackers.
The World's Most Hackable Cars