The official notice
Defect
Certain vehicles may be equipped with an accessory trailer wiring harness kit that could fail. Over time, moisture could enter the control module and cause a short circuit. Note: This recall only affects Hyundai Genuine Accessory trailer wiring harness kits that were manufactured by third parties and sold in Canada. These kits may have been ordered at the time of a vehicle purchase, or purchased separately from a dealer as an aftermarket accessory.
Safety Risk
A short circuit could create a fire risk. This risk remains even when the vehicle is parked.
Remedy
Hyundai will notify owners by mail and instruct you to inspect your vehicle to see if it has an affected trailer wiring harness installed. If it does, Hyundai will advise you to take your vehicle to a dealer to install a redesigned trailer wiring harness. Hyundai recommends that you should park your vehicle outdoors, and away from other vehicles or structures until the recall repairs have been completed.