The contact owned a 2021 Kia Soul. The contact received notification of NHTSA Campaign Number: 25V099000 (ENGINE AND ENGINE COOLING). The contact stated that while starting the vehicle, there was an abnormal ticking sound coming from the vehicle. The contact stated that there was an abnormal burning electrical odor. No warning lights were illuminated. The vehicle was taken to the dealer; however, no cause for the failure was found. The vehicle was not repaired. The contact stated that on other occasions while the vehicle was idling, the RPM fell. The dealer and manufacturer were made aware of the failure. The failure mileage was approximately 20,000.