As a rule, Hyundai's Sonata NF washing in the cold time of year leads to the appearance of creaking in the rear suspension. The reason is that the water falls into the details of the suspension, so that the rubber vans of the transverse tracts become smoother. The problem is that the car is being heated in an underground car park or in a heated garage. In addition, you can process the tulls to prevent silicon grease.
