Fluid level in the booster reservoir (Hyundai Sonata Y3)

1. Place the vehicle being tested on a level horizontal surface, start the engine and then turn the steering wheel several times to increase the temperature of the working fluid to approximately 50°C.

2. With the engine idling, turn the steering wheel right and left several times.

Check whether the liquid in the reservoir is foaming, check the liquid level and, if necessary, add it to the reservoir through the oil filter.