How to Reset BMW Tire Pressure Light?

[StDelaney]

Hold down the RPA button until the RPA indicator light and warning light illuminate in yellow for a few seconds. Below is relevant information about tire pressure: 1. Relationship between tire pressure and load capacity: Tire pressure is an indicator of a vehicle's load-bearing capacity. The load capacity of a vehicle depends on the level of tire pressure. According to the relationship between the tire's load index, tire pressure, and load capacity, higher tire pressure results in greater load capacity, while lower pressure reduces load capacity. 2. Relationship between tire pressure and vehicle dynamics: When a car is driving at a constant speed on a level road, it must overcome rolling resistance from the ground and air resistance. Tire pressure significantly affects the rolling resistance coefficient. When pressure decreases, the rolling resistance coefficient increases rapidly because lower pressure causes greater tire deformation during rolling, increasing hysteresis loss. 3. Relationship between tire pressure and power cycle: Tire pressure affects tire deformation, which in turn influences the rolling radius, thereby affecting the vehicle's speed.