The frequency at which brake pads should be replaced can vary depending on several factors, including the type of brake pads, driving habits, and the vehicle's usage. As a general guideline, it is recommended to replace brake pads approximately every 25,000 to 70,000 miles (40,000 to 110,000 kilometers). However, it is always advisable to consult the manufacturer's recommendations specific to your vehicle model and to regularly inspect your brake pads for any signs of wear or damage. Additionally, factors such as driving in heavy traffic, frequent abrupt stops, or towing heavy loads might increase the need for more frequent brake pad replacements. Ultimately, it is important to prioritize safety and have the brake pads replaced if they are worn beyond an acceptable level.