Binding Calipers: If the brake caliper(s) are not functioning correctly (sticking or binding) after they were installed, they can press the brake pads against the rotors even when you are not applying the brakes. This continuous friction can generate excessive heat and cause smoking.
Incorrect Installation: If there was any improper installation during the brake replacement process, such as using incorrect parts, improper mounting of the brake pads or calipers, or insufficient lubrication, it can result in abnormal brake behavior and increase the risk of smoking.
Damaged Brake Components: If there were any underlying issues or damage to the brake components (like faulty or misaligned rotors) prior to or during the brake replacement that went unnoticed or were not replaced, they could contribute to the brakes smoking.
Faulty Brake Fluid: Incorrect or old brake fluid can cause brake parts to overheat and deteriorate more rapidly, leading to potential brake issues and smoking.
Overheated Brakes: If you engage in aggressive driving or apply the brakes excessively, especially on a long descent, the brakes can generate a significant amount of heat. This may cause the brakes to smoke temporarily.
It is important to take the car back to the shop or a qualified mechanic for a thorough inspection to identify the exact cause of the brakes smoking and have it resolved promptly to ensure safe and reliable braking performance on the road.