A grating noise when accelerating a car is often a sign of bad brakes. The disk brake pads rest against the rotors at all times. When the material on the pad wears through, the metal plate that backs the pad rests agains... More »

The cartilage covering the bones grow uneven when a person grows up, creating a situation where the bones cross each other when a person stands or walks thus causing the knees to make noise, as stated by WebMD. Most peop... More »

www.reference.com Health Pain & Symptoms

While whistling noises in a car are due to several different problems, a vacuum leak is one common reason for this issue. Vacuum leaks also cause the car to run rough and stall. Worn, broken or cracked vacuum hoses are a... More »

A grinding noise during a turn is typically a sign of a failing constant velocity joint on a front-wheel-drive car. The constant velocity joint provides power to the front wheels, allowing the car to turn. More »

Signs of bad car rotors include brake noise, a vibration or wobbling when pressing the brakes, or squealing or squeaking noises. Grinding noises when pushing the brake pedal also indicate bad rotors. Anti-lock braking sy... More »

There are various possible reasons why a car makes a humming or whirring noise as these sounds could be a sign of a bad bearing in the steering system, water pump or alternator. Faulty air conditioning systems may make a... More »

CarsDirect.com explains that when a vehicle shakes as it slows down and the brakes are applied, worn brake rotors or unevenly worn pads are likely culprits. According to the source, excessive wear on the rotors and the a... More »