1. Unbalanced or damaged wheels: Unbalanced wheels can cause a vibration that is felt through the steering wheel and the entire front end of the car. Damaged wheels, such as bent or cracked rims, can also cause shaking.
2. Worn ball joints: Ball joints connect the control arms to the steering knuckles and allow the wheels to turn smoothly. When ball joints wear out, they can cause a knocking or clunking sound and lead to shaking or vibration in the front end.
3. Worn tie rod ends: Tie rod ends connect the steering rack to the steering knuckles and enable you to turn the wheels. Worn tie rod ends can cause a clunking or rattling sound and lead to shaking or vibration in the front end.
4. Faulty wheel bearings: Wheel bearings allow the wheels to rotate smoothly. When wheel bearings wear out, they can cause a growling or humming sound and lead to shaking or vibration in the front end.
5. Warped rotors: Warped rotors can cause a pulsating or shuddering feeling in the brake pedal and shaking or vibration in the front end.
6. Damaged suspension components: Other suspension components that can cause shaking or vibration in the front end include control arms, bushings, and springs.
If you experience shaking or vibration in the front end of your BMW at 45 mph, it's important to have it diagnosed and repaired by a qualified mechanic as soon as possible to prevent further damage to your vehicle.
