1. Wheel Bearings: Worn-out wheel bearings can produce a humming noise while the vehicle is in motion. Additionally, failing wheel bearings can affect the braking performance of the car.
2. Tires: Unevenly worn tires or tires with a damaged sidewall can generate a humming noise. Misaligned wheels or incorrect tire pressure can also cause humming sounds.
3. Transmission Issues: In some cases, a humming noise accompanied by reduced braking performance can indicate transmission problems, such as low transmission fluid or worn-out transmission components.
4. Brake Issues: If your car is humming and the braking performance has decreased, it's important to have the brake system inspected. The humming sound could be coming from worn brake pads, warped rotors, or a failing brake booster.
5. Power Steering: A humming noise and reduced braking may also indicate a problem with the power steering system. Issues like low power steering fluid or a faulty power steering pump can cause these symptoms.
6. Differential Problems: If your car has a differential, worn or damaged differential gears or bearings can create a humming noise. This can sometimes be accompanied by reduced braking performance, especially in vehicles with all-wheel drive or 4WD.
7. Driveline Components: Other driveline components, such as universal joints or driveshaft problems, can also produce a humming noise. These issues can affect the car's overall performance, including braking.
8. Engine or Exhaust System: Rarely, a humming noise that worsens during braking could indicate an issue with the engine or exhaust system. However, this is a less common cause compared to the above-mentioned factors.
To pinpoint the exact cause of the humming noise and decreased braking, it's best to have your vehicle inspected by a qualified mechanic. They can accurately diagnose the problem and recommend appropriate repairs.
