You must also check underneath the rear of the car between the two tires, where the rear differential is located. If there is a puddle of oil collecting under the car, you probably have a leaking differential gasket. Sounds may also emanate from the gears adjacent to the offending differential. This will sound like a whining or a howling noise.
BMW Bluetooth problems will soon be a thing of the past ;) Most Popular BMW Bluetooth Problems. First up, let's go over the most common issues you might face when trying to get music, podcasts, or other entertainment playing in your BMW with Bluetooth. Remember though, Bluetooth isn't the only way to connect your phone to your BMW. BMW has its fair share of electrical problems. Common problems include wipers, turn signal, CCC iDrive, cooling fan running all the time, and more. These problems vary depending on the BMW model. If you plan to buy a BMW, make sure you have a repair shop in your area specializing in BMW repairs. 16. Blower Fan Motor.