If you're hearing a growling or humming noise while driving, especially one that gets louder as you speed up or when turning, you may be dealing with a failing wheel bearing, even if your dashboard shows no warning lights or error codes. At our Toronto auto repair shop, we recently diagnosed a 2019 Toyota Sienna with a classic wheel bearing growling noise (see video below). There were no fault codes stored in the system. Diagnosis: Faulty Front Wheel Bearings After inspection