Clearly, the first thing you should do is swap the left and right rear tires. Or just replace the left rear with the spare. Take the car for a test drive. If the noise has changed, you have identified the problem as a bad tire.
Clearly, the first thing you should do is swap the left and right rear tires. Or just replace the left rear with the spare. Take the car for a test drive. If the noise has changed, you have identified the problem as a bad tire.