How do I know when it's time to change my M3's brake pads?

I've been hearing some squeaking noises from my M3's brakes and I'm worried that it might be time to change the pads. How can I tell if it's time to replace them?

Brake pads typically need to be changed every 30,000-50,000 miles. However, it's important to also monitor your brake pad wear indicator, which will signal when the pads are getting too thin. When you start to hear squeaking noises, that's a good indication that it's time to get them checked and potentially replaced.

One way to check if your M3's brake pads need to be replaced is to visually inspect them. If they are less than a quarter inch thick, it's time to change them. Another way to check is to bring your car to a certified mechanic who can measure the thickness of the pads.