Aim to replace your brake pads when they reach about 3 mm (or about 1/8 inch) thickness. That’s the industry standard, but you should also listen to your car for any squealing sounds, which could be a warning sign.
Think of your brake pads as the “tires” of your braking system. They are made to wear down, so that your more expensive parts (such as the rotors) do not have to wear down as much.
If you are one of those people who wait until hearing that awful grinding noise to change brake pads, you have already gone beyond the safety limit. And now what would have been a quick-changing pad swap has become a much more expensive repair.
- Replace your brake pads when they reach 3 mm (1/8 inch). Don’t wait until you hear metal-to-metal grinding from your rotor.
- If you hear squeals, your pads are worn/still usable (warning). If you hear grinding, your pads must be replaced immediately.
- Use the “30-30-30” rule for your periodic check-ups, which include having your pads, rotors, and fluid checked every 30,000 miles (or 50,000 km).
- Driving in the city, riding the brakes too much, or towing can significantly shorten the life of your brake components when compared to highway driving.
- Use original manufacturer parts for brakes. This will keep your brakes functioning as they were designed to.
Should You Change Your Rotors Too?
While you don’t always have to change your rotors while replacing the brake pads, most mechanics recommend it. They might say replacing your rotors every time you replace your pads is usually the best route to follow.
When your old rotors have grooves or are warped, they will wear your new pads unevenly and tend to squeal.
Replacing both together provides you with a new, smoother function (less noise) and greater safety.
How Do I Know When To Change Brake Pads?
You don’t always need to pull the wheels off to check your pads. Your car usually gives you plenty of warning signs:
| Symptom | What it usually means |
| High-pitched squeal | Built-in “wear tabs” are scraping the rotor. It’s a “replace me soon” alert. |
| Deep grinding/growling | Emergency: The pad material is gone, and metal is grinding on metal. Stop driving and get to a shop immediately. |
| Vibrating pedal | Your rotors might be warped or unevenly worn. |
| “Soft” or “Cushiony” pedal | Requires more effort to stop; may indicate a hydraulic or fluid issue. |
| Pulling to one side | Could indicate a stuck caliper or unevenly worn pads. |
You can even check your brake pads to figure out if it’s time to change them using this simple guide:
How Long Can You Expect Your Brakes To Work?
Your brakes may last anywhere from 30,000 kms to 80,000 kms (or more), depending on road conditions and how often you commute.
The truth is that many factors affect how long brakes last. Therefore, we need to look at several things when we’re determining brake longevity.
Example #1: Highway Commuters
If most of your driving time is spent on interstate highways, there’s a good chance your brake pads will get you 80,000+ kilometers.
Example #2: City Commuters
If you tend to spend a large part of your commute in main city areas and encounter much stop-and-go congestion, then expect your brakes to only last 30,000-45,000 kilometers.
Example #3: Off-Road/Heavy-Duty Drivers
Towing heavy loads and driving on rough/rocky dirt roads causes maximum wear and tear on your brake pads.
Example #4: Brake Riders
The habit of “brake riding” (lightly resting your right foot on your brake pedal at any time) will contribute toward your need for a mechanic at a much sooner date compared to all other scenarios mentioned above.
Read Also: How Does Regenerative Braking Work?
Choosing a DIY or Professional Repair
If you have an interest in working on your own vehicle, you should keep in mind that in order to work on your own brakes, you must have some specialized tools and other precision measurement equipment to repair the brakes properly.
Otherwise, the best way to save time and frustration and ensure that the job is done correctly the first time is to book an appointment with a qualified auto repair facility.
Besides, if your calipers are damaged or your brake fluid is dirty and needs to be replaced, these will add to the complications of working on brakes yourself.
Final Thoughts
Maintaining your braking system is critical to keep you safe on the road. Speaking from experience, if you wait for your brakes to grind, then you’re already behind the curve!
Have your brakes checked at every oil change, and you will save money on rotors, but more importantly, you will keep yourself and your passengers safe.
Frequently Asked Questions
Can I Drive With 80% Worn Brake Pads?
Yes, however, with only 20% of the material left, the brake pads are approximately 3mm away from being completely worn out. If you are in this situation, you should replace the brake pads as soon as possible.
Is 2mm Bad?
Yes. With the brake pads at 2mm, you are driving on the wear indicators. At this point, you have nearly no friction material left, and you are only moments away from severely damaging your rotors.
How Much Does Replacing Brake Pads Cost?
You can expect to pay $115-$300 per axle for new brake pads and installation. If your calipers are damaged or your brake fluid is dirty and needs to be replaced, those repairs will add to your final bill. Therefore, it is always best to have a complete brake inspection done before performing any repairs.
