Noises
Why is my car making a grinding or squealing noise when I brake?
That squeal or grind when you brake is unsettling — and it almost always means your brakes are trying to tell you something. The good news: caught early, brake noise is usually an inexpensive fix. Ignored, it can turn into rotor damage and a much larger bill.
Quick Answer
A squealing noise when braking usually means your brake pads are worn and the built-in wear indicator is rubbing the rotor. A harsh grinding noise means the pads are gone and metal is contacting metal — stop driving and get it inspected immediately, because rotor damage is likely and stopping power is compromised.
Safety First
A metal-on-metal grinding noise means your pads are fully worn. Continuing to drive can destroy your rotors and seriously reduce stopping power. Have it inspected right away.
Most Likely Causes
Listed from most to least likely. Only a proper inspection can confirm the exact cause for your vehicle.
- 1
Worn brake pads (wear indicator)
Most likelyMost brake pads have a small metal tab that squeals against the rotor when the pad gets thin — an intentional early warning that it is time for new pads.
- 2
Pads completely worn out (metal-on-metal)
CommonA deep grinding sound means the friction material is gone and the steel backing plate is scraping the rotor. This damages rotors quickly and is a safety risk.
- 3
Warped or glazed rotors
PossibleOverheated or unevenly worn rotors can cause squealing or a pulsing noise, often alongside vibration through the pedal.
- 4
Stuck caliper or debris
Less commonA seized caliper, a stone caught in the brake assembly, or surface rust after the car sits overnight can all create scraping or squealing that may need cleaning or repair.
How Adam & Son Diagnoses It
Free brake inspection
We pull each wheel and measure pad thickness and rotor condition, then take digital photos so you can see exactly what we see.
Road test
We reproduce the noise on a test drive to confirm whether it comes from the pads, rotors, or a caliper.
Honest recommendation
Our salaried advisors tell you what needs attention now versus what can safely wait — no commission, no pressure.
Related Services
The repairs and inspections that address this symptom.
Frequently Asked Questions
Worried About This? Let's Take a Look.
No commission sales. Digital inspections with photos. Honest answers about what needs fixing now and what can wait. Every repair supports the Stranded Motorist Fund.