When to replace your brake pads - and the warning signs to watch for
The most common question we get about brakes is "how long should pads last?" The honest answer is: it depends on more variables than any single number can capture. We have customers getting 25,000 km out of a set of front pads, and others getting 80,000 km. Both can be normal.
What actually changes brake pad life
- Driving style. Late, hard braking wears pads dramatically faster than smooth anticipation. This is the single biggest factor.
- Vehicle weight. A heavy SUV with a trailer chews through pads several times faster than a small hatchback.
- Terrain. Steep hills mean more braking, more often. Brisbane and other east-coast cities drivers go through pads faster than Adelaide or Perth drivers on average.
- Traffic. Stop-start city driving wears pads faster than open-road driving at the same kilometres.
- Pad compound. Premium ceramic pads last 30-50% longer than budget semi-metallic pads, but cost more upfront.
The warning signs - listen first, look second
Modern pads have a small metal "squealer" tab that contacts the rotor when the pad is about 3 mm from worn out. The result is a deliberate, high-pitched squeal whenever you brake gently. It is annoying by design - it is the car telling you to book the service in.
Other signs to take seriously:
- Squealing or scraping when you brake softly. This is the squealer doing its job.
- Grinding when you brake. This is bad - the pad material is gone and the metal backing plate is on the rotor. Stop driving and book a service today.
- Brake pedal that travels further than it used to before biting. Could be pads, could be fluid - either way it warrants a check.
- Pulling to one side under braking. Pad wear is rarely perfectly even between left and right. One-sided pulling usually means one side has worn faster.
- Vibration through the pedal or steering wheel under braking. Usually rotor warping, often caused by running pads to the end of their life.
The visual check
You can usually see the front pads through the wheel spokes without removing the wheel. Look at the friction material thickness on the visible side of the rotor. A new pad is 12 mm thick. Time to replace is around 3 mm. Anything under 2 mm is metal-on-metal territory.
If you cannot see clearly through the wheel, or the car has hubcaps that block the view, the next mobile service is the right time to ask for a brake check. We measure all four pads as part of any service.
One more thing
Brake fluid quietly absorbs moisture from the air, even with the system sealed. After 2-3 years, the boiling point drops enough that hard braking can cause vapour lock and a soft pedal. Most service schedules call for a brake fluid change every 30,000 km or 2 years - and it is genuinely a safety item, not a "service upsell".