Brakes wear gradually. You adapt to the changing pedal feel and longer stopping distances without realising it — until something forces you to brake hard and the car does not respond the way it should.
Here are the seven warning signs that your brakes need attention, what causes each one, and how urgently you should act.
1. Squealing or screeching when braking
What it sounds like: A high-pitched squeal or screech, usually when you first apply the brakes at low speed.
What causes it: Most brake pads have a small metal wear indicator built into them. When the pad wears down to its minimum thickness, this indicator makes contact with the rotor and squeals on purpose — it is designed to warn you.
How urgent: Book a brake inspection soon. The pads still have a small amount of material left, but they are at their limit. Continuing to drive will progress to grinding (see below), which damages the rotors and costs significantly more.
Occasional squeal in wet or cold conditions is normal — moisture on the rotor surface can cause a brief noise that disappears after a few stops. Persistent squealing every time you brake is the real warning.
2. Grinding or metallic scraping
What it sounds like: A harsh metallic grinding or scraping, often felt through the pedal as well as heard.
What causes it: The brake pad material is completely worn through, and the metal backing plate is grinding directly against the rotor. This damages the rotor surface rapidly.
How urgent: Stop driving and get the car checked immediately. Every kilometre you drive with metal-on-metal contact is scoring and warping the rotors, which means a pad replacement turns into a pad-and-rotor replacement — sometimes double the cost.
3. A soft or spongy brake pedal
What it feels like: The pedal sinks further than usual before the brakes engage. It may feel soft, mushy or like you are pushing into a sponge.
What causes it: Several possible causes:
- Air in the brake lines — the most common cause. Air compresses (fluid does not), so bubbles in the lines reduce braking force.
- Low brake fluid — can be from a leak or from pads wearing down (the caliper pistons extend further, drawing more fluid from the reservoir).
- A failing master cylinder — the master cylinder generates hydraulic pressure. Internal seals wear out over time.
- A brake fluid leak — check for wet spots on the inner wheels, calipers or under the car.
How urgent: Do not ignore a soft pedal. It will get worse, and in the worst case the pedal can sink to the floor with minimal braking force. Book it in the same week.
4. Vibration or pulsing when braking
What it feels like: A pulsing or juddering through the brake pedal, and sometimes the steering wheel, when you brake — especially at highway speed.
What causes it: Warped or unevenly worn brake rotors. The rotor surface is no longer flat, so the pad makes inconsistent contact as the rotor spins. This can be caused by:
- Heat damage — heavy braking (long downhill drives, towing) can overheat the rotors and cause warping.
- Uneven pad deposits — sitting with the brakes applied while the rotors are hot can transfer pad material unevenly.
- Age and wear — rotors naturally develop thickness variation over time.
How urgent: Not immediately dangerous at moderate speeds, but the vibration worsens over time and braking becomes less predictable. Book an inspection within the next week or two.
5. Pulling to one side under braking
What it feels like: The car veers or pulls noticeably to the left or right when you press the brakes.
What causes it:
- A stuck or seized caliper — one side is gripping while the other is not, creating uneven braking force.
- Uneven pad wear — the pads on one side are significantly more worn than the other.
- A collapsed brake hose — an internally collapsed hose can trap pressure, causing one caliper to stay partially applied.
How urgent: This is a safety issue. Uneven braking reduces your ability to stop in a straight line, especially in an emergency. Book it in as soon as possible.
6. Longer stopping distances
What it feels like: The car simply takes more road to come to a stop than it used to. You find yourself braking earlier or pressing harder.
What causes it: This is usually a combination of factors rather than one single fault:
- Worn pads reduce friction surface
- Glazed pads or rotors from overheating reduce grip
- Old brake fluid absorbs moisture, lowering its boiling point and reducing hydraulic efficiency
- Worn suspension components (shocks, tyres) also contribute to longer stops
How urgent: Seriously — if you have noticed this, get the whole braking system checked. The change is gradual, so by the time you consciously notice it, the system has been degrading for a while.
7. A brake warning light on the dashboard
What it looks like: Usually a red or amber exclamation mark inside a circle, or the word “BRAKE” on the dash.
What causes it:
- Low brake fluid — the reservoir has dropped below the minimum sensor level.
- Worn pads — some cars have electronic pad wear sensors that trigger the light.
- ABS fault — if the ABS light is also on, the anti-lock system has a fault.
- Handbrake — check the handbrake is fully released. If it is, the light is indicating a system fault.
How urgent: Do not ignore any brake warning light. A steady light means get it checked soon. A light accompanied by a change in pedal feel or braking performance means stop driving and call us.
If a warning light is involved, a diagnostic scan can help pinpoint the exact fault the car has logged.
What to do next
Brakes are not a wait-and-see situation. Catching problems early is always cheaper — a pad replacement is a fraction of the cost of pads, rotors and calipers.
We inspect pads, rotors, lines, fluid and the full braking system. We measure what is left, show you what we found, and tell you honestly what needs doing now and what can safely wait. You get a clear quote before any work starts.
Book a brake inspection at our Oakleigh South workshop, or call us on 0424 156 703.