Is Your Car Making Strange Noises? Here's What It Mean

Hearing an odd noise from your car can be unsettling. Whether it's a knocking under the bonnet, a screech when you brake, or a high-pitched whine as you accelerate, strange sounds usually indicate that something isn’t quite right. These noises may seem minor at first, but they’re often your car’s way of telling you it needs attention.

Understanding what these sounds mean and taking prompt action can save you from expensive repairs and prevent your car from breaking down at the worst possible moment. Regular maintenance and inspections can keep your car in top shape, helping you avoid major issues down the track.

Common Noises and What They Might Mean

1. Squealing or Screeching When Braking

This is one of the most common noises drivers report. If your car squeals when you apply the brakes, it often means the brake pads are worn out. Most modern brake pads come with a small metal tab that makes this noise deliberately when it’s time for a replacement.

Ignoring this noise could lead to the metal backing of the brake pads grinding against the rotor, which can damage the braking system and lead to costly repairs. Routine brake inspections as part of your car service in Thomastown can catch this early.

2. Knocking Sound from the Engine

A persistent knocking or pinging sound from the engine could indicate a problem with the ignition timing or an issue with the type of fuel being used. It may also mean your engine is running low on oil, or the oil is not providing proper lubrication.

In some cases, engine knocking can signal worn engine bearings or connecting rods. If this sound continues, it’s best to have your car inspected promptly by experienced mechanics in Thomastown.

3. Whining or Humming While Driving

A high-pitched whine that changes with speed may be related to transmission problems. Alternatively, it could be an issue with the power steering system or wheel bearings.

A humming noise could also point to uneven tyre wear or problems with wheel alignment. Having your tyres rotated regularly and getting your alignment checked during logbook services is a great preventive step.

4. Rattling Under the Car

If you hear a rattling sound beneath your vehicle, particularly when idling or driving at low speeds, it may be a loose exhaust system component, such as a heat shield or muffler. It could also mean a broken catalytic converter or a loose item in the boot.

While rattling may seem harmless, it can sometimes point to structural damage that needs attention. Your mechanic can quickly identify the source and secure or replace any loose parts.

5. Clicking While Turning

Clicking sounds when turning the steering wheel often indicate an issue with the CV joints (constant velocity joints), which are part of the drive shaft. Worn CV joints can eventually lead to total loss of power to the wheels.

This sound should be taken seriously, especially if it gets louder during tighter turns. Replacing CV joints before they fail is a smart way to avoid getting stranded on the road.

6. Hissing or Sizzling After the Engine is Off

Hearing a hissing noise after you turn off the engine may suggest a coolant or oil leak onto a hot engine component. In some cases, it could be steam escaping from a cooling system under pressure.

Ignoring this can lead to overheating, which could severely damage the engine. Always have coolant levels checked and keep an eye out for puddles under your vehicle.

7. Loud Banging or Backfiring

A loud bang, or what seems like a small explosion, might be a backfire. This happens when fuel burns in the exhaust system rather than in the combustion chamber. Backfires can result from an incorrect fuel-to-air ratio, faulty spark plugs, or a damaged exhaust valve.

These issues can be complex to diagnose, but they’re usually addressed during scheduled logbook services.

Why Routine Maintenance Matters

Strange noises are not only annoying—they’re a red flag. Regular servicing is key to keeping your vehicle safe, efficient, and reliable. Whether it’s a scheduled inspection, oil change, brake check, or engine tune-up, staying on top of maintenance helps prevent small issues from turning into big, costly repairs.

Preventative maintenance ensures your car performs at its best and can significantly extend its lifespan. It also means better fuel economy, safer driving, and greater peace of mind.

Real Benefits of Servicing

· Early Problem Detection: Catching problems early can prevent them from escalating.

· Improved Fuel Efficiency: A well-maintained car consumes less fuel.

· Increased Vehicle Longevity: Proper care ensures your car stays on the road for longer.

· Higher Resale Value: Buyers are more confident purchasing a car with a full service history.

· Peace of Mind: Knowing your vehicle has been checked by professionals gives you confidence on the road.

What to Expect During a Routine Car Service

When you bring your car in for a service, a qualified technician will conduct a range of inspections and replacements based on your manufacturer’s recommendations. This may include:

· Engine oil and filter change

· Brake system inspection

· Tyre pressure and tread check

· Battery test

· Steering and suspension assessment

· Air conditioning performance check

· Fluid top-ups (coolant, brake fluid, power steering, washer fluid)

Each of these checks is aimed at preventing issues like the strange noises mentioned earlier. By sticking to a proper maintenance schedule, you can avoid unnecessary breakdowns and unexpected costs.

Having a reliable team of mechanics you can trust is invaluable. Skilled technicians understand your vehicle inside and out and can spot potential issues before they turn into serious problems. Whether your car is making strange noises or just needs a check-up, a trusted local team will help you stay on the road with confidence.

If you’ve noticed unusual noises coming from your car, it may be time to have it checked by a professional. Schedule a visit with Supertech Auto for expert diagnostics and servicing. We also offer specialised care for BMW, Mercedes, Ford, Volkswagen, and Subaru vehicles, along with ECU remapping, brake repairs, auto air conditioning, and a wide range of other services. Call 1800 06 26 36 to book your next appointment with a team committed to keeping your car performing at its best