Your car communicates through sounds. Learning to recognise unusual noises can help you catch problems early and describe them accurately to your mechanic.
Squealing When You Start the Engine
Likely cause: A worn or loose drive belt (serpentine belt). This belt drives your alternator, power steering, and air conditioning. The squeal is usually loudest on cold starts and may go away as the engine warms up. Replacement is straightforward and affordable.
Grinding When Braking
Likely cause: Brake pads are completely worn and metal is grinding on the rotor. This needs immediate attention — continuing to drive will damage the rotors and significantly increase repair costs.
Clicking or Popping When Turning
Likely cause: A worn CV (constant velocity) joint. These joints connect your driveshafts to the wheels. A torn CV boot lets grease escape and dirt in, wearing the joint. If caught early, you may only need a new boot. Left too long, the entire shaft may need replacing.
Knocking or Pinging From the Engine
Likely cause: Engine knock can be caused by low octane fuel, carbon buildup, or incorrect ignition timing. Try using the correct fuel grade for your engine. If the noise persists, a diagnostic check is needed.
Hissing Under the Bonnet
Likely cause: A vacuum leak or coolant leak onto a hot surface. A vacuum leak can cause rough idle and poor performance. A coolant leak left unchecked leads to overheating. Either way, get it inspected promptly.
Rumbling or Roaring That Gets Louder With Speed
Likely cause: A worn wheel bearing. The noise typically changes when you turn (louder one way, quieter the other). Wheel bearings should be replaced promptly as a failed bearing can cause a wheel to seize.
Whining From the Engine Bay
Likely cause: Low power steering fluid or a failing power steering pump. Check the fluid level first. If it is low, there may be a leak. A constant whine that changes with engine speed may indicate the pump is wearing out.
Rattling Underneath the Car
Likely cause: A loose heat shield on the exhaust system. These thin metal shields protect components from exhaust heat and can rust and loosen over time. Usually a cheap fix — a few spot welds or clamps.
Cannot figure out what that noise is? Book a diagnostic check and our team will track it down.