Hard braking
Constant hard acceleration followed by hard braking wears brake pads and discs down faster than smooth, steady driving. It also burns more fuel. Easing on and off the pedals rather than stabbing at them will make your brakes, and your fuel tank, go further.
Delaying filling up with petrol
Waiting until the fuel light comes on before filling up puts extra strain on the fuel pump. Running low means the pump has to work harder and can draw in sediment that's settled at the bottom of the tank. A near-empty tank also leaves more room for condensation to build up, which can introduce water into the fuel system over time.
Using the clutch as a footrest
Resting a foot on the clutch, even lightly, keeps pressure on the release bearing and clutch plate when they should be fully disengaged. Over time this wears the clutch out well before it should need replacing.
Not checking your tyre pressure
RAC WA recommends checking tyre pressure at least once a month, ideally when the tyres are cold. Over or under inflated tyres affect handling, increase fuel use and wear unevenly, so it's worth building the check into a regular routine rather than waiting for a warning light.
Going too fast over speed bumps
Speed bumps are there to slow traffic down for a reason. Taking them at speed puts sudden, repeated stress on shock absorbers, ball joints and suspension components, and can also damage the front or rear of the car if the approach is too steep.
Missing car services
Skipping a scheduled service doesn't always void a warranty as manufacturers generally assess claims case by case. But if a fault later turns up that can be linked to missed maintenance, a warranty claim can be refused. Regular servicing also catches small issues before they become expensive ones.
Not driving your car at all
Cars are built to be used. Regular driving warms the engine oil and coolant, exercises the brakes and exhaust system, and helps keep the battery charged. A car left sitting for long stretches is more likely to develop problems than one driven regularly.
Sources:
RAC WA (Tyres FAQ)
CHOICE - Car warranties and dealer servicing
