One major car part could become “less responsive” in hot weather, Brits have been warned, marking a possible safety risk amid this week’s mini-heatwave. Brakes could become less effective in searing temperatures, with the pads and fluid at risk of developing issues. Hot weather is likely to increase the wear and tear on the brake pads of petrol, diesel and electric vehicles, while a car's brake fluid could boil, which is a major concern. 

These issues could lead to potential brake failure and expensive repair bills for owners in a major blow for cash-strapped road users. Brakes are designed to withstand heat but all components have their limits, with extremely hot weather a major concern. 

Will Pringle, a truck expert at Smith Bros stressed that it was more important road users checked their brakes in warm weather than under normal circumstances. 

He said: “Ensuring your brakes are functioning correctly is always important, but even more so in warmer conditions. 

“Check that your brake fluid isn’t old and that your brake pads are in good working condition as brakes are less responsive when there is a build-up of heat, which will occur even more so in hot weather conditions.”

NAPA Car Care, a leading automotive expert, confirmed that prolonged exposure to extreme heat can speed up the wear and tear of brake pads and rotors. 

Over time, this could lead to reduced braking efficiency and an issue known as brake fade. 

This is where brakes simply become less responsive, meaning it will take longer to stop the vehicle. 

Meanwhile, NAPA stressed that brake fluid was also at risk of “boiling” if high temperatures persist. 

They explained: “Brake fluid is crucial for the hydraulic system in your car’s brakes, transferring force from the brake pedal to the brake components. 

“High temperatures can cause the brake fluid to boil, creating air bubbles in the brake lines. This reduces the fluid’s ability to transfer force, leading to brake failure. 

“Maintaining proper brake fluid levels and considering using high-temperature resistant fluids to ensure your brakes function correctly even in hot weather is essential.”

A spongy or unresponsive brake pedal is one of the biggest warning signs that the vital component may be overheating. 

A burning smell, visible smoke or vibrations through the brake pedal could also indicate a problem.