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How do I stop the brake lights staying on in my 2018 Hyundai i30?

The brake lights on my 2018 Hyundai i30 remain on after I have left and locked the car, and flatten the battery. I can only make them go off by stamping hard on the brake pedal. How do I fix this please?

It sounds like the brake-light switch is at fault. These are usually located somewhere in the pedal assembly under the dashboard and, when you push the brake pedal, this simple on-off switch activates the brake lights. If the switch is jammed or stuck, it could cause the brake lights to remain on and cause your flat battery. I’d go with this theory first since a short, sharp whack on the brake pedal turns the lights off, suggesting that it’s a sticky switch that’s your problem.

You could try to lubricate the switch with a spray lubricant, but in most cases, the permanent fix is to replace the actual switch. It’s not a huge job and shouldn’t cost too much. That said, your car should still be under factory warranty, so it’s the dealer’s job to fix it.

Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.

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