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Reasons Why Car Bulbs Burn Out

Model: (Various brands) Various
Part: Light bulb

It may seem strange, but the most common reason for halogen bulbs in our vehicles burning out is overvoltage. A standard H7 bulb is designed to last 550 hours. Given a 'normal' voltage of 12.5 volts, a 5% overvoltage halves its life. This can easily happen if non-original or additional components are fitted to our vehicle. Conversely, if subjected to undervoltage of just 5%, its lifespan doubles. Another enemy of bulbs is shock, such as slamming the boot shut, as the filament can be affected. Of course, this does not happen with xenon bulbs, as they do not have a filament.

Updated on 15 August 2026 by ScegliAuto

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How to Open the Bonnet of a Renault Megane if the Lever is Broken?

If the lever that unlocks the bonnet of the Renault Megane is broken or not functioning, there is an emergency procedure to unlock the mechanism: remove the right front grille located at the top of the bumper. Once the grille is removed, you can locate the actuator mechanism: by pulling the spring in this position, you can unlock the actuator, allowing you to lift the bonnet and access the components located inside the engine compartment. You can then close the bonnet simply by lowering it.

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