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How to Install H4 LED Bulbs

Model: (Various brands) Various
Part: Light bulb

Today, you will learn how to install H4 LED bulbs. After obtaining the installation kit that includes the two H4 LED bulbs, lift the front cover of the engine compartment and locate where the bulbs you will be replacing are positioned. Usually, the cover caps are round or rectangular. At this point, move the metal lever to release the cover cap, reach in and locate the bulb holder, press the two tabs to release the old bulb. Take your new LED bulb and attach it to the bulb holder, then connect the connector to the bulb, close the cap, and you're done.

Updated on 25 May 2026 by ScegliAuto

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On the Peugeot 407, the boot may become stuck, possibly due to a problem with the control button or the lock actuator. In such cases, you can perform an emergency opening by following the simple procedure shown in this tutorial. First, open the rear doors, then lower the seat back by operating the release lever. Next, go inside the boot, locate the lock, and manually operate it using a flathead screwdriver. The boot will then be free to open.

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