Changing the spark plugs on Peugeot 307 1.6 16V 110cv

Step 1: Disconnect a battery terminal (red arrow)

Step 2: Undo the cover to access the power supply using a size 20 Torx screwdriver.

Step 3: Disconnect the two hoses by pressing and pulling on the yellow ends

Step 4: Unscrew the power supply by removing the 4 screws using a size 20 Torx screwdriver (yellow arrows). The two screws on the right are located under the hoses in this photo

Step 5: Disconnect the plug from the power supply (red arrow). To do this, remove the metal clip to the right by playing it and then push the lower part of the plug down. You will get the result in the following photo.

Step 6: Remove the power supply by pulling on it (it comes off easily). This gives you access to the 4 wells containing the spark plugs

Step 7: Remove the spark plugs using a long spark plug wrench (the spark plugs are at the bottom of the tubes) with a 16mm tip (red arrow)

Compare old spark plugs with new ones

Insert the new spark plugs and tighten them securely to ensure a seal.

Put everything back together by taking the steps in reverse order: (replace the power supply - reconnect the power supply and replace the metal clip - screw the power supply back in - reconnect the two hoses by clipping them - replace the protection, screw it back in - reconnect the battery - wait 5 minutes and start the car