Changing injectors on Renault Megane 3

Remove the air hose by removing the screw and nut with a 10 wrench.

Unlock the hose retaining clip by prying it up with a small flat-head screwdriver.

Unhook and place the hose to the side

Unscrew and remove the two screws from the cover, using a 10 wrench

Unhook the two clips from the cover

Unhook the harness from the cover using a small flathead screwdriver

Remove the two screws from the gauge well with an 8 wrench to separate it from the cover

Remove the cover by lifting it

Disconnect the injectors by pressing the back of the connector tab and then pulling back the

The code of the new injectors must be configured in the engine computer in order to calibrate each of them according to their position on the engine. To avoid making mistakes, I recommend noting the code and position of each injector (using a smartphone, photos or videos) before disassembling them.

Once you get to the configuration stage with the diagnostic tool, read the codes to identify the position recorded in the calculator and then enter the new codes in the correct place. The procedure varies depending on the diagnostic tool used, I called on a friend for the configuration.

Disconnect the return pipe on each injector

Unlock both sides of the injector high pressure pipe, 17 mm wrench

Spread or remove the pipe

Loosen the screw with a 10 socket and an extension.

Pull the injector upwards using a 14 flat wrench to pivot it at the same time.

Check for the presence of the copper seal on the end of the injector, do not drop anything into the well

Clean the well of all impurities

Compare and remove the caps on the injector(s)

Install a new copper gasket if it is not already present.

Place the injectors in the well and reassemble in the reverse order of the steps

Proceed to configure the injector codes using the diagnostic tool. It is advisable to replace the fuel filter before starting