Change the lambda sensor on 106 1.1i (single point)

The lambda probe is located at the front of the engine

It is screwed onto the exhaust pipe, under the manifold

This step is not necessarily obligatory but the disassembly is very quick and we will be more comfortable working.

remove the hot air hose (it is flexible)

unscrew the 3 screws of the sheet metal on the collector, 10mm key (you can apply penetrating oil in advance)

remove the sheet metal, the probe is a little more accessible

unscrew the two screws holding the air sleeve, 10mm wrench

to remove the air intake, you will also need to remove the plastic lug from its housing (red rectangle).

Move the throttle cable aside after removing it from the 2 plastic clips that hold it in place

and unscrew the air sleeve clamp, 7mm wrench

we can now tilt the whole assembly

the lambda probe socket is now accessible

The part indicated by the yellow arrow is part of the car's LPG system. It makes accessing the socket more difficult. So you'll have a lot more room on a conventional petrol 106.

the socket is locked by the red tab

you will have to move this red tab outwards to release the probe

the probe is fixed to the car via a clip system; you will have to use a small flat screwdriver to lever it and pull it gently towards you to release it

On this vehicle, the clip was broken. I did not replace it because the plug is safe where it is. There is very little constraint. You can replace the clip (this is best), secure the plug with a plastic collar if you wish, or leave it as is.

release the probe connector

unlock the probe using a 22mm flat wrench

finish unscrewing by hand and remove the probe

note the reference on the original probe

and choose an equivalent reference

I took exactly the same brand but it is not an obligation. There are several manufacturers, you just have to take an equivalent probe.

The protective cap will only be removed at the last moment, just before mounting the probe

screw the probe in by hand, taking care not to damage its end

finish tightening using the 22mm flat wrench

The probe must be tightened tightly.

There is a key on the plug so there is no risk of not plugging it in correctly

put the probe socket in place (after having passed it under the various hoses) and clip it onto the clip if your car is still equipped with one

You should hear a "click".

plug in and lock by pressing the red tab

tilt the air sleeve and put it back in place

tighten the clamp using the 7mm wrench and the 2 screws using the 10mm wrench

Be careful to put the lug back in place (yellow rectangle).

put the accelerator cable back in place

Place the sheet metal on the collector and tighten the 3 fixing screws using the 10mm wrench

put the hot air pipe back in place