For most small and medium sized Peugeots and Citroens the lambda sensor fitted can often differ from the app list according to what was available at the time the car was manufactured. Some of these differences we know about, and as a result you may get more than one match for the car. However, the lambda sensor connecting plug is colour coded between types, and simply knowing this colour can help you greatly when finding the right sensor. The photo will tell you what colour each connector type is. Also, the sensors can be identified using the approximate harness length. If in doubt, it may be advisable to look at the sensor fitted to the car first, before ordering. Of course, if you need help please contact us