sensor ?

[marchfc]

can anyone help I am trying to find out what sensor this is this is underneath the car its a fiat panda 57 plate 2 pictures are the sensor and the other two picture is what seems to be another sensor if anyone can help that would be great

 

[judderbar]

Those are the 'Lamdas' used for measuring the exhaust oxygen content to control the air:fuel mixture.

http://ngkntk.co.uk/index.php/technical-centre/lambda-sensors/how-does-the-lambda-sensor-work/