Three Wire

Colour Connection
Black Ref. (out)
Red Ref. (in) & Heater (+)
White Heater (-)

11014T12

Universal Titania Sensor
Output 0 to 1 Volt

taken from...
http://www.lambda-sensor.co.uk/

got mine from there, about 60 quid IIRC.. and reads right compared to stus wideband