Pre-cat oxygen sensor.Located before the catalytic converter. Select O2 sensor location from the menu. Made By IDO pipe
X5 4.4i 2004-2006 \/ Drivers Side Before Catalyst,X5 4.4i 2004-2006 \/ Passenger Side Before Catalyst,X5 4.8is 2004-2006 \/ Drivers Side Before Catalyst,X5 4.8is 2004-2006 \/ Passenger Side Before Catalyst
