The front one
On a Ford Taurus , V6 engine : firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
The front one. And it's "TAURUS", not "tauras."
where is bank 2 sensor 1 in a 2001 ford taurus ses 6 cyl
On a 2006 Ford Taurus : firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
On a Ford Taurus , V6 engine : firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
On a Ford Taurus V6 : firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
On a 2002 Ford Taurus : firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
On a 2002 Ford Taurus : firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
The bank 1 oxygen sensor on a 2003 Ford Taurus is located on the motor. It is on the top, back part near the firewall.
For a Ford Taurus , V6 engine : firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
In a Ford Taurus : firewall 1-----2-----3 ( Bank 1 ) 4-----5-----6 ( Bank 2 ) front of vehicle