The oxygen sensors are screwed into the exhaust pipe behind the engine.
A 2003 Chrysler van has two oxygen sensors in the exhaust pipe on the rear of the engine.
any car after 1995 has two, or four oxygen sensors,as they use OBDII system
You can not eliminate the oxygen sensors if you ever want the engine to run properly.
The 2003 Buick Regal has a V6 engine.
The 4 cylinder models have two oxygen sensors, and the V6 models have four oxygen sensors.
The 2003 Buick Regal has a 3.8 L base engine size.
4
how many oxygen sensors does a 2003 kia sedona 3.5 have
The 2003 Buick Regal's engine produces 200 hp @ 5200 rpm.
The 2003 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.
It will depend on the engine size. All will have 1 before the catalytic converter and 1 after each one.