There are four.
The 2003 Mercury Grand Marquis came equipped with the 4. 6L V8. Oxygen (O2) sensor locations are upstream and downstream (before and after the catalytic converters).
remove radio from a grand marquis 2003
diagram for 2003 grand marquis belt installation
I have a 2003 mercury grand marquis will sputter around running 35 - 60 mph ?
The Grand Marquis has shocks, not struts. They are simple bolt on parts.
On a 2003 Mercury Grand Marquis : Bank 2 is the drivers side of the engine
According to the 2003 Mercury Grand Marquis Owner Guide : ( 71.9 liters / 19.0 U.S. gallons )
yes
R134a
Location of coolant temperature sensor on a 2003 Mercury Grand Marquis?Read more: Location_of_coolant_temperature_sensor_on_a_2003_Mercury_Grand_Marquis
The 4 cylinder models have two oxygen sensors, and the V6 models have four oxygen sensors.
don't know.