02 sensors on a 2004 Mercury Grand Marquis

Asked by Oct 10, 2015 at 10:25 PM about the 2004 Mercury Grand Marquis

Question type: Maintenance & Repair

How many are there? 2 or 4? The dealership is trying to tell me there's only 3.
Doesn't make any sense to me.

1 Answer

60,935

The dealer is correct. There's 3. One is the upstream oxygen sensor and the other two are the downstream oxygen sensors. You have 2 catalytic converters. That's why there's 2 downstream oxygen sensors. HTH. -Jim

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • location of cylinder head temperature sensor 2007 mercury grand marquis ls 1 answer

    where is the cylinder head temperature sensor located on a 2007 mercury grand marquis ls. Diagram if available.

    2007 Mercury Grand Marquis LS Premium

    -

    Maintenance & Repair

  • 2004 Mercury Gand Marquis will not start 4 answers

    Searched for: My neighbor has a 2004 Mercury Marquis that has and intermittant starting problem. It will operate fine for 3 or 4 weeks, then you go to start it and it will not start. It turns over fin...

    2004 Mercury Grand Marquis

    -

    Maintenance & Repair

  • 2004 Mercury Grand Marquis 3 answers

    The air blower will not trun off when the "OFF", button is pushed. Previously the blend door actuator, I was told is the problem. The car hvac was blowing hot air on ac mode. I was told to discon...

    2004 Mercury Grand Marquis

    -

    Maintenance & Repair

  • Engine replacement - '93 Mercury Grand Marquis LS 4D Sedan 3 answers

    How much would it cost to replace the engine - (4.6L V8 EFI) - in a '93 Mercury Grand Marquis LS 4D Sedan?

    1993 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

  • Will the doors from a 1988 Mercury Grand Marquis fit a 1987 Mercury Grand Marquis? 3 answers

    I am trying to refurbish my Dad's 1987 Mercury Grand Marquis. The doors and truck lid are rusty and need to be replaced. Will the doors and truck lid from a 1988 Mercury Grand Marquis fit?

    1987 Mercury Grand Marquis

    -

    Car Customization

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,150
#2 kbro
kbro
Reputation 2,040
#3 Js08016
Js08016
Reputation 1,620
View All

Related Models For Sale

Used Ford Crown Victoria
10 Great Deals out of 1,220 listings starting at $1,700
Used Lincoln Town Car
30 Great Deals out of 2,080 listings starting at $1,995
Used Chevrolet Impala
796 Great Deals out of 34,383 listings starting at $799
Used Mercury Marauder
35 listings starting at $7,998
Used Chrysler 300
404 Great Deals out of 22,152 listings starting at $1,000
Used Chevrolet Tahoe
778 Great Deals out of 28,448 listings starting at $1,500
Used Ford F-150
2,702 Great Deals out of 211,804 listings starting at $1,000
Used Cadillac DeVille
6 Great Deals out of 1,954 listings starting at $1,750
Used Ford Taurus
256 Great Deals out of 20,485 listings starting at $1,500
Used Honda Accord
811 Great Deals out of 81,609 listings starting at $899
Used Ford Mustang
364 Great Deals out of 44,400 listings starting at $1,000
Used Toyota Camry
1,103 Great Deals out of 96,275 listings starting at $1,250

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
33 listings starting at $3,900
2010 Mercury Grand Marquis For Sale
5 Great Deals out of 112 listings starting at $2,999
2009 Mercury Grand Marquis For Sale
3 Great Deals out of 108 listings starting at $2,998
2008 Mercury Grand Marquis For Sale
8 Great Deals out of 175 listings starting at $2,995
2007 Mercury Grand Marquis For Sale
4 Great Deals out of 160 listings starting at $2,400