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We stock Oxygen Sensor parts for most Mercury models, including Cougar, Grand Marquis, Mountaineer, Sable, Villager.

Delphi
2011 Mercury Mariner Oxygen Sensor Delphi

P311-4CD6C50    New

Qty:
$83.48
Delphi Oxygen Sensor
  • Rearward
Brand: Delphi
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Vehicle
2011 - Mercury Mariner
Delphi
2011 Mercury Mariner Oxygen Sensor Delphi

P311-4CD6C50    New

Qty:
$83.48
Delphi Oxygen Sensor
Brand: Delphi
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Vehicle
2011 - Mercury Mariner
Delphi
2011 Mercury Milan Oxygen Sensor Delphi

P311-4CD6C50    New

Qty:
$83.48
Delphi Oxygen Sensor
  • Forward
Brand: Delphi
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Vehicle
2011 - Mercury Milan
Motorcraft
1996 Mercury Tracer Oxygen Sensor Motorcraft

P311-17EF8A1    New

Qty:
$52.56
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Front
Brand: Motorcraft
This Product is Eligible for Free Ground Shipping
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Vehicle
1996 - Mercury Tracer
Motorcraft
1996 Mercury Cougar Oxygen Sensor Motorcraft

P311-17EF8A1    New

Qty:
$52.56
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Part Marked F5MF 9F472-AA
  • Front
Brand: Motorcraft
This Product is Eligible for Free Ground Shipping
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Vehicle
1996 - Mercury Cougar
Motorcraft
1996 Mercury Sable Oxygen Sensor Motorcraft

P311-38A4B24    New

Qty:
$63.44
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Part Marked F5MF9F472BA
Brand: Motorcraft
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Additional Fitment Information:
Vehicle
1996 - Mercury Sable
Motorcraft
1996 Mercury Cougar Oxygen Sensor Motorcraft

P311-38A4B24    New

Qty:
$63.44
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Part Marked F5MF 9F472-B1B
Brand: Motorcraft
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Additional Fitment Information:
Vehicle
1996 - Mercury Cougar
Motorcraft
1996 Mercury Grand Marquis Oxygen Sensor Motorcraft

P311-38A4B24    New

Qty:
$63.44
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Part Marked F5MF9F472BA o rF5MF9F472B1B
Brand: Motorcraft
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Additional Fitment Information:
Vehicle
1996 - Mercury Grand Marquis
Motorcraft
1997 Mercury Grand Marquis Oxygen Sensor Motorcraft

P311-38A4B24    New

Qty:
$63.44
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Part Marked F5MF9F472B1B
Brand: Motorcraft
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Additional Fitment Information:
Vehicle
1997 - Mercury Grand Marquis
Motorcraft
1999 Mercury Sable Oxygen Sensor Motorcraft

P311-38A4B24    New

Qty:
$63.44
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Except California Emissions System and

    with Part Marked
    F5MF 9F472-BA
Brand: Motorcraft
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Additional Fitment Information:
Vehicle
1999 - Mercury Sable
Motorcraft
2004 Mercury Sable Oxygen Sensor Motorcraft

P311-501A857    New

Qty:
$68.32
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
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Additional Fitment Information:
Vehicle
2004 - Mercury Sable
Motorcraft
1996 Mercury Sable Oxygen Sensor Motorcraft

P311-501A857    New

Qty:
$68.32
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Part Marked F6DF9G444E1A or F6DF9G444E2A
Brand: Motorcraft
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Additional Fitment Information:
Vehicle
1996 - Mercury Sable
Motorcraft
1999 Mercury Sable Oxygen Sensor Motorcraft

P311-501A857    New

Qty:
$68.32
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Part Marked F6DF9G444E2A or F6DF9G444EA
Brand: Motorcraft
Free Ground Shipping on this item
Additional Fitment Information:
Vehicle
1999 - Mercury Sable
Motorcraft
1998 Mercury Sable Oxygen Sensor Motorcraft

P311-501A857    New

Qty:
$68.32
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Part Marked F6DF9G444E1A or F6DF9G444E2A or F6DF9G444EA
Brand: Motorcraft
Free Ground Shipping on this item
Additional Fitment Information:
Vehicle
1998 - Mercury Sable
Motorcraft
1994 Mercury Cougar Oxygen Sensor Motorcraft

P311-05967BF    New

Qty:
$64.39
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Free Ground Shipping on this item
Additional Fitment Information:
Vehicle
1994 - Mercury Cougar
Motorcraft
2006 Mercury Mountaineer Oxygen Sensor Motorcraft

P311-25B399A    New

Qty:
$66.30
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Free Ground Shipping on this item
Additional Fitment Information:
Vehicle
2006 - Mercury Mountaineer
Motorcraft
1997 Mercury Mountaineer Oxygen Sensor Motorcraft

P311-0FEE8DB    New

Qty:
$48.43
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle
1997 - Mercury Mountaineer
Motorcraft
1997 Mercury Mountaineer Oxygen Sensor Motorcraft

P311-5DCB5A4    New

Qty:
$50.40
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle
1997 - Mercury Mountaineer
Motorcraft
2005 Mercury Mountaineer Oxygen Sensor Motorcraft

P311-43D68A0    New

Qty:
$76.98
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Free Ground Shipping on this item
Additional Fitment Information:
Vehicle
2005 - Mercury Mountaineer
Motorcraft
1999 Mercury Mountaineer Oxygen Sensor Motorcraft

P311-1986426    New

Qty:
$67.77
Motorcraft Oxygen Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Front
Brand: Motorcraft
Free Ground Shipping on this item
Additional Fitment Information:
Vehicle
1999 - Mercury Mountaineer

Latest Mercury Repair and Oxygen Sensor Installation Advice

CarJunky AutoAdvice

oxygen sensors

Showing 7 out of 7 Posts
Question From scottie54 on oxygen sensors

I recently had to replace my speed sensor on my 1998 mercury V-6 sable and that took care of the speedometer and the transmission not shifting problem.Unfortunately I damage the wires on the top oxygen sensor firewall side and I had to replace it.Everything work fine for 4 days then the service light came on and a code PO135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) and I think that is the same one I replaced.That sensor is next to the speed sensor and there is no room at all and when you are fighting installing that y-pipe exhaust it is very difficult not to nick those wires.My questions are:Is Bank 1 Sensor 1 the top sensor on the firewall side? Is there a way to check the wiring at the plug with my fluke meter?Also has anybody have any experience replacing that type of close fitting O2 sensor,I would like to see if there a easier and safe way to do this with out pulling of that stupid y-pipe and possibly nicking the wires again?

Response From tcwagner

Dear O2,
Sad to say, there is a failure rate on O2 sensors. I had a quality one (from Napa) put in and it failed 100 miles later. They made it good, but I was in the middle of nowhere in WV mtns. when it went again. Yeah. You may not have nicked the wire, it could have just failed. I don't know if it would help on your model, but an experienced Plymouth mechanic told me that if you floor it and it runs fine, it is probably not the o2 sensor, since the computer ignores it under full acceleration. Maybe Jim could tell you more. He is a helpful guy for sure.
Terry

Response From dmac0923

bank 1 i believe is the drivers side. so bank 1 sensor 1 would be on the drivers side in between the exhaust manifold and cat converter

Response From scottie54

Thanks for your reply dmac0923,and I agree bank 1 sensor 1 is the top sensor but I have a DOHC V-6 and someone else said it was the firewall side but I'm not sure.

Response From way2old

Very good Jim.


Response From Double J

Bank 1 is the bank that contains the number 1 cylinder,sensor 1 is the sensor before the cat/con.
I believe the #1 cylinder is the bank closest to the firewall on this model.

Response From Double J Top Rated Answer

THANK YOU


1996 Mercury Cataylic converter rattle

Showing 3 out of 27 Posts | Show 24 Hidden Posts
Question From mercuryman on 1996 Mercury Cataylic converter rattle

I have a 1996 Mercury Grand Marquis, and replaced the cataylic converter last summer. It has a loud rattle noise.It is NOT a heat shield.

I read a post about drilling a hole in it? Sounds crazy to ruin a fairly new cc.
I also noticed the adapter cable is broken off the screw on the side of the converter. Would that have anything to do with it making noise?

Response From Hammer Time

Does the Catalyst rattle if you hit it with the heel of your hand?

Response From mercuryman

Does the Catalyst rattle if you hit it with the heel of your hand?


Yes the Catalyst rattled with the car off, and hit it with my hand.

Response From Hammer Time

So, it needs to be replaced. The substrate is broken.

If it was replaced last summer, it should be under warranty.

Response From Discretesignals

I also noticed the adapter cable is broken off the screw on the side of the converter.

Not sure what you mean here.

Response From Discretesignals

Does it look like this?

Response From mercuryman

I also noticed the adapter cable is broken off the screw on the side of the converter.

Not sure what you mean here.

There is a light green wire with plug-in adapter that has a silver jack plug in on the end that goes into the nut on the side of the cataylic converter. It is broken on the end that goes into CC.

Response From mercuryman

Does it look like this?




Yes that's it.

Response From Discretesignals

That is the oxygen sensor. Your check engine light must be on.

If the front 02 sensor isn't working, that could damage your catalyst. The computer needs the signal from the front O2 sensor to be able to trim the fuel to air ratio for proper converter operation.

How long has it been like that?

Response From Discretesignals

You'll probably need to replace the damaged O2 sensor. Then you will probably need another catalytic converter because it may have gotten toasted. Then it would be important to clear the trouble codes from the PCM and then see if any come back.

Response From mercuryman Top Rated Answer

That is the oxygen sensor. Your check engine light must be on.

If the front 02 sensor isn't working, that could damage your catalyst. The computer needs the signal from the front O2 sensor to be able to trim the fuel to air ratio for proper converter operation.

How long has it been like that?
Not sure. I had no reason to go under the car except for oil change, cause the car has not had any trouble since August of last year. I took out the bulb from the dash, so I would not see any check engine light over 3 years ago.

Response From mercuryman

OK I will replace the sensor, and see what else I can do to quiet the car down. 280,000 miles, and it was so quiet until the cat converter starting screaming.

Response From Discretesignals

If you replace just the sensor and the catalyst substrate has come apart or melted, you really don't want to be putting a new sensor in that environment.

Response From MarineGrunt

I took out the bulb from the dash, so I would not see any check engine light over 3 years ago.


That reminds me of an episode of The Simpons where Homer's piece of black electrical tape that he put over the check engine light fell off. He said "whoops", put it back on and said something like, "who needs a mechanic, the car is good as new again".


Now if they put something like that in a cartoon comedy it proves how idiotic it is to ignore and even go as far as to take the bulb out or cover the light with electrical tape. When the check engine light is on your car is telling you that something is wrong. Many times, if ignored, it will end up costing you more money in the long run. If one thing is malfunctioning it could cause other issues and even possible engine damage.

I'm really surprised you bit your tongue HT! You too DS! Normally you guys would be all over something like that.

Response From Hammer Time

I'm really surprised you bit your tongue HT!

You can see what we're dealing with here. I'm concluding the whole effort is just a waste.

Response From MarineGrunt

I am really surprised HT didn't fire up his flame thrower though...lol

lol.....I can only imagine what words of wisdom he had going through his head. You know he instantly had his fingers on the keyboard ready to fire away and at the last second said the heck with it.


You can see what we're dealing with here. I'm concluding the whole effort is just a waste.

You know, by the time he tore the cluster out and pulled the bulb it probably would've been easier and quicker to get the codes scanned and replace a faulty part.

Response From Discretesignals

For all we know he could of drilled a hole through the cluster faceplate and ripped the bulb out with a pair of needlenose.

Response From Hammer Time

I can do it through the tailpipe.

Response From nickwarner

You mean there's another way to do that? Boy now I feel dumb.

Response From Discretesignals

Please tell me you don't do that with your lips or something along those lines...

Response From Discretesignals

Not yet, but I am sure i'll be getting them in my life time though. You know it is bad when your getting a prostrate exam and you see both hands on your shoulders.

Response From Hammer Time

Haven't you ever had a colonoscopy?

Response From Discretesignals

I thought about it MG, but why even bother. If the owner doesn't want to figure out or fix the problem that is causing the light to come on and wants to disconnect it, that is their problem not mine.

I am really surprised HT didn't fire up his flame thrower though...lol

Response From Hammer Time

OK I will replace the sensor, and see what else I can do to quiet the car down. 280,000 miles, and it was so quiet until the cat converter starting screaming.



If you think the noise is your only problem, then just turn the radio up. The noise isn't the issue here. The broken catalyst is.

Response From Discretesignals

I did the same thing. I knew it would be useless to even go down that road.

Response From Hammer Time

I took out the bulb from the dash, so I would not see any check engine light over 3 years ago.


I'm gonna bite my tongue.........................

Response From mercuryman

hi Hammer
I will go out in a while, and try that. Post again shortly. Thanks.

Engine Soon:Mercury Topaz 1994

Showing 2 out of 3 Posts | Show 1 Hidden Posts
Question From scyr on Engine Soon:Mercury Topaz 1994

Hello,

My old car is having some age and needs a computer checkup for an error on the dash board saying Engine Soon. The problem just show up this month and happen in the morning of wet weather or rainy day. The light will disappear when the engine is hot,dry and driving at the same time. The light will most likely show up when engine is idle,cold in wet weather. This is summer. I don't want to see this fall.

Before going to the garage and believing those mechanics. What could be the problem? it sound to me a sensor. May the oxygen sensor or the thermostat getting faulty.

This sound a common problem on those model , especially for car sleeping in the garage moist temperature. My car is sleeping outside. Any mechanic went in this situation before? Please assist and remember I am not a mechanic, please be detail and patient.


Mercury Topaz 1994
2.3 L , 5 speeds
160 000 km

Response From way2old Top Rated Answer

Hello. First, click here and see if you can retrieve the trouble codes. Then scroll down to see what the code meaning. This is a starting point only. Please post back with your results and we can help you more. Welcome to our forum.

Response From scyr

Hello,

Thank you for the reply.

The good news, the engine soon disappear by itself for the last week and a half.

What I did so far.
Get the haynes repair manual for this car.
as you told me use a voltmeter to find the trouble code.

to make sure it was hookup ok:
I used a mastercraft digital meter set to 20 DC Volts and used gauge 14 electric wire.
I followed the schema and make sure each connection were ground properly in pin or at the battery.
when key is off position, I get 12.50 volts on meter. telling me it ground ok all place. if I took off the probe from the plus battery meter come to 0 volt

for reading on digital meter , I only use the last 2 digits after the dots,when set to 20 v dc.

Ok so far, but the problem start now because I don't get the same answer

when ignition key turn on,engine off I end with code 59,61,62. it is not constant when I repeat the steps every 5 mins. That is what is tricking me to give the accurate reading.

when engine turn on. I got the code 14 steady. When I try back later 14 never came back at all and switch to 19 or 21

in conclusion I will have to wait until engine soon come more often. and needs the help of a mechanic to get the accurate reading.

according to the book.
19 erratic idle speed or signal when engine is on.

if 19 or 20 ,that is the right problem, I think only the dealer could fix it with his computer tools.

Idle Problems 2001 Mercury Cougar

Showing 2 out of 2 Posts
Question From jowhite38804 on Idle Problems 2001 Mercury Cougar

Engine Mechanical problem
2001 Mercury Cougar 6 cyl Front Wheel Drive Automatic 132000 miles

When the car is in park it idles at around 300 to 400 rpm, spits and sputters, and tries to go dead. While driving it still sputters when you give it gas.The catyletic converter and oxygen sensors were replaced about a year ago. Could this problem be the fuel pump or filter? Its so bad now that we dont attempt to drive it.

Response From Tom Greenleaf Top Rated Answer

Was everything fine when the coverters and O2 sensors were replaced? How long has it been running lousy like this? You can kill new stuff too driving it too long when not running well.

This needs some diagnosis for why it doesn't run well now, code reading and inspection for vacuum leaks, plugs and wires, tune-up items thru out including a new fuel filter,

T