Ford Lincoln Mercury Parking Assist Sensor 4 Piece Set - 1ABMK00171

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Part Details

  • Quantity:   4 Piece Set

These rear parking assist sensors are new, aftermarket replacement parts. These are direct replacements for damaged or malfunctioning sensors. These are the sensors that mount in the rear bumper cover, and work with your vehicle's rear parking assist system.


  • Comes as a SET of 4
  • Replaces dealer part numbers: 3F2Z-15K859-BA, 4F23-15K859-AA, 3F2Z15K859BA, 4F2315K859AA
  • Direct replacements
  • Built to strict quality control standards
  • Correct connectors for easy replacement

If your rear parking assist system is not working properly due to a defective sensor, or more sensors have been damaged in a collision then these sensors are the solution for you.

These rear parking assist sensors make great replacements, and have good cost savings over the price of dealer parts.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm -

Lifetime Warranty

This item is backed by our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will replace the part free of charge.

  1. step : Removing the Tail Light (0:28)
    • Remove the two 7mm bolts on either side of the inside bottom bumper
    • Remove the two 8mm bolts that hold the tail light
    • Turn the sockets counterclockwise
    • Remove the tail light
  2. step : Removing the Bumper Cover (1:20)
    • Remove the 10mm bolt on the bumper
    • Remove the 8mm bolt on the side of the bumper
    • Remove the nine tabs on the bumper with a flat blade screwdriver
    • Lift up on the bumper and pull the bumper off
    • Disconnect the parking sensors
  3. step : Removing the Sensor (2:50)
    • Remove the three 13mm speed nuts on the bumper
    • Remove the Styrofoam pad from the bumper
    • Lift the Styrofoam from the bumper cover
    • Pry the tabs out with a flat blade screwdriver
    • Pull the sensors out of the bumper
    • Disconnect the wiring harnesses from the sensor
    • Remove the sensor
  4. step : Installing the Sensor (4:14)
    • Press the sensor into the bumper
    • Connect the wiring harness to the sensor
    • Press the Styrofoam padding into the bumper
    • Tighten the three 13mm speed nuts to the bumper
  5. step : Installing the Bumper Cover (5:34)
    • Connect the sensor lead
    • Lift the bumper up into place
    • Press the nine tabs into the bumper
    • Tighten the 8mm bolts to the bumper sides
    • Tighten the 10mm bolts to the bumper sides
  6. step : Installing the Tail Light (6:54)
    • Insert the largest connector to the bottom of the tail light
    • Insert the white connector to the middle of the tail light
    • Insert the last connector to the top
    • Line the tail light into the stud holes
    • Press the tail light into place
    • Tighten the 8mm bolts that hold the tail light in place
    • Tighten the 7mm bolts to the bottom of the bumper

Tools needed for replacement:

    Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Sockets - Metric

  • 7mm Socket
  • 8mm Socket
  • 10mm Socket
  • 13mm Socket

3.79/ 5.0
14 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Easy install
The dealer got me for over $250 last time a (1) sensor went out. I got wise this time around. I spent $50 bucks and got a set of 4. I replaced the one bad sensor (with the help of 1a video)in under two minutes and I now have three spares for the next time one goes out.
January 22, 2017
It`s great!
I like it. It was a perfect fit for my 04 F150. On the down side I couldn`t find any pigtails for it here. But was way cheaper than letting Ford fix it!
January 26, 2017
Sensors do not work. If something seems like a bargain - its not!
Installed 4 new sensors at a great price. Tested units with engine off. Only 1 sensor worked with a metal object (keys in hand). When backing up, sytems beeps rapidly. Changes to solid tone when you hit something (curb). Today sytem stopped working altogether - stays off. Waste of money - lesson learned! 2001 Ford F-350 Crew Cab Dually.
February 19, 2017
Wish I could buy individually
As I only needed 1 sensor I wish I could have purchased individually instead of packs of 4. Installed quickly and worked right away.
March 29, 2017
Videos are right on
Great product at a reasonable price. Delivered quickly. Followed the How To Videos, turned out to be easier than I thought it would be. The bonus being that I saved quite a few dollars as well. Would highly recommend. GJF
August 12, 2017
Exact Fit, Excellent Price
Will always shop at 1A Auto. Local dealership wanted $200.00 each and even with shipping costs to Canada, still a great deal!
January 8, 2018
Great buy for the money
I had sensors that would work intermittently. The dealership wanted almost $200.00 just for the sensors. I bought them from 1A Auto for less than $60.00, spent less than 30 minutes replacing mines and have not had any issues with them since. I was able to determine which of mines had the shorts in them and I now have 2 additional ones for future use (hopefully I wont need them). I couldnt be happier.
February 24, 2018
Sensors dont hold up
I purchased the parking assist sensor kit less than a year ago. These have worked great, but about 2 or 3 weeks ago, they failed and I am getting a Check Parking Assist error. I purchased these based on the economical price and the assurances posted on your website that these were quality parts. It would be foolish for me to keep ordering from you if there is a possibility going forward, that your parts will only last less that a year.
July 19, 2018
I am happy to report that they worked perfect! Way to go A-1.
September 3, 2018
Not worth buying
These do not work consistently I will end up biting the bullet and going to Ford to get Factory ones I would not recommend buying these
September 7, 2018
First Order
This was my first order and so far all has good excellent, I have received the sensors but have no yet installed them but will be doing so soon. I am a happy customer so far. Cheers
November 16, 2018
excellent service and install video
excellent price and fast shipping. the installation video online was great. easy to install.system back up and working great.
February 6, 2019
Fixed them sensors
They came in quick and save me a bunch. Great fit and looks great
February 21, 2019
Do not buy
They dont work at all. They give a constant alarm. Complete waste of $52.
February 27, 2019
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
are these self contained then and the warning noise would be inside them and not in the van near the driver?
Karen M March 8, 2016
They are not self contained, but simply a sealed sensor. The beeping sound the driver hears comes from a small speaker under the dash, so the beep is heard inside the vehicle
Dave S March 8, 2016
They make no noise on their own. These sensors are complete factory replacement units and plug into factory connections. They dont operate independently but rather send information to activate the factory in cab audible warning system as it was originally in your vehicle.
Alan F March 8, 2016
No the warning sound is inside the van. The faster the sound the closer you are to thr object behind you
Mike M March 8, 2016
The sensors themselves dont make a sound. The sound still comes from where it came from before. These just replace a worn out or damaged exterior sensor.
Remington M March 8, 2016
the sound is inside on my truck. hope this helps
Lynn S March 9, 2016
The sensor will activate the warning noise in the vehicle. The assumption is that you are installing it on a vehicle that uses that sensor
Doug M March 9, 2016
No, these are replacement sensors for the factory installed backup warning system. They are sensors only.
Nicholas M March 9, 2016
All you need is to plug `em in. Provided it is a factory accessory on your vehicle, it will chime in the cab. Very cool.
DANIEL B January 26, 2017
Year Make Model Description
2007-2009Ford E150 Van Ford E150 Van Parking Assist Sensor 4 Piece Set
2007-2009Ford E250 Van Ford E250 Van Parking Assist Sensor 4 Piece Set
2007-2009Ford E350 Van Super Duty Ford E350 Van Super Duty Parking Assist Sensor 4 Piece Set
2001-2009Ford Escape Ford Escape Parking Assist Sensor 4 Piece Set
2003-2006Ford Expedition Ford Expedition Parking Assist Sensor 4 Piece Set
2002-2006Ford Explorer Ford Explorer Parking Assist Sensor 4 Piece Set
2007-2009Ford Explorer Sport Trac Ford Explorer Sport Trac Parking Assist Sensor 4 Piece Set
2004Ford F150 Truck Ford F150 Truck New Body Style Parking Assist Sensor 4 Piece Set
2005-2008Ford F150 Truck Ford F150 Truck Parking Assist Sensor 4 Piece Set
2001-2011Ford F250 Super Duty Truck Ford F250 Super Duty Truck Parking Assist Sensor 4 Piece Set
2001-2011Ford F350 Super Duty Truck Ford F350 Super Duty Truck Parking Assist Sensor 4 Piece Set
2004-2007Ford Freestar Ford Freestar Parking Assist Sensor 4 Piece Set
2001-2003Ford Windstar Ford Windstar Parking Assist Sensor 4 Piece Set
2002Lincoln Blackwood Lincoln Blackwood Parking Assist Sensor 4 Piece Set
2006-2008Lincoln Mark LT Lincoln Mark LT Parking Assist Sensor 4 Piece Set
2001-2002Lincoln Navigator Lincoln Navigator Parking Assist Sensor 4 Piece Set
2005-2009Mercury Mariner Mercury Mariner Parking Assist Sensor 4 Piece Set
2004-2007Mercury Monterey Mercury Monterey Parking Assist Sensor 4 Piece Set
2002-2006Mercury Mountaineer Mercury Mountaineer Parking Assist Sensor 4 Piece Set
Part 1ABMK00171
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