Ford ABS Speed Sensor with Harness Dorman 970-021 - 1AERK00122

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These replacement ABS (Anti-Lock Brake) Sensors with harnesses are just what you need to get your vehicle's ABS system in good operating condition again!

A bad, corroded, frayed, or malfunctioning ABS sensor can cause an ABS light to illuminate on your instrument panel, and store an ABS diagnostic error code. If your ABS sensor or wiring harness is corroded or damaged it will prevent your ABS sensor, and ABS system from working properly.


  • Comes as a PAIR
    • Fits both the LH (Driver Side) & RH (Passenger Side) FRONT WHEEL
  • Includes Harnesses with Plugs
  • Correct connectors and wire length
  • Built to strict quality control standards
  • Replaces dealer part numbers: F81Z 2C204 BB, F81Z2C204BB
  • Direct replacements
  • 100% electrically factory tested
  • Plugs into existing body mounted ABS harness
    • No Splicing needed
  • Fits 4WD models only as listed per applications


Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

Attention California Customers:

WARNING:  This product can expose you to chemicals including Acrylonitrile, which is known to the State of California to cause cancer.  For more information, go to

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Wheel (1:24)
    • Remove the hub cap with a flat blade screwdriver
    • Loosen the lug nut covers with a 21mm socket
    • Pry off the center cap with a flat blade screwdriver
    • Loosen the lug nuts with the vehicle on the ground
    • Raise the vehicle with a floor jack
    • Secure the vehicle on jack stands
    • Remove the lug nuts
    • Pull off the wheel
  2. step : Removing the Caliper Bracket (1:15)
    • Remove the 17mm bolts from the brake caliper
    • Pry the brake pads into the caliper with a flat blade screwdriver to push in the pistons
    • Remove the caliper
    • Remove the two springs
    • Pry the brake pads off with a flat blade screwdriver
    • Remove the two 21mm bolts on the back of the caliper bracket
    • Remove the bracket
    • Remove the rotor
    • Use a hammer to remove the rotor if needed
  3. step : Removing the ABS Sensor and Harness (3:28)
    • Remove the 5mm Allen bolt with an Allen wrench
    • Lift up on the metal tab and pull the wheel speed sensor up and out
    • Remove the 8mm bolt from the ABS sensor
    • Pull the ABS harness from the clips, use a flat blade screwdriver to pry open the clips
    • Disconnect the harness from the inner fender
  4. step : Installing the New ABS Sensor and Harness (4:44)
    • Connect the ABS harness
    • Re-clip the harness and push the clips back into their brackets
    • Re-clip the harness near the inner fender
    • Apply lubricant to the outside of the sensor
    • Replace tighten the 5mm Allen bolt and the 8mm bolt
  5. step : Installing the Caliper (7:00)
    • Replace the rotor
    • Put the caliper bracket on the rotor
    • Replace and tighten the 21mm bolts
    • Torque the 21mm bolts to 100 ft/lbs
    • Install the new brake pads into the bracket
    • Replace the springs
    • Place the caliper onto the bracket
    • Replace and tighten the 17mm bolts
    • Torque the bolts to 60 ft/lbs
  6. step : Reinstalling the Wheel (8:37)
    • Slide the wheel into place
    • Start the lug nuts by hand
    • Tighten the lug nuts preliminarily
    • Lower the vehicle to the ground
    • Tighten the 21mm bolts
    • Tighten the lug nuts to 100 ft/lbs in a crossing or star pattern
    • Reattach the center cap
  7. step : Testing the Brakes (9:34)
    • Pump your brakes repeatedly until they feel firm
    • Test your brakes at 5 miles per hour and then 10 miles per hour
    • Road test the vehicle

Tools needed for replacement:

    Allen Wrenches

  • 5mm Allen Wrench

  • General Tools

  • Large C-Clamp

  • Ratchets & Related

  • A Piece of Pipe (for leverage)
  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 17mm Socket
  • 21mm Socket
  • 8mm Socket

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Year Make Model Description
2000-2005Ford Excursion Ford Excursion 4 Wheel Drive ABS Speed Sensor with Harness Front Pair Dorman 970-021
1999Ford F250 Super Duty Truck Ford F250 Super Duty Truck 4 Wheel Drive ABS Speed Sensor with Harness Front Pair Dorman 970-021
2000-2004Ford F250 Super Duty Truck Ford F250 Super Duty Truck 4 Wheel Drive ABS Speed Sensor with Harness Front Pair Dorman 970-021
1999-2004Ford F350 Super Duty Truck Ford F350 Super Duty Truck 4 Wheel Drive ABS Speed Sensor with Harness Front Pair Dorman 970-021
Only 4 left in stock
Part #: 1AERK00122

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

Brand #: 970-021

How-to Video:

(10:02 min)