Keep the steering linkage tight and precise with the Mevotech Supreme Steering Idler Arm MS40971. It installs as a direct-fit replacement for the front steering of the 2011-2023 Ford F-250 Super Duty and 2011-2023 Ford F-350 Super Duty (see the Buyer's Guide tab for engine-specific coverage). The idler arm pivots and supports one end of the center link, working opposite the pitman arm to locate the linkage and help hold the tie rods in proper alignment.
Superior toughness: patented sintered bearings are designed for longer-lasting performance.
Simple to service: an SAE grease fitting is included for quick, on-vehicle lubrication.
Resists corrosion: a protective surface treatment helps prevent rust build-up and adds longevity.
Premium materials: quality components are used throughout for longer part life, and each design goes through extensive in-house and third-party durability testing.
Signs this idler arm may need replacing include loose or wandering steering, excess play at the wheel, and uneven front-tire wear. If a worn idler arm is the cause, this unit replaces it. Inspect and service the mating steering components as directed by the vehicle service procedure.
Interchange: 620-498448
620498448 · 19423774 · TA5783 · BC3Z3A034A · HC3Z3350A · K400026 · K400027 · FA5058E · 29064037 · X15ID0001
This part cross-references / interchanges with the following part numbers:
What vehicles does the Mevotech MS40971 idler arm fit?
It's a direct-fit front-steering replacement for the 2011-2023 Ford F-250 Super Duty and 2011-2023 Ford F-350 Super Duty. Check the Buyer's Guide tab for engine-specific coverage.
What does a steering idler arm do?
It pivots and supports one end of the center link, working opposite the pitman arm to locate the steering linkage and help keep the tie rods in proper alignment.
What are the signs of a worn idler arm?
Loose or wandering steering, excess play at the steering wheel, and uneven front-tire wear are common signs. Have the steering diagnosed to confirm the idler arm is the cause.
Does the MS40971 include a grease fitting?
Yes. It comes with an SAE grease fitting for quick, on-vehicle lubrication, and it uses patented sintered bearings for longer-lasting performance.
Does this idler arm resist corrosion?
Yes. A protective surface treatment helps prevent rust build-up and adds longevity, and premium components are used throughout for longer part life.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
