Idler Arm

This procedure covers the removal and replacement of the idler arm on a 2018-2024 Honda Accord with the 1.5L turbo engine, restoring proper steering geometry and eliminating play in the steering system.

Warnings

Tools required

Parts

• Idler arm assembly × 1 — Use OEM Honda part or quality aftermarket equivalent
• Cotter pin (if applicable to tie rod connection) × 1 — 2mm x 20mm

Preparation

1. Park vehicle on level ground and engage parking brake
2. Place wheel chocks behind rear wheels
3. Loosen front wheel lug nuts while vehicle is on the ground (do not remove)
4. Raise front of vehicle with floor jack and support securely on jack stands under the chassis rails
5. Remove front wheels completely
6. Ensure ignition is OFF and key is removed to prevent accidental power steering system activation
7. Spray penetrating oil on all fasteners to be removed and allow 10-15 minutes to soak

Procedure

1. 1

   Access the steering components
   Remove the engine under cover if equipped. Remove the cover screws using a 10mm socket. Set the cover aside in a clean area to prevent damage.
2. 2

   Locate the idler arm assembly
   Identify the idler arm assembly on the steering rack. On this platform, the idler arm typically refers to the steering rack support bracket or mounting assembly on the passenger side of the vehicle. Inspect the component for wear, cracks, or excessive play before proceeding.
3. 3

   Disconnect tie rod connection if necessary
   If the idler arm assembly includes a tie rod connection, remove the castle nut or tie rod nut securing the tie rod end. Remove the cotter pin first if equipped. Use a 17mm wrench to hold the tie rod end and a 17mm socket to remove the nut. Use a ball joint separator or tie rod puller to separate the tie rod from the steering knuckle.
   ⚠Do not strike the tie rod end threads with a hammer as this will damage the threads and make reinstallation difficult.
4. 4

   Remove idler arm mounting bolts
   Locate the bolts securing the idler arm to the subframe or chassis. Use a 14mm socket and wrench to remove the idler arm bolts. Support the assembly with one hand while removing the final bolt to prevent it from falling.
5. 5

   Remove the idler arm assembly
   Carefully lower and remove the idler arm assembly from the vehicle. Note the orientation and position of any spacers, washers, or alignment shims for proper reinstallation. Inspect the mounting points on the subframe for damage or corrosion.
6. 6

   Clean mounting surfaces
   Use a wire brush to clean the mounting surfaces on the subframe where the idler arm attaches. Remove any rust, dirt, or old thread-locking compound. Ensure the surfaces are clean and flat for proper seating of the new component.
7. 7

   Install new idler arm assembly
   Position the new idler arm assembly in place, ensuring proper orientation matches the original installation. Install any spacers or shims in their original positions. Start all mounting bolts by hand to ensure proper thread engagement before tightening.
8. 8

   Torque idler arm mounting bolts
   Using a torque wrench, tighten the idler arm bolts to specification in a cross-pattern if multiple bolts are present. This ensures even seating and proper load distribution across the mounting surface.
9. 9

   Reconnect tie rod end if applicable
   If the tie rod end was disconnected, clean the tapered seat in the steering knuckle. Install the tie rod end into the knuckle and install the nut. Tighten to specification using a torque wrench. Install a new cotter pin if applicable, ensuring it passes through the castle nut slots and tie rod end hole.
10. 10

    Reinstall engine under cover
    Position the engine under cover and install all cover screws. Tighten the screws to specification in a sequential pattern to ensure even clamping force.
11. 11

    Reinstall wheels
    Mount the front wheels and install lug nuts by hand. Lower the vehicle until the tires just touch the ground to prevent wheel rotation. Torque the lug nuts to specification in a star pattern to ensure even wheel seating.

Reassembly

1. Ensure all fasteners are torqued to specification using a calibrated torque wrench
2. Verify all cotter pins are properly installed and bent to prevent loosening
3. Double-check that no tools or parts were left in the wheel well or under the vehicle

Verification

• Start the engine and turn the steering wheel lock-to-lock while stationary to check for any binding or unusual noises
• Perform a visual inspection under the vehicle to confirm all components are properly secured
• Test drive the vehicle at low speed in a safe area, checking for proper steering response and any vibration or wandering
• Schedule a professional wheel alignment as soon as possible, as any steering component replacement affects alignment settings
• After 50-100 miles of driving, re-torque all fasteners and inspect for any loosening or abnormal wear

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