Brake Rotor - Front Single

This procedure covers removal and replacement of a single front brake rotor on a 2018-2024 Honda Accord with 1.5L turbo engine, including caliper removal and proper torque procedures.

Warnings

Tools required

Parts

• Front brake rotor × 1 — Use OEM Honda part or quality aftermarket equivalent
• Rotor set screw × 1 — 90155-SDA-A00 or equivalent (if reusing damaged)

Preparation

1. Park vehicle on level, solid surface and engage parking brake firmly
2. Chock rear wheels securely to prevent rolling
3. Open hood and check brake fluid reservoir level - if near MAX line, remove some fluid to prevent overflow when compressing caliper piston
4. Loosen wheel lug nuts on the front wheel being serviced while vehicle is still on ground (do not remove)
5. Lift front of vehicle with floor jack at designated jacking point (see owner's manual for location on front subframe)
6. Place jack stand under frame rail or manufacturer-specified support point
7. Gently lower vehicle onto jack stand and verify stability before proceeding
8. Remove wheel lug nuts completely and remove wheel

Procedure

1. 1

   Inspect brake system and clean work area
   Visually inspect the brake caliper, brake hose, and surrounding components for damage, leaks, or excessive corrosion. Spray brake parts cleaner liberally on the caliper, rotor, and bracket assembly. Wipe clean with shop towels. Do not use compressed air to blow off brake dust.
2. 2

   Remove caliper slide pin bolts
   Locate the two caliper slide pin bolts on the rear side of the caliper (12mm heads). Using a 12mm socket, remove both slide pin bolts completely. Note the condition of the bolts and slide pins - these should move smoothly and be well-greased.
3. 3

   Remove caliper and support properly
   Carefully pivot the caliper assembly upward and off the rotor. Do NOT disconnect the brake hose. Immediately support the caliper using wire, a bungee cord, or by resting it on a suspension component. Ensure there is no tension or weight on the brake hose. The caliper must remain supported throughout the remainder of this procedure.
   ⚠️Never allow the caliper to hang by the brake hose alone. Hose damage can cause complete brake failure.
4. 4

   Remove caliper bracket bolts
   Locate the two caliper bracket bolts (17mm heads) that secure the bracket to the steering knuckle. These bolts are very tight. Using a 17mm socket with breaker bar if necessary, remove both caliper bracket bolts completely. Keep these bolts as they will be reused.
5. 5

   Remove caliper bracket
   Remove the caliper bracket assembly from the steering knuckle. Inspect the bracket for cracks or damage. Clean the bracket thoroughly with brake parts cleaner, paying special attention to the pad slide areas.
6. 6

   Remove rotor set screw
   Locate the small Phillips head set screw on the face of the brake rotor. Using a Phillips screwdriver, remove this screw. Note: This screw is often corroded and may strip or break - this is acceptable as the rotor is held by wheel lug nuts during normal operation, not this screw. If it strips, you may need to drill it out.
7. 7

   Remove old brake rotor
   Pull the brake rotor straight off the wheel hub. If the rotor is stuck due to corrosion, tap it from behind with a rubber mallet while rotating it. Do not use excessive force or strike the rotor face. For severely stuck rotors, spray penetrating oil around the hub center and allow to soak, then retry. Once removed, inspect the hub surface for damage or excessive corrosion.
8. 8

   Prepare hub surface and new rotor
   Clean the wheel hub mounting surface thoroughly with a wire brush and brake cleaner to remove all rust and debris. The surface must be clean and flat for proper rotor seating. Remove any protective coating from the new rotor using brake parts cleaner - rotors are shipped with anti-corrosion oil that must be completely removed. Clean both sides of the new rotor thoroughly and wipe dry.
   ⚠Failure to remove protective coating from new rotors will cause severe brake noise and reduced braking performance.
9. 9

   Install new brake rotor
   Slide the new brake rotor onto the wheel hub, aligning the holes. The rotor should sit flush against the hub with no wobble or gaps. Install the rotor set screw and tighten to the specified torque. This screw only holds the rotor during service - the wheel provides actual retention during operation.
   Torque spec

   Rotor Set Screws6 Nm (5 lb-ft)
10. 10

    Reinstall caliper bracket
    Position the caliper bracket back onto the steering knuckle, aligning the bolt holes. Apply a small amount of medium-strength threadlocker to the bracket bolt threads if desired (Honda recommends this). Install both caliper bracket bolts and tighten to the specified torque using a torque wrench. For this generation Accord, use the 120.0 Nm (88 lb-ft) specification for front caliper bracket bolts.
    ⚠️Caliper bracket bolts are CRITICAL safety fasteners. Undertorquing can cause bracket separation and complete brake failure. Use a calibrated torque wrench.
    Torque spec

    Caliper Bracket Bolts97 Nm (71 lb-ft)
11. 11

    Compress caliper piston
    Before reinstalling the caliper over the new rotor (and new pads if installed), the caliper piston must be compressed. Use a C-clamp or brake caliper piston tool to slowly compress the piston fully into the caliper bore. Monitor the brake fluid reservoir during this process - it should not overflow. If it does, remove some fluid with a turkey baster or fluid transfer pump.
12. 12

    Prepare and install caliper slide pins
    Inspect both caliper slide pins for damage, corrosion, or torn boots. The pins should slide smoothly in their bores. Apply a thin coat of silicone brake grease to the smooth sliding portion of each pin (not the threaded portion). Do not use petroleum-based grease.
    ⚠Only use silicone-based brake grease. Petroleum-based products will damage rubber seals and boots.
13. 13

    Reinstall caliper assembly
    Remove the caliper from its temporary support position. Carefully position the caliper over the rotor and align the slide pin holes with the bracket. Insert both caliper slide pin bolts and hand-thread them to start. Using a torque wrench, tighten both slide pin bolts to specification. Ensure the caliper moves smoothly on the slide pins.
    ⚠️Caliper slide pin bolts must be torqued correctly. Improper torque can cause uneven pad wear, reduced braking, or caliper seizure.
    Torque spec

    Caliper Slide Pin Bolts35 Nm (26 lb-ft)
14. 14

    Reinstall wheel and lower vehicle
    Mount the wheel onto the hub, ensuring it seats properly. Install all lug nuts and hand-tighten in a star pattern. Use the floor jack to slightly lift the vehicle and remove the jack stand. Lower the vehicle until the tire just contacts the ground (wheel cannot rotate). Using a torque wrench, tighten the lug nuts to specification in a star pattern. Fully lower the vehicle and remove the jack.
    ⚠️Wheel lug nuts must be torqued in a star pattern to specification. Improper torque can cause wheel detachment or warped brake rotors.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)
15. 15

    Restore brake pedal pressure
    Before moving the vehicle, pump the brake pedal slowly and firmly several times until it feels firm and returns to normal height. The first few pumps will feel soft as the caliper piston extends to contact the pads and rotor. Check the brake fluid reservoir level and top off with DOT 3 brake fluid if needed (do not overfill). Test brake operation at low speed in a safe area before returning to normal driving.
    ⚠️DO NOT DRIVE the vehicle until brake pedal feels firm and normal. Failure to restore pedal pressure means the brakes will not function.

Reassembly

1. Torque specifications are CRITICAL for brake system safety - verify all fasteners are properly torqued before driving
2. If you replaced only one rotor, braking performance may be uneven - strongly consider replacing the opposite side rotor as well
3. New rotors and pads require a bedding-in procedure: perform 8-10 moderate stops from 40 mph to 15 mph with 30 seconds between stops to properly transfer pad material to the rotor surface
4. Avoid hard braking for the first 200 miles to allow proper break-in

Verification

• Verify brake pedal feels firm and returns to normal height after pumping
• Check brake fluid reservoir level is between MIN and MAX marks
• Visually inspect that caliper is properly seated on bracket and slide pins are fully engaged
• Verify all bolts are installed and torqued: caliper bracket bolts (120 Nm), slide pin bolts (35 Nm), wheel lug nuts (140 Nm in star pattern)
• Spin the wheel by hand - it should rotate with only slight drag from the brake pads, with no grinding, scraping, or rubbing sounds
• Test drive at low speed (under 15 mph) in a safe area and verify brake response is normal before returning to regular driving
• After test drive, recheck wheel lug nut torque - retorque if necessary
• Listen for any abnormal brake noises during initial driving - some light squealing during break-in is normal, but grinding or severe noise indicates a problem
• Monitor brake pedal feel over the next few days - if pedal becomes soft or spongy, air may have entered the system and bleeding may be required

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