brakes

ABS Tone Ring

for 2021 Honda Civic 1.5L I4 Turbo · FWD

Difficulty

Moderate

Time

1.5 h

Tools

Steps

🤖AI-generated, not yet human-verified. This walkthrough was produced by AI and may contain errors. Treat it as a guide, cross-check every step and torque value against the manufacturer's service manual, and stop if anything looks unsafe. This is a moderate-risk job — take extra care.

This procedure covers the replacement of a damaged or worn ABS tone ring (reluctor ring) on a 2016-2021 Honda Civic 1.5L Turbo, which may be causing ABS/VSA warning lights or inaccurate wheel speed sensor readings.

Warnings

⚠The ABS tone ring design varies by production date. Some models have a serviceable tone ring that presses onto the hub, while others have an integrated tone ring requiring complete hub replacement. Inspect before ordering parts.

⚠Never allow the brake caliper to hang by the brake hose. This can damage the hose internally and cause brake failure.

ℹ️This procedure does not require brake bleeding if brake hoses are not disconnected.

⚠️Ensure vehicle is properly supported on jack stands before working underneath. Never rely on a floor jack alone.

Tools required

Floor jack and jack standsEssential

Torque wrench (10-150 Nm range)Essential

19mm socket for lug nutsEssential

17mm socket for caliper bracket boltsEssential

14mm socket for caliper boltsEssential

Brake caliper hanger or wireEssential

Hub puller or slide hammer with adapterEssential

Press or large C-clamp (for hub installation)Essential

Bearing driver set or large socket

Wire brush

Brake cleanerEssential

Anti-seize compound

Dial indicator (for hub runout check)

Parts

ABS tone ring (reluctor ring) × 1 — Use OEM specification
Wheel hub assembly (if tone ring is integrated) × 1 — Use OEM specification
Hub retaining nut × 1 — Replace if removed - Use OEM specification

Preparation

Park vehicle on level surface and engage parking brake
Loosen wheel lug nuts 1/4 turn while vehicle is on ground
Raise and secure vehicle on jack stands at proper lift points
Remove wheel completely
Inspect ABS tone ring through wheel hub opening to confirm damage (missing teeth, cracks, rust buildup)
Verify replacement part matches your specific hub configuration (press-on vs integrated)
Clean work area around hub and brake components with brake cleaner

Procedure

1
Remove brake caliper
Remove the two caliper mounting bolts using a 14mm socket. Carefully lift the caliper off the rotor and secure it to the suspension spring or strut using a caliper hanger or sturdy wire. Do not let it hang by the brake hose.
Torque spec
Caliper Bolts84 Nm (62 lb-ft)
2
Remove caliper bracket
Remove the two caliper bracket bolts using a 17mm socket. These bolts are torqued to a high specification and may require significant force to break loose. Remove the bracket and set aside with the brake pads.
Torque spec
Bracket Bolts97 Nm (71 lb-ft)
3
Remove brake rotor
If present, remove any retaining screws from the rotor face. Pull the brake rotor straight off the hub. If rotor is stuck due to corrosion, use penetrating oil and tap with a rubber mallet from behind. Do not damage the wheel studs.
4
Inspect ABS sensor and clear area
Locate the ABS wheel speed sensor mounted near the hub assembly. Clean any debris or metal shavings from around the sensor. If sensor is damaged or will interfere with hub removal, unbolt it and carefully move aside. Clean the tone ring area thoroughly with brake cleaner to assess damage.
5
Remove axle nut (if applicable)
For front hubs requiring complete removal, remove the cotter pin and axle nut (typically 32mm). This requires a breaker bar and the vehicle's full weight on the ground with brakes applied, or an assistant holding the brakes. If only replacing a press-on tone ring, this step may not be necessary.
⚠Axle nut torque is extremely high (approximately 240 Nm). Always use a new cotter pin on reassembly.
6
Remove hub assembly (if required)
If the tone ring is integrated into the hub, remove the hub mounting bolts from behind the knuckle (typically 4 bolts accessible from rear). Use a hub puller or slide hammer to extract the hub assembly from the knuckle. For press-on tone rings, the hub may remain installed.
Torque spec
Mounting Bolts26 Nm (19 lb-ft)
7
Remove damaged tone ring
For press-on type tone rings, use a chisel or cutting tool to carefully split the old tone ring. Work slowly to avoid damaging the hub surface. If the tone ring is integrated, proceed with complete hub replacement. Clean all corrosion and debris from the hub mounting surface with a wire brush.
⚠Do not score or gouge the hub surface where the new tone ring will seat. Surface damage can cause tone ring wobble and false ABS signals.
8
Install new tone ring or hub assembly
For press-on tone rings, align the new ring squarely on the hub and use a bearing driver or appropriately sized socket to press it fully onto the hub until seated against the shoulder. Apply even pressure around the circumference. For integrated designs, install the new hub assembly into the knuckle ensuring proper alignment.
⚠The tone ring must be perfectly square to the hub axis. Any wobble will cause erratic ABS operation. Check alignment visually during installation.
9
Reinstall hub assembly (if removed)
If hub was removed, press or carefully tap the hub assembly back into the knuckle. Install the hub mounting bolts from behind and tighten to specification. Ensure the hub is fully seated and rotates freely without binding.
Torque spec
Mounting Bolts26 Nm (19 lb-ft)
10
Verify tone ring installation
Slowly rotate the hub and visually inspect the tone ring for even spacing from the sensor mounting area. Use a feeler gauge or measure the air gap between the tone ring teeth and where the ABS sensor tip will be (should be 0.5-1.5mm typically). Check for any wobble or runout.
11
Reinstall brake rotor
Clean the hub face and rotor mounting surface with brake cleaner. Install the rotor onto the hub and secure with any retaining screws if equipped. Ensure rotor sits flush against the hub face.
12
Reinstall caliper bracket
Position the caliper bracket over the rotor and knuckle. Apply threadlocker to the bracket bolts as recommended. Install and torque the two bracket bolts to specification in a cross pattern.
ℹ️Threadlocker is recommended for caliper bracket bolts to prevent loosening under braking forces.
Torque spec
Bracket Bolts97 Nm (71 lb-ft)
13
Reinstall brake caliper
Remove the caliper from its hanger. Ensure brake pads are properly positioned in the bracket. Slide the caliper over the rotor and pads. Install the caliper bolts and torque to specification.
Torque spec
Caliper Bolts84 Nm (62 lb-ft)
14
Reinstall wheel and lower vehicle
Mount the wheel onto the hub. Install lug nuts and hand-tighten in a star pattern. Lower the vehicle until the tire just contacts the ground. Torque lug nuts to specification in a star pattern. Fully lower vehicle and remove jack stands.
Torque spec
Wheel Lug Nuts129 Nm (95 lb-ft)

Reassembly

Pump brake pedal several times to ensure proper caliper piston position before moving vehicle
If axle nut was removed, torque to specification (consult service manual) and install new cotter pin
Repeat procedure for opposite side if both tone rings require replacement for even wear

Verification

Start the engine and verify ABS warning light extinguishes after initial self-test (typically 3-5 seconds)
Test drive vehicle at low speed (5-10 mph) and verify no ABS warning lights illuminate
Using a diagnostic scanner, verify all four wheel speed sensors are reporting speed data correctly
Perform a controlled ABS activation test in a safe area to confirm proper system operation
Re-check wheel lug nut torque after 50-100 miles of driving