Harley-Davidson X440 Rear ABS Sensor Ring HDH43252ACD000S | Genuine Rear Wheel Speed Tone Ring

Harley-Davidson X440 Rear ABS Sensor Ring – HDH43252ACD000S

Replace a bent, damaged, distorted or missing rear ABS sensor ring with the correct genuine Harley-Davidson X440 component. Part number HDH43252ACD000S is identified in the supplied X440 parts catalogue as SENSOR RING REAR. In buyer-friendly terminology, this part is commonly called the rear ABS sensor ring, rear ABS tone ring, rear wheel speed sensor ring, ABS reluctor ring, or rear encoder ring.

This listing is deliberately written around the search terms customers, workshops and mechanics are most likely to use online: Harley X440 rear ABS ring, X440 rear ABS sensor ring, X440 rear wheel speed sensor ring, Harley X440 ABS tone ring, X440 rear reluctor ring, and the exact OEM reference HDH43252ACD000S.

The Harley-Davidson X440 uses a dual-channel ABS system with wheel-speed sensing at both wheels. The rear sensor ring works with the rear wheel-speed sensor so the ABS controller can monitor rear-wheel rotational speed. If the ring is bent, physically damaged, incorrectly spaced or contaminated, the wheel-speed signal can be affected and the ABS system may not operate normally.

Product Identity

• Brand: Harley-Davidson
• Part Number: HDH43252ACD000S
• Catalogue Base Part Number: HDH43252ACD000
• Official Catalogue Description: SENSOR RING REAR
• Common Names: Rear ABS Sensor Ring / ABS Tone Ring / Rear Wheel Speed Ring / Reluctor Ring
• Location: Rear wheel / rear brake / ABS sensing area
• Quantity: 1 piece

Confirmed Compatibility

• Harley-Davidson X440 – September 2023

Fitment note: this exact part number is confirmed from the supplied September 2023 X440 catalogue. Do not assume compatibility with X440 OBDII or X440T solely by appearance; match the exact OEM number before ordering.

What the Rear ABS Sensor Ring Does

The rear ABS sensor ring provides the repeating reference pattern read by the rear wheel-speed sensor. As the wheel rotates, the sensor reads this ring and sends wheel-speed information to the ABS control system. The ABS controller compares wheel-speed information to help detect wheel lock during braking.

Why This Part Matters

• Provides the reference signal used for rear wheel-speed sensing
• Supports correct operation of the rear ABS channel
• Helps the ABS control unit determine rear-wheel rotational speed
• Must remain correctly aligned and undamaged for reliable sensor reading
• Is part of the motorcycle's braking and safety-control system

Common Reasons for Replacement

• Sensor ring is bent during tyre or wheel removal
• Ring is damaged after an accident or impact
• Teeth / slots are distorted or physically damaged
• ABS warning appears after rear-wheel service and the ring is found damaged
• Rear wheel-speed reading is inconsistent and the ring is visibly defective
• Original ring is missing after wheel, brake-disc or hub work

Important – Sensor Ring Only

HDH43252ACD000S is the rear sensor ring only. It is not the rear wheel-speed sensor, ABS control unit, rear brake disc or complete rear brake assembly.

Do not confuse this part with:

• Rear wheel-speed / ABS sensor
• Rear brake disc / rotor
• Rear brake caliper
• ABS HECU / hydraulic electronic control unit
• Front ABS sensor ring
• Rear wheel or hub assembly

Related Parts Visible in the Same Rear-Brake Group

• HDH43251RAA000S – Disc RR Brake
• HDH43252ACD000S – Sensor Ring Rear – this product
• HDH43301AABA00S – Clip, Brake Line
• HDH43310ACJ00002 – Clamper A RR Brake

Important After Tyre or Rear-Wheel Work

The X440 owner documentation specifically warns that the sensor ring should not be damaged or bent when the wheel is removed for tyre or puncture work. If the ring has been distorted during wheel handling, replacement with the correct part is preferable to attempting to straighten a safety-system component by guesswork.

What’s in the Box

• 1 x Genuine Harley-Davidson X440 Rear ABS Sensor Ring
• Part number: HDH43252ACD000S

Installation & Inspection Notes

• Inspect the ring carefully for bending, dents or damaged signal features
• Check the rear wheel-speed sensor for damage or contamination at the same time
• Ensure the ring sits correctly and does not contact the sensor
• Maintain the specified sensor-to-ring relationship during installation
• Check rear wheel and brake-disc alignment after wheel removal
• ABS-system work should be carried out by a competent technician
• Confirm the ABS warning lamp behaves normally after installation

Return Prevention Note

Please confirm that you need the REAR SENSOR RING and not the rear wheel-speed sensor itself. Match HDH43252ACD000S before ordering.

FAQs

1. What is HDH43252ACD000S?
It is the genuine rear ABS sensor ring / rear wheel-speed tone ring listed for the Harley-Davidson X440.

2. Is this the ABS sensor?
No. This is the sensor ring that the rear wheel-speed sensor reads. The electronic wheel-speed sensor is a separate component.

3. Is an ABS sensor ring also called a tone ring?
Yes. “ABS tone ring”, “sensor ring”, “wheel-speed ring” and “reluctor ring” are common buyer and workshop terms for this type of component.

4. Which motorcycle is confirmed?
The supplied parts catalogue confirms Harley-Davidson X440 – September 2023.

5. Can a bent ring cause an ABS problem?
Yes. If the ring is bent or damaged, the sensor may receive an incorrect or inconsistent wheel-speed signal.

6. Can this ring get damaged during tyre replacement?
Yes. The X440 owner documentation specifically cautions against damaging or bending the sensor ring during wheel removal for tyre or puncture work.

7. Is this the rear brake disc?
No. The rear brake disc is a separate component. This listing is only for the rear ABS / wheel-speed sensor ring.

Harley X440 rear ABS sensor ring, X440 rear ABS ring, Harley X440 ABS tone ring, X440 rear wheel speed sensor ring, X440 rear reluctor ring, SENSOR RING REAR, Harley X440 ABS spare, HDH43252ACD000S, HDH43252ACD000.