Replace the front ABS wheel speed sensor on a 2017 Maserati Levante 3.0L V6 Twin Turbo RWD to restore proper anti-lock braking system function.

Warnings

Tools required

Parts

• Front ABS wheel speed sensor × 1 — Use OEM Maserati specification
• Sensor mounting bolt (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Loosen front wheel lug nuts before lifting vehicle
3. Raise front of vehicle and support securely on jack stands at manufacturer-specified lift points
4. Remove front wheel on side requiring sensor replacement
5. If available, connect OBD-II scan tool to document fault codes before starting work

Procedure

1. 1

   Locate the ABS wheel speed sensor
   The front ABS wheel speed sensor is mounted on the steering knuckle near the brake rotor and wheel hub assembly. Inspect the sensor mounting location behind the brake caliper bracket. Note the sensor wire routing from the sensor body up through clips along the suspension components to the wheel well.
2. 2

   Disconnect sensor electrical connector
   Follow the sensor wire harness up to the electrical connector located in the wheel well area. Press the connector locking tab and carefully separate the connector halves. Inspect connector pins and terminals for corrosion or damage. If corrosion is present, clean with electrical contact cleaner.
3. 3

   Release wire harness from routing clips
   Carefully release the sensor wire harness from all mounting clips and brackets along the suspension control arm and knuckle. Use a plastic pry tool if needed to avoid damaging clips. Note the exact routing path for reinstallation to prevent wire chafing or interference with suspension movement.
   ⚠Do not pull excessively on sensor wire; tension can damage internal connections
4. 4

   Remove sensor mounting bolt
   Locate the single T30 Torx mounting bolt securing the ABS sensor to the steering knuckle. Remove the bolt completely. If the bolt is corroded or seized, apply penetrating oil and allow to soak before attempting removal. Keep the bolt if it is in good condition for reuse.
5. 5

   Extract the ABS sensor
   Carefully pull the sensor straight out of its bore in the steering knuckle. If the sensor is stuck due to corrosion, gently twist while pulling. Do not use excessive force or pry against the sensor body. If severely corroded, apply penetrating oil around the sensor body and allow to soak, then retry removal.
   ⚠Avoid striking the wheel hub or tone ring during sensor removal as damage will cause permanent ABS faults
6. 6

   Clean sensor mounting bore
   Use a wire brush or clean rag with contact cleaner to thoroughly clean the sensor mounting bore in the steering knuckle. Remove all dirt, rust, and debris. The bore must be clean to ensure proper sensor seating and correct air gap between sensor and tone ring. Inspect the tone ring on the hub for damage or missing teeth.
7. 7

   Prepare new sensor for installation
   Remove new sensor from packaging and inspect for damage. Compare with old sensor to verify correct part. Apply a thin coat of dielectric grease to the sensor O-ring or mounting surface to prevent corrosion and aid future removal. Do not apply grease to the sensor tip itself.
8. 8

   Install new ABS sensor
   Insert the new sensor straight into the mounting bore in the steering knuckle, ensuring it seats fully. The sensor should slide in smoothly without force. Verify the sensor is flush with the mounting surface and properly oriented for bolt hole alignment.
9. 9

   Install and torque sensor mounting bolt
   Install the T30 Torx mounting bolt and hand-tighten initially. Using a calibrated torque wrench, tighten the sensor mounting bolt to specification. This bolt must not be overtightened as it can crack the sensor body or deform the mounting bore, causing sensor malfunction or air gap issues.
   ⚠Overtightening ABS sensor bolt will damage sensor and require replacement
   Torque spec

   ABS Sensor Bolt10 Nm (7 lb-ft)
10. 10

    Route and secure sensor wire harness
    Route the sensor wire harness along the original path, ensuring it matches the noted routing from disassembly. Secure the harness in all original clips and brackets. Verify the wire has adequate slack for full suspension travel and steering lock-to-lock movement without tension or binding.
11. 11

    Reconnect electrical connector
    Reconnect the sensor electrical connector, ensuring it clicks fully into place and the locking tab engages. Gently tug on the connection to verify it is secure. Ensure no moisture or contaminants are present in the connector.
12. 12

    Reinstall wheel and lower vehicle
    Reinstall the front wheel, threading lug nuts by hand initially. Lower vehicle until tire just contacts ground to prevent wheel rotation. Torque wheel lug nuts to specification using a star pattern to ensure even seating. Fully lower vehicle and remove jack stands.
    Torque spec

    Wheel Lug Nuts142 Nm (105 lb-ft)

Reassembly

1. Double-check all electrical connections are secure and wire routing allows full suspension travel
2. Verify sensor mounting bolt is torqued to specification and sensor is fully seated
3. Ensure no tools or parts were left in wheel well area

Verification

• Start engine and verify ABS warning light follows normal startup sequence (illuminates briefly then extinguishes)
• If ABS light remains on, use OBD-II scan tool to read fault codes and verify sensor is communicating properly
• Test drive vehicle at speeds above 15 mph to allow ABS system to initialize and verify sensor operation
• Perform gentle brake test in safe area to confirm ABS functionality if appropriate
• Re-scan for fault codes after test drive to ensure no new codes are present

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