Heated Seat Module

This procedure covers the removal and replacement of the heated seat module on a 2017 Maserati Levante, typically located under the front seat. The module controls heating elements for both seat cushion and backrest.

Warnings

Tools required

Parts

• Heated seat control module × 1 — Use OEM specification
• Electrical contact cleaner × 1 — Dielectric grease recommended

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery terminal and wait minimum 5 minutes for airbag system discharge
3. Move affected seat fully rearward and adjust to highest position for access
4. Ensure interior lights are off to preserve battery charge during procedure
5. Photograph electrical connector orientations before disconnection

Procedure

1. 1

   Disconnect battery negative terminal
   Using a 10mm socket, loosen and remove the negative battery terminal. Isolate the cable end away from the battery post. Wait minimum 5 minutes before proceeding to allow airbag system capacitors to fully discharge.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
2. 2

   Remove seat lower trim panels
   Using trim panel tools or a flat-blade screwdriver wrapped in cloth, carefully release the plastic trim panels on both sides of the seat base. These panels snap into place with retaining clips. Work slowly to avoid breaking clips. Remove both left and right side panels to expose seat mounting hardware and wiring harness.
3. 3

   Disconnect seat electrical connectors
   Locate the main seat wiring harness beneath the seat. Identify the heated seat module connectors (typically two multi-pin connectors with gray or black housings). Press the locking tabs and carefully disconnect each connector. Note the orientation and routing of wiring for reinstallation.
4. 4

   Locate heated seat module
   The heated seat module is typically mounted to the underside of the seat frame on a metal bracket, positioned near the center of the seat base. It will be a rectangular black or gray plastic housing approximately 4x3 inches with multiple wire harness connections. Use a flashlight to confirm identification.
5. 5

   Remove module mounting hardware
   Using the appropriate Torx bit (typically T25 or T30), remove the mounting screws or bolts securing the heated seat module to its bracket. Most installations use 2-4 fasteners. Support the module as you remove the final fastener to prevent it from falling.
   ℹ️Some modules may have an additional ground wire attached with a separate bolt; note location for reinstallation
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
6. 6

   Remove heated seat module
   Carefully lower the module from its mounting bracket. If any additional wiring connections or ground straps are present, disconnect them at this time. Inspect the mounting bracket for damage or corrosion. Clean mounting surfaces with electrical contact cleaner if corrosion is present.
7. 7

   Inspect connectors and wiring
   Examine all electrical connectors for signs of corrosion, burned terminals, or damage. Check wiring harness for chafing, cuts, or heat damage. Inspect seat heating element resistance using a multimeter if available (typical resistance 2-4 ohms per element). Clean all connector pins with electrical contact cleaner if any corrosion is visible.
   ⚠Corroded or damaged connectors must be repaired before installing new module to prevent repeat failure
8. 8

   Install new heated seat module
   Position the new module onto the mounting bracket, aligning the mounting holes. Apply a small amount of dielectric grease to connector pins on the new module. If a ground strap is present, ensure the contact surface is clean and free of paint or corrosion before attaching. Install mounting fasteners hand-tight initially.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
9. 9

   Reconnect electrical connections
   Reconnect all electrical connectors to the heated seat module in the same configuration as removed. Ensure each connector locks fully into place with an audible click. Verify that no wires are pinched or stretched. Route wiring harness in original path, ensuring no contact with moving seat components or sharp edges.
10. 10

    Reinstall seat trim panels
    Align the side trim panels with their mounting locations. Press firmly on each clip location until all clips are fully seated. Verify panels are flush and secure. Check that no wiring is trapped between trim panel and seat frame.
11. 11

    Reconnect battery
    Clean the battery terminal and cable end with a wire brush if any corrosion is present. Reconnect the negative battery cable to the battery terminal and tighten to specification. Do not overtighten as this can crack the battery post.
    ⚠Overtightening battery terminal can crack battery post; use torque wrench
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all electrical connectors are fully seated and locked
2. Verify no tools or parts are left under the seat
3. Test seat adjustment in all directions before road test
4. Module may require initialization procedure using Maserati diagnostic tool

Verification

• Turn ignition to ON position (engine off) and verify no warning lights for seat systems on instrument cluster
• Test heated seat operation at all temperature settings on both cushion and backrest
• Verify seat adjustment functions operate normally in all directions
• Check that seat heating activates within 30-60 seconds and temperature increases progressively
• If fault codes were present before repair, clearing codes and verification requires Maserati diagnostic equipment

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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