Mass Air Flow Sensor

Replace the Mass Air Flow (MAF) sensor on a 2017 Maserati Levante 3.0L V6 Twin Turbo to restore proper air intake measurement and engine performance.

Warnings

Tools required

Parts

• Mass Air Flow Sensor × 1 — Use OEM Maserati specification
• MAF sensor O-ring or gasket (if applicable) × 1 — Verify if included with sensor

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine to cool for at least 15 minutes
3. Turn ignition to OFF position and remove key
4. Open hood and secure with prop rod
5. Locate the MAF sensor in the air intake tube between the air filter housing and throttle body on the passenger side of engine bay

Procedure

1. 1

   Disconnect battery negative terminal
   Using a 10mm socket, loosen the negative battery terminal clamp and disconnect the cable. Secure it away from the battery post to prevent accidental reconnection during the procedure.
2. 2

   Loosen air intake tube clamps
   Locate the hose clamps on both sides of the MAF sensor assembly (upstream near air filter box and downstream toward throttle body). Using a flathead screwdriver or 8mm socket depending on clamp type, loosen both clamps but do not fully remove them yet.
   Torque spec

   Air Intake Clamps3 Nm (2 lb-ft)
3. 3

   Disconnect MAF sensor electrical connector
   Press down on the locking tab of the electrical connector attached to the MAF sensor and carefully pull the connector straight out. Wiggle gently if it resists - do not force. Inspect connector pins for corrosion or damage.
   ⚠Do not pull on the wires - grasp the connector body only to avoid damaging the wiring harness
4. 4

   Remove MAF sensor mounting screws
   Using a T25 Torx bit, remove the two screws securing the MAF sensor to the air intake tube. These are typically located on opposite sides of the sensor housing. Keep screws in a safe location for reinstallation.
   Torque spec

   MAF Sensor Screws3 Nm (2 lb-ft)
5. 5

   Extract MAF sensor from air intake tube
   Carefully slide the MAF sensor out of the intake tube. Note the orientation of the sensor and the position of any alignment tabs or gaskets. If an O-ring or gasket is present, inspect it for damage or deterioration.
6. 6

   Clean mating surfaces
   Using a clean lint-free cloth, wipe down the inside of the air intake tube where the MAF sensor mounts. Remove any dirt, oil residue, or debris. Ensure the sealing surface is completely clean and dry before installing the new sensor.
7. 7

   Install new MAF sensor
   If the new sensor includes a gasket or O-ring, ensure it is properly seated in the sensor groove. Carefully insert the new MAF sensor into the air intake tube, aligning it with the mounting holes and ensuring proper orientation (arrow on sensor should point toward engine/airflow direction). Do not touch the sensing element.
   ⚠Verify the sensor is oriented correctly with airflow direction arrow pointing toward the throttle body
8. 8

   Secure MAF sensor with mounting screws
   Install the two T25 Torx mounting screws by hand first to ensure proper thread engagement. Using a torque wrench, tighten the screws to specification in a cross-pattern to ensure even seating of the sensor.
   Torque spec

   MAF Sensor Screws3 Nm (2 lb-ft)
9. 9

   Reconnect electrical connector
   Push the electrical connector firmly onto the MAF sensor until you hear or feel a distinct click indicating the locking tab has engaged. Gently tug on the connector to verify it is securely attached.
10. 10

    Tighten air intake tube clamps
    Position the intake tube properly on both sides of the MAF sensor assembly. Tighten both hose clamps to specification, ensuring the tube is properly seated and there are no air leaks. Verify clamps are positioned over the beaded sections of the tubes.
    Torque spec

    Air Intake Clamps3 Nm (2 lb-ft)
11. 11

    Reconnect battery negative terminal
    Reconnect the negative battery cable to the battery post and tighten the clamp securely using a 10mm socket. Ensure good contact with the battery terminal.

Reassembly

1. Ensure all intake tube clamps are properly tightened to prevent air leaks that could affect engine performance
2. Verify the MAF sensor electrical connector is fully seated and locked
3. Double-check that no tools or cloths were left in the engine bay

Verification

• Start the engine and allow it to idle - verify smooth idle with no rough running or stalling
• Check for any unusual hissing sounds near the MAF sensor indicating air leaks at the clamps
• Use an OBD-II scanner to verify no MAF-related fault codes are present (P0100-P0104 range)
• Take vehicle for a test drive to verify normal acceleration response and throttle behavior
• Monitor fuel economy over the next several fill-ups to confirm proper MAF sensor operation

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