Alternator

This procedure covers the removal and replacement of the alternator on a 2017 Maserati Levante with the 3.0L V6 Twin Turbo engine, including serpentine belt removal and electrical disconnections.

Warnings

Tools required

Parts

• Alternator × 1 — Use OEM specification or quality aftermarket 180A alternator
• Serpentine belt (if worn or damaged) × 1 — Use OEM specification

Preparation

1. Ensure vehicle is on level ground with parking brake engaged and transmission in Park
2. Allow engine to cool completely if recently operated (minimum 2 hours)
3. Position work light to illuminate right side of engine bay
4. Photograph serpentine belt routing for reference during reinstallation

Procedure

1. 1

   Disconnect battery negative terminal
   Open the hood and locate the battery in the engine bay. Using a battery terminal wrench, loosen and remove the negative (-) terminal cable from the battery. Secure the cable away from the battery post to prevent accidental reconnection. Wait at least 10 minutes before proceeding to allow electrical systems to fully discharge.
   Torque spec

   Battery Terminal Bolts8 Nm (6 lb-ft)
2. 2

   Access alternator area
   Remove the engine cover by pulling upward on the cover to release the mounting grommets. The alternator is located on the right (passenger) side of the engine, mounted low near the front. Identify the serpentine belt routing and verify it matches your photograph or diagram.
3. 3

   Release serpentine belt tension
   Locate the automatic serpentine belt tensioner on the front of the engine. Insert a 3/8" breaker bar or serpentine belt tool into the tensioner pulley square drive hole. Rotate the tensioner clockwise to release tension, allowing the belt to be slipped off the alternator pulley first, then release tensioner slowly. Remove the belt from remaining pulleys and extract from engine bay. Inspect belt for wear, cracking, or glazing.
4. 4

   Disconnect alternator electrical connections
   Locate the main B+ cable connection on the back of the alternator (thick red wire with protective boot). Pull back the rubber boot and remove the securing nut using appropriate socket. Remove the cable and secure it away from work area. Disconnect the electrical connector by pressing the release tab and pulling straight back. On this twin-turbo engine, you may need to reach from above and below for access.
5. 5

   Remove alternator pivot bolt
   Locate the upper pivot bolt that allows the alternator to pivot for belt tensioning. This bolt passes through the alternator mounting bracket. Using a socket and extension, remove this bolt completely and set aside. Note any spacers or washers for reinstallation.
   Torque spec

   Alternator Pivot Bolt25 Nm (18 lb-ft)
6. 6

   Remove alternator mounting bolts
   Locate the two main alternator mounting bolts that secure the alternator to the engine block bracket. These are critical fasteners. Using appropriate socket with extension, remove both mounting bolts completely. Support the alternator weight as you remove the final bolt to prevent it from dropping.
   Torque spec

   Alternator Mounting Bolts50 Nm (37 lb-ft)
7. 7

   Remove alternator from vehicle
   Carefully maneuver the alternator out of its mounting position. Due to the twin turbocharger configuration, clearance is tight. You may need to angle the alternator toward the front of the vehicle first, then lift upward and out. Be mindful of sharp edges on turbocharger heat shields and surrounding components. Extract the alternator from the engine bay.
8. 8

   Install new alternator
   Position the new alternator into the mounting location, reversing the removal path. Angle the unit as needed to clear turbocharger components and heat shields. Align the alternator mounting holes with the bracket on the engine block. Hand-thread one mounting bolt to hold the alternator in position before installing the second bolt.
9. 9

   Torque alternator mounting bolts
   Install both alternator mounting bolts and hand-tighten. Using a calibrated torque wrench, tighten both mounting bolts to specification in a cross pattern. These are critical fasteners that maintain alternator position and electrical ground connection. Ensure alternator is seated flush against mounting bracket.
   Torque spec

   Alternator Mounting Bolts50 Nm (37 lb-ft)
10. 10

    Install and torque pivot bolt
    Install the upper pivot bolt through the alternator bracket, ensuring any spacers or washers are in their original positions. Using a torque wrench, tighten the pivot bolt to specification. This bolt allows for proper belt alignment and tension.
    Torque spec

    Alternator Pivot Bolt25 Nm (18 lb-ft)
11. 11

    Reconnect alternator electrical connections
    Reconnect the electrical connector to the alternator by pushing firmly until it clicks into place. Install the B+ cable terminal over the alternator stud and secure with the retaining nut, tightening firmly but not excessively (typically hand-tight plus 1/4 turn). Slide the protective rubber boot back over the connection to prevent corrosion.
12. 12

    Install serpentine belt
    Route the serpentine belt around all pulleys according to your reference photograph or routing diagram. Leave the belt off the alternator pulley for last. Using the breaker bar or serpentine belt tool, rotate the tensioner clockwise to create slack, then slip the belt onto the alternator pulley. Slowly release the tensioner to apply proper tension to the belt. Verify belt is seated correctly in all pulley grooves.
13. 13

    Reconnect battery and test
    Reconnect the negative battery terminal cable to the battery post. Using a torque wrench or battery terminal wrench, tighten the terminal bolt to specification. Do not overtighten as this can damage the battery post or terminal. Reinstall the engine cover by aligning grommets and pressing down firmly.
    Torque spec

    Battery Terminal Bolts8 Nm (6 lb-ft)

Reassembly

1. Double-check all electrical connections are secure and protective boots are in place
2. Verify serpentine belt is properly seated in all pulley grooves and tensioner is functioning
3. Ensure no tools or parts remain in the engine bay before starting vehicle

Verification

• Start the engine and verify the charging system warning light on the instrument cluster turns off within 2-3 seconds
• Using a multimeter, verify battery voltage is between 13.8-14.4 volts with engine running at idle
• Turn on electrical loads (headlights, climate control, heated seats) and verify voltage remains above 13.5 volts
• Listen for any unusual noises from the alternator or serpentine belt area during operation
• Visually inspect serpentine belt tracking in all pulleys with engine running (observe from a safe position)
• Allow engine to reach operating temperature and recheck charging voltage remains stable
• Check for any warning messages on the instrument cluster or infotainment system

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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