Remove and replace the alternator on a 2018-2024 Toyota Camry with 2.5L I4 engine, including serpentine belt removal and electrical disconnection.

Warnings

Tools required

Parts

• Alternator × 1 — Use OEM specification or quality aftermarket 130A
• Serpentine belt (if worn or cracked) × 1 — Use OEM specification

Preparation

1. Ensure vehicle is parked on level ground with parking brake engaged
2. Allow engine to cool completely if recently operated
3. Photograph or diagram serpentine belt routing before removal for reference during reinstallation
4. Disconnect battery negative terminal and wait 3 minutes before proceeding
5. Remove engine cover if equipped by pulling upward on cover clips

Procedure

1. 1

   Release serpentine belt tension
   Locate the serpentine belt tensioner on the right side of the engine. Using a 14mm wrench or serpentine belt tool, rotate the tensioner clockwise to release tension. Slide the belt off the alternator pulley first, then carefully release tensioner and remove belt from remaining pulleys.
2. 2

   Disconnect alternator electrical connections
   Locate the electrical connector on the rear of the alternator. Press the release tab and pull the connector straight off. Remove the rubber boot covering the battery terminal connection on the alternator. Using a 10mm socket, remove the nut securing the battery cable to the alternator stud. Remove the cable and set aside.
3. 3

   Remove alternator mounting bolts
   Locate the upper alternator mounting bolt accessed from above the engine. Use a 14mm socket with extension to remove this bolt. Locate the lower pivot bolt accessed from below or through the wheel well. Remove the lower pivot bolt using a 14mm socket. Support the alternator as you remove the final bolt.
4. 4

   Remove alternator from engine bay
   Carefully maneuver the alternator out of the engine bay. On some models, it may be easier to remove it from below. Note the position of any brackets or spacers and keep them organized for reinstallation.
5. 5

   Inspect mounting points and clean surfaces
   Inspect the alternator mounting bracket for cracks or damage. Use a wire brush to clean the alternator mounting surfaces and ground contact points on the engine block. Ensure all mounting holes are clear of debris.
6. 6

   Install new alternator
   Position the new alternator into the mounting bracket, ensuring any spacers or alignment dowels are properly seated. Hand-thread the alternator pivot bolt first to hold the alternator in position, then hand-thread the upper mounting bolt.
7. 7

   Torque alternator mounting bolts
   Torque the alternator pivot bolt to specification first, then torque the upper mounting bolt. Ensure the alternator is properly seated and aligned before final tightening.
   Torque spec

   Alternator Pivot Bolt25 Nm (18 lb-ft)

   Alternator Mounting Bolts50 Nm (37 lb-ft)
8. 8

   Reconnect alternator electrical connections
   Place the battery cable terminal onto the alternator stud. Install the nut and torque to specification. Replace the rubber boot over the connection. Push the electrical connector onto the alternator until it clicks into place.
9. 9

   Install serpentine belt
   Route the serpentine belt according to the diagram photographed earlier or the underhood belt routing diagram. Ensure the belt is properly seated in all pulley grooves. Rotate the tensioner clockwise and slip the belt over the final pulley, then carefully release the tensioner to apply proper belt tension.
10. 10

    Reconnect battery and verify operation
    Clean the battery terminal posts and cable ends with a wire brush if corroded. Reconnect the battery negative terminal and torque to specification. Start the engine and verify the charging system warning light extinguishes. Check for unusual noises from the alternator or belt area.
    Torque spec

    Battery Terminal Bolts8 Nm (6 lb-ft)

Reassembly

1. Reinstall engine cover if removed by aligning clips and pressing firmly until seated
2. Verify all tools and parts have been removed from engine bay
3. Double-check all electrical connections are secure and properly seated

Verification

• Start engine and verify battery warning light extinguishes within 2-3 seconds
• Use a multimeter to verify charging voltage between 13.5-14.5 volts at battery terminals with engine running at idle
• Rev engine to 2000 RPM and verify voltage remains stable
• Listen for any unusual noises from alternator or serpentine belt
• Verify serpentine belt is tracking properly in all pulley grooves without slipping or squealing
• Turn on high electrical loads (headlights, A/C, rear defrost) and verify charging system maintains adequate voltage

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