Honda Pilot Ridgeline 3.5L V6 Alternator Replacement

ridgeline alternator replacement

Is your Honda Ridgeline battery light on, the car dies when driving, the battery won’t charge, and having trouble starting the engine? Learn how to fix the problem by replacing the alternator of your Honda Ridgeline.


Common symptoms indicating a problem with your Honda alternator include:

  • The battery light stays on
  • Dead battery
  • Car dies when driving
  • Lights are dim
  • Whining and growling noise
  • Having trouble starting the engine

What you will need

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Remanufactured DB Electrical Honda/Acura Alternator Replacement for Acura 3.5L MDX 03-09, Acura 3.5...
Remanufactured DB Electrical Honda/Acura Alternator Replacement for Acura 3.5L MDX 03-09, Acura 3.5…
Remanufactured Alternator built to meet OEM specifications for Acura, Honda; Every part is manufactured to OEM specifications for perfect fit and performance


  • Honda Alternator
  • Serpentine Belt
    • Not required, but recommended to replace at the same time.


  • Metric Tool Set
  • Torque Wrench
  • Pry Bar
  • Penetrating oil
  • Screw Driver
  • 14mm Wrench


Follow these steps to change the alternator on a Honda 3.5 L V6 engine.


  1. Park the vehicle on level ground and let it cool down. If the engine is still hot, you risk getting burned.
  2. Pull the hood release under the dashboard and open the hood. Secure the hood with the hood support.
  3. Locate the battery in the engine bay and disconnect the negative battery terminal. Disconnect negative battery terminal
  4. Spray penetrating oil to the bolts that you will remove, especially if it is the first time the alternator will be replaced. The bolts tend to get rusted and can be difficult to remove otherwise.
  5. Remove the components blocking your access to the alternator, like the power steering fluid reservoir, the overflow reservoir, and any lines.
  6. Take a photo or draw the serpentine belt routing, so you will not have difficulty installing it back.
  7. Use the 14mm wrench with the pipe as an additional handle so you will not have to exert too much force to push it towards the windshield side to release the tension on the belt so you can slide the serpentine belt out. The tensioner socket may not always be 14mm. Loosen the serpentine belt honda pilot ridgeline odyssey
  8. Remove the bracket on top of the alternator. These bolts can rust and break easily. It’s essential to spray penetrating oil on these bolts and wait for at least fifteen minutes before removing them.  Honda alternator bracketHonda dinamo bracket removed
  9. Remove the alternator bolts.Can't remove honda 3.5 v6 alternator due to hidden bolt Remove the long alternator bolt on the bottom of the alternatorremove alternator bolt honda pilot honda ridgeline
  10. Disconnect the positive terminal at the back of the alternator. This is typically a 12mm nut. We had to use a few extensions to break this nut loose. alternator boltdisconnect positive from alternor
  11. Unplug the connector at the back of the alternatorPress the connector, then pull to unplug it. unplug connector on honda alternator
  12. Using both hands, you must rock the alternator up and down while pulling it up.
  13. Remove the alternator from the vehicle. remove honda alternator


  1. Slide the new alternator back to its position, install the long bolt, and set the torque to 33 lbs. ft.
  2. Install the top bolt and bracket of the alternator and set it to 16 lbs. ft.
  3. Install the new serpentine belt in its original routing position and make sure that the belt is seated on the pulley groove.
  4. Connect the connector and terminal of the alternator.
  5. Connect the battery terminal.
  6. Start the engine and check the voltage. It would help if you were getting between 14.0 and 14.7 volts with the engine running.

Frequently Ask Questions

How much does it cost to replace a Honda Alternator

  • The average cost to replace a Honda Alternator is between $447 and $800. Labor costs are estimated between $125 and $250, while parts are priced between $350 and $600.

How long does a Honda Alternator last?

  • The average life span of an Alternator is about 6 to 10 years. It depends on how many miles the vehicle is driven regularly and how many aftermarket accessories the owner have installed, which may cause the alternator to work overtime.

How to test an alternator?

  • Using a voltmeter, connect your positive lead to the battery’s positive terminal and negative charge to the negative terminal of the storm. It would be best if you were getting 14 v to 14.8 v, which means your alternator is working correctly.


  • ACURA  MDX 2003-2006 3.5L
  • ACURA  MDX 2007-2009 3.7L
  • ACURA  RL 2005-2008 3.5L
  • ACURA  TL 2004-2008 3.2L
  • ACURA TL 2007-2008 3.5L
  • HONDA  ODYSSEY 2005-2007 3.5L
  • HONDA  PILOT 2005-2008 3.5L
  • HONDA  RIDGELINE 2006-2008 3.5L

Part Numbers

Manufacturer Part Number    AS-D219
Interchange Part Number    31100-RDJ-A01,31100-RGL-A01,CSC10,CSD29,AND0339,VND0339
Other Part Number    104210-3100,104210-4290, 104210-4300,104210-4301
Cross Part Number    31100-RGL-A01,31100-RGM-A01,31100-RJA-A01,31100-RJA-A02
Superseded Part Number    31100-RYP-A01,CSD29,CSD30,CSD69,400-52163,400-52252R​​​​​​​

There may be more part numbers not included in this list.


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We hope you find the Honda Pilot Ridgeline 3.5L V6 Alternator Replacement guide helpful. Check these troubleshooting and repair guides for more help on your Honda.

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