Honda Ridgeline Battery Replacement

Replacing honda ridgeline battery

Can’t start your Honda Ridgeline due to a dead battery? Learn how to fix the problem by replacing the battery of your vehicle. This guide will show you step-by-step procedures for replacing the battery on a Honda Ridgeline.


One of the symptoms of a dead battery is clicking or lack of clicking sound when engaging the starter. However, the problem might not be the battery, it can be the corrosion of terminals, a bad alternator, or loose connections. You may visit this site to check if your Honda Ridgeline battery is the problem.

What you will need

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ACDelco Gold 48AGM 36 Month Warranty AGM BCI Group 48 Battery, Black
ACDelco Gold 48AGM 36 Month Warranty AGM BCI Group 48 Battery, Black
High density negative paste, improves performance and increases battery life; Calcium lead positive grid, maximizes conductivity and allows for low resistance


  • Ratchet or T-handle
  • 10mm deep socket
  • 10mm regular socket
  • Flat-head screwdriver
  • Philips screwdriver


  • Honda Ridgeline Battery PN 31500-TZ-A21
    • Group Size 48 Battery
    • Dimensions:    (L) 11″ (W) 6.75″ (H) 11″
    • Other part numbers: H6/LN3, 48H6, H6-DLG, 48-70, MTP-48/H6, 8448, 48EXT, 50848


  1. Park the vehicle on safe and level ground.
  2. Set the parking brakes on.
  3. Open the driver’s side door, beside the lower door molding, near the front side of the door; you can find a lever with an icon resembling a car with an open hood, twist it upward to release the hood latch.
  4. There is still a safety hood release lever under the hood that you need to release to open the hood. Go to the front of the vehicle, find a small lever between the hood and the body, then pull it upward; this action would release the hood. You can now open the hood.
  5. Find the hood stay and secure it to the hood. To prevent the hood from falling while you are fixing the car.
  6. The Honda Pilot Ridgeline’s battery cannot be accessed easily; you have to remove the air inlet resonator to access the battery. But before you can access the air inlet resonator, a plastic heat insulator should be removed first.
  7. Grab the black plastic insulator covering the air inlet resonator, pull up the insulator, and then pull it out. Secure the insulator in a safe place.
  8. The resonator inlet will now be visible; you can use a Philips screwdriver to loosen the two retaining screws which hold it in place. There will be a lock washer on both screws, so you need to remove those. You may use a thin flat screwdriver to pry the washers out.
  9. Pull the resonator off the engine while gently shaking it loose. Once removed, you can now see the car battery.
  10. The battery is secured by a plastic bracket that prevents the battery from bouncing up and down and prevents battery side-to-side movements. To remove the bracket, loosen the two 10mm nuts using a deep socket and a ratchet, set your ratchet to loosen the setting, then turn the ratchet counterclockwise. The nuts are connected to a j shape metal threaded bar connected to the base of the battery holder. Holding the j-bars while loosening the nuts should prevent the j-bar from falling into tight spaces.
  11. Loosen the negative terminal’s retaining nut using a 10 mm socket wrench or t-wrench.
  12. Pull the negative battery terminal off the pole.
  13. Remove the positive terminal cover, then loosen the positive terminal’s retaining nut using a 10 mm socket wrench or t-wrench.
  14. Pull the positive battery terminal off the pole.
  15. The battery is still protected by a black plastic cover, which also houses the cooling fan for the battery. Find a cover clip and pull it to release the lock; you can now pull the battery cover off.
  16. Using the battery handle, pull out the old battery. Don’t forget the location of each polarity; the + side of the battery has a red cover on the terminal.
  17. Clean the battery cover.
  18. Prepare the new battery. The stock battery’s part number is 31500-TZ-A21, the group size is 48 CCA is 620 Amps, and Ah@20 HR is 70. The actual size code for this battery is H6, L3, or 66L3.
  19. Using a battery cleaner, rub both poles before installation. Also, clean the battery terminals (connectors) using the brush side of the battery cleaner.
  20. Position the battery in a way that the + pole is on the left.
  21. Re-install the plastic battery cover.
  22. Connect the positive (+) terminal to the positive pole tighten the 10mm nut.
  23. Connect the negative (-) terminal to the negative pole tighten the 10mm nut.
  24. Reinstall the battery bracket by aligning the j-bars on the bottom of the holder and the bracket. Fasten the two 10 mm nuts.
  25. Reinstall the battery positive terminal cover.
  26. Install the air intake resonator by pushing its hose back into the engine intake slot and installing the retaining screws and washers.
  27. Reinstall the plastic heat insulator.
  28. Start the engine.

Before you replace the old battery, it is good to perform a battery check to ensure the battery is faulty. Visit any auto parts store to perform a battery test. Most stores will test your old battery for free.

Otherwise, you may be replacing a good battery for no reason. For more details on how to check your battery, please visit our battery testing guide.

Frequently Asked Questions

How many car batteries do I have?

A Honda Ridgeline with an internal combustion engine will have only one battery.

I always hear about CCA. What is it?

The Cold Cranking Performance (CCA) measures the starting performance of the battery. In simple terms, the higher the CCA, the easier it will be to start the vehicle.

What is the voltage rating of my Honda Ridgeline?

Honda Ridgeline uses  12 volts batteries.

We hope you find the Honda Ridgeline Battery Replacement guide helpful. Check these troubleshooting and repair guides for more help on your Honda.

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