Battery

This procedure covers removal and replacement of the 12-volt battery in a 2018-2024 Honda Accord with 1.5L turbocharged engine.

Warnings

Tools required

Parts

• 12V battery × 1 — Group 51R, 410 CCA minimum (Use Honda OEM 31500-TVA-A01 or equivalent)

Preparation

1. Park vehicle on level ground and turn off ignition
2. Ensure all electrical accessories are off
3. If using a memory saver, connect it to the OBD-II port or 12V accessory outlet before disconnecting battery
4. Open hood and secure with prop rod

Procedure

1. 1

   Access the battery
   Locate the battery in the engine compartment on the driver's side. Remove any plastic battery cover if equipped by lifting it straight up.
2. 2

   Disconnect negative terminal
   Using a 10mm socket, loosen the negative (-) battery terminal bolt. Remove the cable from the terminal and position it away from the battery to prevent accidental contact. Do not allow the cable to touch any metal surfaces.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
3. 3

   Disconnect positive terminal
   Using a 10mm socket, loosen the positive (+) battery terminal bolt. Remove the cable from the terminal. Note the position of any fusible link boxes or additional cables attached to the positive terminal.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
4. 4

   Remove battery hold-down bracket
   Using a 12mm socket, remove the battery hold-down bolt at the base of the battery. The hold-down bracket extends across the top of the battery. Lift the bracket up and off the battery.
   Torque spec

   Battery Hold-Down Bolt8 Nm (6 lb-ft)
5. 5

   Remove battery
   Carefully lift the battery straight up and out of the battery tray. The battery weighs approximately 25-30 lbs. Be careful not to tilt the battery excessively during removal to prevent acid leakage.
6. 6

   Inspect and clean battery tray
   Inspect the battery tray for corrosion, cracks, or damage. Clean any corrosion with a baking soda and water solution. Dry the tray completely before installing the new battery. Check that the battery tray is securely mounted.
7. 7

   Clean battery terminals and cables
   Use a battery terminal cleaner or wire brush to clean the inside of both battery cable terminals and remove any corrosion. Inspect cables for damage, fraying, or excessive corrosion that would require cable replacement.
8. 8

   Install new battery
   Place the new battery in the battery tray, ensuring the positive and negative terminals are oriented correctly (positive terminal toward the front of the vehicle). The battery should sit flush in the tray without rocking.
9. 9

   Install hold-down bracket
   Position the hold-down bracket across the top of the battery and align it with the mounting point at the base. Install the hold-down bolt and torque to specification using a torque wrench.
   Torque spec

   Battery Hold-Down Bolt8 Nm (6 lb-ft)
10. 10

    Connect positive terminal
    Place the positive (+) cable terminal onto the positive battery post. Ensure any fusible link boxes or additional cables are properly positioned. Install the terminal bolt and torque to specification. Do not overtighten as this can damage the terminal or break the bolt.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)
11. 11

    Connect negative terminal
    Place the negative (-) cable terminal onto the negative battery post. Install the terminal bolt and torque to specification. The battery is now connected and the vehicle electrical system is active.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)
12. 12

    Apply terminal protection
    Apply anti-corrosion spray or dielectric grease to both battery terminals to prevent future corrosion. Reinstall the battery cover if equipped.

Reassembly

1. Verify all tools have been removed from the engine compartment
2. Ensure battery terminals are tight and secure
3. Reinstall any battery cover removed during disassembly

Verification

• Turn the ignition to ON position (engine off) and verify dashboard lights illuminate normally
• Start the engine and verify it cranks and starts normally
• Check that all electrical accessories function properly (lights, windows, radio, climate control)
• Verify no warning lights remain illuminated on the dashboard after startup
• Reset the clock and radio presets as needed
• If equipped, reset power window auto-up/down function by fully lowering each window and then holding the switch up for 2 seconds after the window fully closes
• Test drive the vehicle to allow the PCM and transmission to relearn operating parameters

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