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2018–2022 Honda Accord (not hybrid)

12-volt battery replacement

Good first job: 3 tools, no lifting, about 30 min

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Terminal nuts26–52 in-lb
Hold-down nuts83 in-lb
OrderNegative off first
AfterSteering relearn

What you need

Links open Amazon.

Parts

  • 1
    12 V battery (1.5L engine only)Same size as the original; idle-stop type if the car has Auto Idle StopCopy the old battery's label; idle-stop type if Auto Idle Stop.
    Amazon
  • 1
    12 V battery (2.0L engine only)Same size as the original; idle-stop type if the car has Auto Idle StopLarger than the 1.5L battery; copy the old battery's label.
    Amazon

Tools

  • 1
    Torque wrench, inch-poundTerminal nuts 26-52 in-lb; hold-down plate nuts 83 in-lbNeeds 26 to 83 in-lb; ft-lb wrenches can't go this low.
    Amazon
  • 1 set
    Socket set with ratchet1/4 inch fits the torque wrench; loosen with the ratchet, not it.
    Amazon
  • 1 pair
    Safety glassesBatteries can leak or burst; wear them while lifting it.
    Amazon

Supplies

  • 1 tube
    Multipurpose greaseA thin coat on both terminals.
    Amazon

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Every step in this video (11)
  1. It's on the driver's side. Negative post with a sensor, positive under a flip-up cover, and a hold-down plate on top.
  2. Open the driver's door and leave it open. Switch off, then wait 3 minutes.
  3. Negative off first. Loosen the nut and lift the terminal and sensor off together, not by the sensor's plug.
  4. Flip the positive cover open, loosen the nut, and lift the cable off.
  5. Remove the plate nuts and plate, slide off the insulator jacket, and lift the battery straight out.
  6. New battery in, facing the same way. Jacket and plate back on, nuts to 83 inch-pounds. Tighter bends the plate.
  7. Positive back on first. Terminal nuts take only 26 to 52 inch-pounds. Snug, not cranked.
  8. Negative and sensor last, same torque. Grease both terminals, then close the cover.
  9. The VSA and tire pressure lights come on. On level ground, engine running: one full turn left and back, one right and back, then quarter turns left, right, left, right.
  10. With Auto Idle Stop, let it learn the battery: Accessory, then On, then start and idle a minute, then off. Five times.
  11. Final check: terminals don't turn by hand, the battery doesn't move, and the warning lights are out.

Written by our repair experts, checked against real jobs mechanics logged. If your owner’s manual says something different, go with the manual.

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