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2017–2021 Acura MDX

2017-2021 Acura MDX - Battery Replacement

🔧 Easy 1 hour $180 DIY 2 views

Save $220 by doing it yourself! Shop cost: $400

Quick Video Tutorial

Parts You Need

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Total Cost
$200.00
Part Name Part Number Price Buy
12V Lead Acid Maintenance-Free Battery 24F-AGM $150.00
Battery Terminal Protector BT-PT $5.00
Battery Terminal Cleaner — $10.00
Battery Hold-Down Bracket BHB-24F $20.00
Battery Cable Terminal Ends BCTE-24F $15.00

About prices: shown prices are estimates from typical Amazon listings and change frequently, and cheaper alternatives may be available. Confirm the current price on Amazon before buying.

💡 Pro tip: Order all parts at once to save on shipping

Step-by-Step Instructions

Follow these steps carefully

1

Prepare the vehicle

Park on level ground, set the parking brake, and open the hood (or access panel). Note radio presets and any power-window/sunroof settings that may reset. On EVs/hybrids the 12V battery may be in the cargo area, under a rear seat, or under a cover — not always under the hood. Wear gloves and eye protection.

2

Disconnect negative first

Loosen the negative (−) terminal clamp and remove it first, then disconnect the positive (+). Keep the negative cable clear of the terminal so it cannot spring back into contact.

3

Remove the hold-down

Remove the battery hold-down clamp, J-bolt, or tray fastener. Note the group size stamped on the old battery and the terminal orientation before lifting.

4

Lift out the old battery

Lift the battery straight up and out. Batteries are heavy — use a battery lifting strap if available. Keep it upright to avoid acid spills.

5

Clean the tray and terminals

Clean corrosion from the tray and cable ends with a wire brush and battery terminal cleaner. Dry the tray and check the tray drain is clear.

6

Install the new battery

Set the new battery in the tray matching group size and terminal orientation. Install and tighten the hold-down snugly — do not crush the case.

7

Reconnect positive first

Connect the positive (+) cable first, then the negative (−). Ensure clamps are tight and protected with covers. Do not overtighten soft lead posts.

8

Reset and verify

Start the vehicle and confirm charging/12V system status is normal. Reset the clock/radio. Some vehicles need a window/sunroof or battery registration reset after replacement.

All Done!

Test your repair before closing everything up. If something doesn't work right, double-check your steps.

⚠️ Common Mistakes to Avoid

  • • Disconnecting the positive terminal before the negative terminal, which can cause sparks and potential injury.
  • • Not properly securing the new battery, leading to movement and potential damage during driving.
  • • Failing to clean the battery terminals before installation, resulting in poor electrical contact and potential starting issues.