Quick answer: Battery Replacement on a 2016–2024 Volvo XC90 is rated Easy and takes about 30–45 minutes. You'll need 5 tools for this job, and parts cost about $140. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name |
Part Number |
Price |
Buy |
| Correct group-size battery |
— |
$140.00 |
|
| Terminal cleaner Optional |
— |
$8.00 |
|
| Terminal protectant Optional |
— |
$7.00 |
|
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Step-by-Step Instructions
Follow these steps carefully
1
Park and open the cargo area
You will be doing all the work from the cargo area, because on these Volvos the main 12V battery lives in the trunk, not under the hood — don't go looking under the bonnet.
🔧 Mechanic's note — Tom Becker
I've watched people get this wrong: You will be doing all the work from the cargo area, because on these Volvos the main 12V battery lives in the trunk, not under the hood — don't go looking under the bonnet.
2
Get to the battery behind the left trim
Lift the cargo floor panel out of the way and look at the left side of the load compartment. A side trim panel hides the battery; lift or unclip it. Set the panels aside where they won't get stepped on.
3
Disconnect negative first, then positive
Find the negative terminal near the rear of the battery and loosen its nut with a 10mm socket. Lift the cable off and push it aside so it can't spring back. Then tackle the positive terminal, which hides under a red plastic box in the middle of the battery — flip that lid up and loosen its nut too. Always disconnect the negative cable first.
4
Free the black box sitting on top
Undo the bolt at its rear and release the clips on its sides, then lift the whole box clear and set it gently aside. Don't force the wiring — let it rest out of your way while the cables stay attached to it.
🔧 Mechanic's note — Tom Becker
Don't force the wiring — let it rest out of your way while the cables stay attached to it. I don't skip this anymore.
5
Undo the hold-down and lift the battery out
Undo it and lift the bracket away. Pull the vent hose off the side of the old battery, then lift the battery straight up and out of the well.
6
Set the new battery in place
Slide the new battery into the well in exactly the same orientation as the old one, terminals facing the same way. Push the vent hose onto the new battery's vent port so gases are routed outside the cabin.
7
Reconnect, test, and reset
Replace the trim and cargo floor panels. Start the engine and check that everything works — radio presets, clock, and one-touch windows may have reset, and some vehicles require a battery registration or idle relearn, so check your owner's manual for what your model needs.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Trying to lift the battery past the black box on top instead of unbolting it first
- • Forgetting to move the vent hose from the old battery to the new one
- • Cracking the cargo-area trim panel clips by prying them the wrong way
- • Mistaking the small support battery under the hood for the main 12V battery
