Quick answer: Battery Replacement on a 2019–2024 Genesis G70 is rated Easy and takes about 30-90 minutes. You'll need 2 tools for this job, and parts cost about $180. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name |
Part Number |
Price |
Buy |
| Replacement 12-volt battery for 2019-2024 Genesis G70; verify group size, CCA, terminal layout, and VIN fitment |
— |
$180.00 |
|
| Anti-corrosion terminal protectant or felt washers (optional) Optional |
— |
$8.00 |
|
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
Confirm the trunk battery and your symptoms
Unlike most cars, the 2019-2024 Genesis G70 keeps its 12-volt battery in the trunk, buried under the spare wheel well: you will remove the trunk panel, the spare wheel, the spare-wheel bracket, and then the battery hold-down bracket to reach it. The factory fitment is a large AGM battery of about 80Ah (Group H7/94R or H8, roughly 850 CCA), and you should replace it with the same type, since this ISG-equipped car depends on the AGM chemistry. Read the group size and Ah rating from the label on your old battery or your owner's manual. Confirm the battery is the true problem first: slow cranking, a charging warning, or electrical glitches with a battery older than four years point to replacement, while a battery that drains overnight may signal a parasitic draw instead.
🔧 Mechanic's note — Tom Becker
I've learned this one the hard way — I confirm the battery is the true problem first: slow cranking, a charging warning, or electrical glitches with a battery older than four years point to replacement; overnight drain may signal a parasitic draw.
2
Park
Park the G70 on level ground, set the parking brake, and switch the engine fully off. Take the key fob away from the car. Wear safety glasses and gloves, and keep metal tools away from the battery terminals.
3
Access and disconnect the trunk battery
Open the trunk and lift out the trunk floor panel. You now have access to the battery. Disconnect the negative (-) cable first, then remove the positive (+) battery fuse box from the terminal, following the owner's manual diagram for your model year.
4
Install, vent, and reassemble the trunk
Set the new AGM battery into the well in the same orientation as the old one, and clean the cable ends and fuse-box contacts with a wire brush if corroded. Reconnect the vent hose to the battery's vent fitting so gases escape outside the car. Reinstall the hold-down mounting bracket and tighten it so the battery cannot vibrate while driving, which can damage the case and plates.
5
Verify operation and reset the power trunk
Start the G70 and confirm there are no warning lights. Reset the clock and radio presets if they were lost. Verify charging voltage around 13.5 to 14.8 volts. Stop and recheck your work if the battery feels hot or a charging fault appears, and recycle the old battery for the core refund.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Buying by appearance instead of group size, CCA, polarity, and hold-down fit
- • Shorting the positive terminal to the body with a metal tool
- • Lifting the battery by damaged terminals or leaving it unsecured
- • Skipping battery registration, window/clock resets, or charging-system checks when required
- • Assuming a new battery fixes a parasitic draw or charging fault
