The battery on a 2018 Jeep Grand Cherokee is hiding under a panel in the passenger footwell, not under the hood. If you are wondering where is the battery on a 2018 jeep grand cherokee, you are not alone—this is one of the most common questions owners ask. Most drivers expect to find it under the hood, but Jeep moved it to a different location for this model year.
Finding the battery can be tricky if you don’t know where to look. The good news is that once you know the spot, it is easy to access. You will need to remove a small panel near the passenger’s feet.
This article will show you exactly how to find and access the battery. We will also cover jump-starting, replacing, and common issues. Let’s get started.
Where Is The Battery On A 2018 Jeep Grand Cherokee
The battery is located inside the passenger compartment, on the floor near the front of the passenger seat. It sits under a plastic trim panel that covers the footwell area. You cannot see it without removing this panel.
This location is unusual but has a reason. Jeep placed the battery here to improve weight distribution and protect it from engine heat. It also keeps the battery safe from water and dirt.
To access the battery, you need to open the front passenger door. Look down at the floor near the firewall, just behind the glove box. You will see a rectangular plastic cover.
Step-By-Step Guide To Access The Battery
- Open the front passenger door fully.
- Remove the floor mat if one is present.
- Locate the plastic trim panel on the footwell wall closest to the engine.
- Use a flathead screwdriver or trim tool to pry the panel off gently.
- Pull the panel straight out—it snaps into place with clips.
- You will now see the battery sitting in a plastic tray.
- The positive terminal is on the left, and the negative is on the right.
Be careful when prying the panel. The clips can break if you use too much force. Work slowly and evenly.
What The Battery Looks Like
The battery is a standard 12-volt lead-acid unit. It is about the size of a typical car battery but sits sideways. The terminals face toward the rear of the vehicle.
You will see two cables attached to the terminals. One is red for positive, and one is black for negative. The battery is secured by a metal bracket that holds it in place.
If you have a diesel engine model, the battery might be slightly different. The location is the same, but the battery size may vary. Always check your owner’s manual for specifics.
Why The Battery Is Not Under The Hood
Many drivers are confused when they open the hood and see no battery. The engine bay has a fuse box and other components, but no battery. This is a design choice by Jeep.
Placing the battery inside the cabin helps with weight balance. It also reduces exposure to extreme temperatures. This can extend battery life.
Another reason is to free up space under the hood. The engine bay is tight in the Grand Cherokee. Moving the battery allows for better airflow and easier access to other parts.
Some owners think this location is inconvenient. But once you know where it is, it is actually easy to reach. You don’t need to lift a heavy hood or lean over the engine.
Jump-Starting A 2018 Jeep Grand Cherokee
Jump-starting this vehicle requires a different approach. You cannot connect jumper cables directly to the battery inside the cabin. Instead, use the terminals under the hood.
Jeep provides remote jump-start posts in the engine bay. These are located near the fuse box on the passenger side. Look for a red plastic cover over the positive terminal.
Here is how to jump-start safely:
- Park the working vehicle close but not touching yours.
- Turn off both vehicles and remove keys.
- Open the hood of your Grand Cherokee.
- Locate the positive remote terminal under the red cover.
- Connect the red jumper cable to this terminal.
- Connect the other end of the red cable to the working battery’s positive terminal.
- Connect the black cable to the working battery’s negative terminal.
- Connect the other end of the black cable to an unpainted metal surface on your engine block.
- Start the working vehicle and let it run for a few minutes.
- Start your Grand Cherokee.
- Disconnect cables in reverse order.
Never connect jumper cables directly to the battery inside the cabin. This can damage the vehicle’s electrical system. Always use the remote terminals under the hood.
What If The Battery Is Completely Dead
If the battery is completely dead, the remote terminals might not work. In this case, you may need to access the battery directly. But this is rare.
You can try charging the battery with a trickle charger. Connect the charger to the remote terminals under the hood. This is safer than connecting to the battery itself.
If the battery will not hold a charge, it likely needs replacement. We will cover that next.
Replacing The Battery In A 2018 Jeep Grand Cherokee
Replacing the battery is straightforward but requires caution. The battery is heavy and contains acid. Wear gloves and safety glasses.
Here is the step-by-step replacement process:
- Remove the plastic trim panel from the passenger footwell.
- Disconnect the negative (black) cable first using a 10mm wrench.
- Disconnect the positive (red) cable next.
- Remove the metal bracket that secures the battery.
- Lift the battery straight out of the tray. It is heavy.
- Place the new battery in the tray with terminals facing the same direction.
- Secure the bracket and tighten it.
- Connect the positive cable first, then the negative.
- Replace the trim panel by snapping it back into place.
Make sure the new battery has the same specifications as the old one. Check the group size, cold cranking amps, and terminal placement. Most models use a Group 94R battery.
Battery Specifications For The 2018 Grand Cherokee
- Group Size: 94R (H7)
- Cold Cranking Amps: 700-800 CCA
- Voltage: 12 volts
- Terminal Layout: Left positive, right negative
- Weight: Approximately 40-45 pounds
You can buy an OEM battery from a Jeep dealer or an aftermarket one from auto parts stores. Brands like Optima, Interstate, and DieHard are popular choices.
Some models with the 5.7L V8 engine may require a different battery. Check your owner’s manual for the exact part number. The location is the same for all engine types.
Common Problems With The Battery Location
Having the battery inside the cabin can cause a few issues. One problem is that you might forget where it is. Another is that spills or leaks can damage the carpet.
Battery acid can eat through carpet and metal. If you notice corrosion on the terminals, clean it immediately. Use a mixture of baking soda and water to neutralize acid.
Another issue is that the battery can be harder to jump-start in an emergency. Not everyone knows about the remote terminals under the hood. Keep this information handy.
Some owners report that the trim panel clips break easily. If this happens, you can buy replacement clips at any auto parts store. They are inexpensive.
How To Prevent Battery Drain
Battery drain is a common complaint with the Grand Cherokee. The vehicle has many electronic systems that can drain the battery if left on. Here are some tips:
- Turn off all lights and accessories when parked.
- Do not leave the key fob near the vehicle.
- Check for parasitic drains from aftermarket accessories.
- Use a battery maintainer if the car sits for long periods.
- Test the battery voltage monthly with a multimeter.
A healthy battery should read about 12.6 volts when fully charged. If it drops below 12.4 volts, it may need charging or replacement.
Tools You Will Need
To access or replace the battery, you need a few basic tools. Most are common household items. Here is a list:
- Flathead screwdriver or trim removal tool
- 10mm wrench or socket
- Gloves and safety glasses
- Baking soda and water for cleaning
- Wire brush for terminal cleaning
- New battery (if replacing)
You do not need any special tools. The trim panel pops off with a simple pry tool. The bolts are standard metric sizes.
Frequently Asked Questions
Can I jump-start a 2018 Jeep Grand Cherokee from the battery inside the cabin?
No, you should not connect jumper cables directly to the battery inside the cabin. Always use the remote terminals under the hood to avoid electrical damage.
How often should I replace the battery in a 2018 Grand Cherokee?
Most batteries last 3 to 5 years. If you live in a hot climate, the battery may need replacement sooner. Test it annually after the third year.
What happens if I spill battery acid in the footwell?
Neutralize the acid immediately with baking soda and water. Then clean the area with a damp cloth. Acid can damage carpet and metal if left untreated.
Is the battery location the same for all 2018 Grand Cherokee trims?
Yes, all trims including Laredo, Limited, Overland, Summit, and Trackhawk have the battery in the passenger footwell. The location does not change with engine type.
Can I install a larger battery in the same location?
It is not recommended. The battery tray is designed for a specific size. A larger battery may not fit or could cause electrical issues. Stick to the recommended group size.
Final Tips For Battery Maintenance
Keep the battery terminals clean and tight. Corrosion can cause starting problems. Check the connections every few months.
If you notice the engine cranking slowly, test the battery first. A weak battery is often the cause. Do not assume the alternator is bad.
Always disconnect the negative cable first when working on the battery. This prevents short circuits. Reconnect the positive cable first when installing a new battery.
The battery location on the 2018 Jeep Grand Cherokee is unusual but practical. Once you know where to look, it is easy to access. Keep this guide handy for future reference.
If you have any other questions about your Grand Cherokee, consult your owner’s manual or a certified mechanic. Regular maintenance will keep your vehicle running smoothly for years to come.