Changing the battery in your Lesus SUV is simpler than you think. This guide walks you through every step—from safety prep to testing the new battery—so you can do it confidently at home. No mechanic required!
Key Takeaways
- Safety first: Always disconnect the negative terminal first and wear protective gear to avoid sparks or acid exposure.
- Know your battery type: Lesus SUVs typically use 12-volt lead-acid batteries; check your owner’s manual for exact specs.
- Use the right tools: A socket wrench (usually 10mm), gloves, safety glasses, and a battery terminal cleaner are essential.
- Reset electronics after replacement: Some models may require radio code re-entry or window recalibration post-installation.
- Dispose of old batteries responsibly: Take your old battery to an auto parts store or recycling center—never throw it in the trash.
- Test before driving: After installation, start the vehicle and check that all electrical systems work properly.
- Consider a memory saver: Use one to preserve radio settings and ECU data during the swap if your model supports it.
How to Change Battery in Lesus SUV: A Complete DIY Guide
If you’ve noticed your Lesus SUV struggling to start, dim headlights, or warning lights on the dashboard, it might be time to replace the battery. Don’t worry—you don’t need to visit a dealership or pay a mechanic hundreds of dollars. With the right tools and a little patience, you can change the battery in your Lesus SUV yourself in under 30 minutes.
This comprehensive guide will walk you through every step of the process, from preparing your workspace to testing your new battery. Whether you drive a Lesus RX, GX, LX, or NX model, the general procedure is very similar. We’ll cover safety precautions, tool requirements, detailed instructions, and troubleshooting tips so you can complete the job confidently and correctly.
By the end of this guide, you’ll not only have a fresh battery powering your SUV but also the knowledge to handle future maintenance tasks with ease.
Why Replace Your Lesus SUV Battery?
Visual guide about How to Change Battery in Lesus Suv
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Car batteries don’t last forever. Most automotive batteries—including those in Lesus SUVs—have a lifespan of 3 to 5 years, depending on climate, driving habits, and maintenance. Over time, the chemical reactions inside the battery degrade, reducing its ability to hold a charge.
Common signs that your Lesus SUV battery needs replacing include:
– Slow engine crank when starting
– Dashboard warning lights (especially the battery or check engine light)
– Dimming headlights or interior lights
– Electrical components acting erratically
– Swollen or leaking battery case
Ignoring these symptoms can leave you stranded. Replacing the battery proactively—especially before winter—can prevent unexpected breakdowns.
Tools and Materials You’ll Need
Visual guide about How to Change Battery in Lesus Suv
Image source: i.ytimg.com
Before you begin, gather all the necessary tools and materials. Having everything ready will make the process smoother and safer.
You’ll need:
– New 12-volt automotive battery (compatible with your Lesus model)
– Socket wrench set (typically 10mm socket for terminals)
– Wrench or pliers (as backup)
– Safety gloves (rubber or nitrile)
– Safety glasses
– Battery terminal cleaner or wire brush
– Baking soda and water (for cleaning corrosion)
– Rag or paper towels
– Memory saver (optional, to preserve radio/settings)
– Battery hold-down clamp tool (if needed)
– Flashlight (for better visibility)
Tip: Check your owner’s manual or the existing battery label to confirm the correct battery group size, cold cranking amps (CCA), and reserve capacity (RC). Most Lesus SUVs use Group 35, 24F, or 34R batteries, but this varies by model and year.
Safety First: Precautions Before Starting
Working with car batteries involves risks—electrical shock, acid burns, and flammable gases. Follow these safety steps to protect yourself and your vehicle.
Wear Protective Gear
Always wear safety glasses and gloves. Battery acid can cause serious burns, and sparks near the battery can ignite hydrogen gas.
Work in a Well-Ventilated Area
Avoid enclosed spaces. Open your garage door or work outside if possible. Hydrogen gas emitted by batteries is highly flammable.
Turn Off the Engine and Remove Keys
Make sure the SUV is completely off. Remove the key from the ignition or disable the smart key system if your model has one.
Disconnect Accessories
Unplug any devices connected to the 12V outlet or USB ports. This prevents accidental short circuits.
Know the Terminal Layout
Lesus SUVs, like most vehicles, have two battery terminals: positive (+) and negative (−). The positive terminal is usually red and marked with a “+,” while the negative is black and marked with a “−.” Always disconnect the negative terminal first to reduce the risk of short circuits.
Step-by-Step Guide to Changing the Battery
Now that you’re prepared, let’s get started. Follow these steps carefully to replace your Lesus SUV battery safely and correctly.
Step 1: Locate the Battery
In most Lesus SUVs, the battery is located in the engine compartment on the driver’s side. However, some models—like the Lesus RX 450h hybrid—have the battery in the trunk or under the rear floor panel.
– For gas-only models (RX 350, GX 460, etc.): Open the hood and look for a rectangular black box with two cables attached.
– For hybrid models (RX 450h, NX 350h): Check the trunk. You may need to lift the floor mat and remove a panel to access the auxiliary 12V battery.
Tip: If you’re unsure, consult your owner’s manual or search online for your specific model and year.
Step 2: Disconnect the Negative Terminal
Using your 10mm socket wrench, loosen the nut on the negative (−) terminal clamp. Do not remove the nut completely yet—just loosen it enough to slide the clamp off the terminal.
Once loose, carefully wiggle the clamp and remove it from the battery post. Tuck it aside so it doesn’t touch any metal parts of the vehicle.
Why negative first? Disconnecting the negative terminal first breaks the ground connection, reducing the risk of a short circuit if your tool accidentally touches both terminals.
Step 3: Disconnect the Positive Terminal
Repeat the process for the positive (+) terminal. Loosen the nut, remove the clamp, and set it aside.
Now both cables are disconnected. You can gently move them out of the way.
Step 4: Remove the Battery Hold-Down Clamp
Most Lesus SUVs use a metal or plastic clamp to secure the battery in place. This prevents it from shifting during driving.
Use your socket wrench or a screwdriver (depending on the clamp type) to remove the bolts or screws holding the clamp. Once removed, lift the clamp away.
Some models have a J-bolt or strap-style clamp. In that case, unscrew the nut at the top and slide the clamp out.
Step 5: Lift Out the Old Battery
Car batteries are heavy—typically 30 to 50 pounds. Use proper lifting technique: bend your knees, keep your back straight, and lift with your legs.
Grasp the battery by the handles (if present) or by the sides. Carefully lift it straight up and out of the tray.
Place the old battery on a stable, non-conductive surface like a wooden board or cardboard. Never place it on concrete, as it can discharge faster.
Step 6: Clean the Battery Tray and Terminals
Over time, corrosion (a white or green powdery substance) can build up on the battery tray and cable terminals. This can interfere with electrical connections.
To clean:
1. Mix a tablespoon of baking soda with a cup of water.
2. Dip an old toothbrush or wire brush into the solution.
3. Scrub the tray, terminals, and cable clamps gently.
4. Wipe everything dry with a clean rag.
This step ensures a solid connection for your new battery.
Step 7: Install the New Battery
Before placing the new battery, double-check that it’s the correct type and fully charged. Most new batteries come pre-charged, but it’s good to verify.
Position the new battery in the tray, matching the terminal orientation (positive on the right or left, depending on your model). The terminals should align with the cables.
Secure the battery with the hold-down clamp. Tighten the bolts or screws firmly—don’t overtighten, as this can crack the battery case.
Step 8: Reconnect the Terminals
This time, connect the positive terminal first.
Slide the positive (+) cable clamp onto the positive post. Tighten the nut securely with your wrench.
Then, connect the negative (−) cable to the negative post and tighten the nut.
Tip: Apply a thin layer of dielectric grease or battery terminal protector spray to the terminals after tightening. This prevents future corrosion.
Step 9: Test the Installation
Close the hood (or trunk, if applicable) and start your Lesus SUV.
Listen for a smooth engine start. Check that the dashboard lights come on normally and that there are no warning indicators.
Turn on the headlights, radio, and air conditioning to ensure all electrical systems are functioning.
If everything works, you’ve successfully changed the battery!
Troubleshooting Common Issues
Even with careful installation, you might encounter a few hiccups. Here’s how to handle them.
Battery Won’t Hold a Charge
If your new battery dies quickly, it could be due to:
– A faulty alternator not charging the battery
– Parasitic drain (something drawing power when the car is off)
– Incorrect battery installation
Use a multimeter to test the battery voltage. A fully charged battery should read 12.6 volts or higher with the engine off. With the engine running, it should be 13.7–14.7 volts.
If the voltage is low while running, the alternator may need inspection.
Radio or Settings Reset
Some Lesus models require a radio code after battery replacement. This code is usually found in the owner’s manual or on a card in the glove box.
If you don’t have the code, contact a Lesus dealer or check online forums for your model.
You may also need to recalibrate power windows or sunroof. Refer to your owner’s manual for the reset procedure.
Corrosion Returns Quickly
If corrosion builds up again within weeks, check for:
– Loose or damaged cable connections
– Overcharging alternator
– Battery case leaks
Tighten connections and have your charging system tested at an auto shop.
Memory Saver Didn’t Work
A memory saver plugs into the OBD-II port or 12V outlet to preserve settings. If it didn’t work:
– Ensure it was properly connected during the swap
– Check that your model supports memory saving
– Some advanced systems (like navigation or adaptive cruise control) may still require dealer reset
Tips for Long Battery Life
Once your new battery is installed, follow these tips to maximize its lifespan:
– Drive regularly: Short trips don’t allow the alternator to fully recharge the battery.
– Turn off lights and accessories when the engine is off.
– Use a battery tender if the vehicle sits unused for weeks.
– Keep terminals clean and tight.
– Avoid extreme temperatures when possible (park in shade or garage).
When to Call a Professional
While most Lesus SUV owners can change the battery themselves, consider professional help if:
– You’re uncomfortable working with electrical systems
– The battery is in a hard-to-reach location (e.g., under seats or deep in the trunk)
– You suspect alternator or wiring issues
– Your SUV has advanced driver-assistance systems (ADAS) that may need recalibration
Dealerships and certified mechanics have the tools and expertise to handle complex integrations.
Conclusion
Changing the battery in your Lesus SUV is a straightforward task that saves time and money. With basic tools, safety precautions, and this guide, you can complete the job in under half an hour.
Remember: always disconnect the negative terminal first, clean corrosion, and test your work. Dispose of the old battery responsibly, and enjoy the peace of mind that comes with a reliable starting system.
Regular maintenance like this keeps your Lesus running smoothly for years to come. Now that you know how to change the battery, you’re one step closer to being a confident DIY car owner.