2020 Hyundai Elantra Key Fob Battery Replacement: Easy Steps & Expert Tips


Replace your 2020 Hyundai Elantra key fob battery effortlessly with a CR2032 coin. Just pop out the metal key, use a flathead to open the fob, swap the battery, ensuring it faces correctly, and snap it shut. Quick and easy, this fix enhances your fob’s performance, making car access and remote start smoother. Ready to give it a try?

What Type of Battery Does a 2020 Hyundai Elantra Key Fob Use?

The 2020 Hyundai Elantra key fob primarily uses a CR2032 3V lithium coin cell battery, although CR2025 and CR2016 are also compatible with varying fitment.

These batteries are compact with a diameter typically around 20mm, designed specifically for small electronic devices like key fobs.

Among the brands available, Energizer, Panasonic, and Duracell provide options that offer different lifespans and price points, ensuring flexibility in choice based on user preference and budget.

Battery Specifications

The 2020 Hyundai Elantra key fob requires a CR2032 3V lithium coin cell battery.

It’s reliable and fits perfectly in small devices like key fobs.

  1. Battery Type: CR2032 3V lithium coin cell
  2. Voltage: 3 volts
  3. Size: Coin cell
  4. Compatible Alternatives: CR2025 and CR2016 might work, but always check the manual to ensure they fit and function properly.

Battery Brand Options

A 2020 Hyundai Elantra key fob uses a CR2032 3V lithium coin cell battery. It’s known for being reliable in small devices.

BrandAvg. LifespanPrice Range
Energizer3–4 years$3–$5
Panasonic2–3 years$2–$4
Duracell2–3 years$3–$6
Amazon Basics1.5–2 years$1–$3

Each brand brings something different. Energizer is often recommended by manufacturers for its reliability. Amazon Basics offers low-cost options. You can pick a brand based on how much you are willing to spend and how often you use your key fob.

How Do You Change the Battery in a 2020 Elantra Key Fob?

To change the battery in a 2020 Hyundai Elantra key fob, one needs a small flathead screwdriver and a new CR2032 battery.

The process involves carefully opening the fob, replacing the old battery while ensuring the correct orientation, and reassembling the unit.

This task is crucial for maintaining the functionality of the remote access and ignition features of the vehicle.

Step-by-Step Guide

To change the battery in a 2020 Hyundai Elantra key fob, you need a new CR2032 3V lithium coin cell. Follow these steps:

  1. Remove the physical key: Press the release button on the side of the fob and pull out the metal key.
  2. Open the fob: Insert a small flathead screwdriver or a coin into the slot where the key was and gently pry the fob open.
  3. Replace the battery: Take out the old battery. Remember, the new battery goes in with the positive side facing down.
  4. Reassemble the key fob: Put the two halves of the fob back together until they click and slide the physical key back in place.

Required Tools

To replace the battery in a 2020 Hyundai Elantra key fob, you need a small flathead screwdriver or a coin and a CR2032 battery. Here are the steps and tools needed:

Required Tools:

  1. Small Flathead Screwdriver or Coin: Used to pry open the key fob case.
  2. New CR2032 Battery: The specific battery model for the 2020 Elantra key fob.
  3. Non-conductive Tweezers (optional): Helpful for placing the new battery without direct contact.
  4. Soft Cloth: Useful for cleaning the battery compartment.

Start by using the screwdriver or coin to open the key fob.

Then, clean the compartment with the cloth, place the new battery using tweezers if available, and close the case back up.

How Long Does a 2020 Elantra Key Fob Battery Last?

The battery in a 2020 Hyundai Elantra key fob typically lasts between 2 to 3 years, depending on usage patterns and environmental conditions.

Factors such as frequent use and exposure to extreme temperatures can significantly diminish battery life.

Battery Life Factors

This depends on how often it’s used, the temperature it’s kept at, and how close it is to the car.

Factors that affect the battery life of Hyundai Elantra key fobs:

  1. Frequency of Use: Using the key fob often will drain the battery quicker.
  2. Environmental Conditions: Both very hot and very cold temperatures can reduce battery life.
  3. Proximity to Vehicle: If the key fob is near the car a lot, it uses more battery by constantly connecting to the car’s sensors.
  4. Battery Quality: Better batteries like those from Energizer or Panasonic last longer than cheaper ones.

Key Fob Battery Life for 2020 Hyundai Elantra

Battery life for a 2020 Hyundai Elantra key fob varies by how often you use it. Here’s what you can expect:

Usage FrequencyAvg. Battery LifeNotes
Daily (10+ clicks)1–1.5 yearsFrequent use drains it faster
Moderate (5 clicks/day)2–3 yearsTypical use
Rare (1–2 clicks/day)3–4 yearsLeast use preserves battery

Temperature and how close the fob is to the vehicle also affect the battery life. Knowing this helps you keep your key fob working well without unexpected battery replacements.

What Are the Signs of a Dying Key Fob Battery?

A dying Hyundai Elantra key fob battery manifests through several clear symptoms.

Owners may notice reduced range, delayed button responses, or no LED light activation on the fob.

Such signs are critical indicators that the battery needs immediate replacement to maintain functionality.

Warning Signs

If your Hyundai Elantra key fob battery is running low, you’ll notice a few clear signs:

  1. Reduced Remote Range: The key fob works only at closer distances.
  2. Delayed Response: Pressing the fob buttons leads to a slow reaction from the car.
  3. Dashboard Alert: Your car’s dashboard shows a “Key Fob Battery Low” message.
  4. Non-Responsive LED: The LED light on the fob stays off when you press the buttons.

Testing Methods

To check the battery strength of a Hyundai Elantra key fob, measure its voltage with a multimeter to ensure it’s 3 volts or higher.

The car’s dashboard might also show a “Key Fob Battery Low” alert if the battery is weak.

Test the key fob battery:

  1. Use a Multimeter: Ensure the voltage is 3 volts or more.
  2. Observe Warning Signs: Look for ‘Key Fob Battery Low’ alerts on the dashboard.
  3. Check Remote Functionality: Test how far and how well the fob works.
  4. Inspect LED Indicator: Check that the LED light flashes when you press the buttons.

Where Can You Buy a Replacement Key Fob Battery?

Replacement batteries for the Hyundai Elantra key fob can be purchased from various retailers including AutoZone, Amazon, Walmart, and directly from Hyundai dealers.

These options offer differing price ranges and availability, from budget-friendly aftermarket choices to more expensive OEM batteries.

Evaluating the pros and cons of genuine versus aftermarket batteries is crucial for ensuring compatibility and maximizing the lifespan of the key fob.

Retailer Options

You can buy replacement CR2032 batteries for a 2020 Hyundai Elantra from AutoZone, Amazon, or directly from Hyundai dealers. Prices and availability vary:

RetailerPrice (CR2032)Availability
AutoZone$4–$6In-store
Amazon$2–$5Online
Hyundai Dealer$8–$12OEM genuine

This table shows where you can find the battery you need at different costs and buying options. Choose based on how much you want to spend and how quickly you need the battery.

Genuine vs Aftermarket

When selecting a key fob battery for your Hyundai Elantra, consider both genuine and aftermarket options. Genuine batteries cost $8-$12 and ensure compatibility, while aftermarket batteries are cheaper ($1-$6) but vary in quality.

  1. Genuine Hyundai Batteries:
    • Pros: Guaranteed compatibility, higher reliability.
    • Cons: Higher cost.
  2. Aftermarket Brands (Energizer, Panasonic, Duracell, Amazon Basics):
    • Pros: Lower cost, more purchasing options.
    • Cons: Variable quality and longevity.
  3. Availability:
    • Genuine: Mostly available at dealerships.
    • Aftermarket: Widely available online and in retail stores.
  4. Price Range:
    • Genuine: $8-$12 per battery.
    • Aftermarket: $1-$6 per battery, depending on the brand.

What Should You Do If Your Key Fob Stops Working?

When a Hyundai Elantra key fob stops working, the owner should first troubleshoot the issue before seeking emergency access.

Troubleshooting might involve checking the battery’s orientation and charge, ensuring there is no signal interference from nearby electronics, and attempting a reprogramming of the fob if necessary.

For cases where the fob is unresponsive, knowing how to access the vehicle manually using the physical key hidden within the fob is crucial.

Troubleshooting Steps

If your Hyundai Elantra key fob isn’t working, start by checking the battery is installed correctly. If it still doesn’t work, try these steps:

  1. Inspect for damage: Look over the key fob for cracks or wear.
  2. Clean the contacts: Remove any dirt on the battery contacts with a dry cloth.
  3. Reprogram the key fob: You might need to reset the fob. Check the car’s manual or get help from a professional.
  4. Try a new battery: If the problem continues, use a new battery to see if that fixes it.

Emergency Access Methods

If your Hyundai Elantra’s key fob stops working, you can still get into your car and start it.

  1. Unlock the Door: Find the physical key inside the fob to unlock the driver’s door manually.
  2. Start the Engine: Hold the dead key fob close to the start button while pressing the brake pedal to start the engine.
  3. Alarm Deactivation: If an alarm sounds after opening the door, put the key fob into the key port if your car has one.
  4. Seek Assistance: If these steps don’t work, call Hyundai roadside assistance or a locksmith.

How Can You Extend Key Fob Battery Life?

To extend the battery life of a Hyundai Elantra key fob, users should minimize unnecessary button presses, store the fob away from the vehicle, and consider replacing the battery every two to three years.

Proper storage involves keeping the fob in a cool, dry place and using a signal-blocking pouch to prevent unintended battery drain.

Comparatively, storing the fob near the vehicle or in extreme temperatures can significantly reduce battery life.

Battery Conservation Tips

To extend the life of your Hyundai Elantra key fob battery, follow these practical tips:

  1. Minimize Usage: Only press buttons when needed to save battery power.
  2. Turn Off Features: Switch off unused functions to conserve energy.
  3. Smart Handling: Protect the key fob from water and extreme heat or cold.
  4. Routine Checks: Regularly test the battery voltage to know when a replacement is due.

Storage Recommendations

Store your Hyundai Elantra key fob in a cool, dry place away from devices that might drain its signal. Here are some do’s and don’ts to keep your fob working well:

Proper StorageImproper StorageImpact on Fob Functionality
In a cool, dry drawerNear car or in direct sunlightReduces risk of battery drain
Inside a Faraday pouchLoose in a bag with electronicsMinimizes unwanted signal drain
Away from other wireless devicesClose to WiFi routersPrevents signal interference
In a stable temperature settingIn high humidity environmentsMaintains battery integrity
Separated from keys and coinsIn pockets with metal objectsAvoids physical damage to fob

Following these tips can help keep your key fob in good shape and its battery lasting longer.

What Features Stop Working When the Key Fob Battery is Low?

When the battery in a Hyundai Elantra key fob grows low, certain features such as keyless entry and remote start begin to fail first.

These functionalities rely heavily on a strong battery signal to operate effectively.

In situations where these features are compromised, Hyundai provides backup systems, including the use of a physical key for entry and a manual start option by pressing the fob against the start button while braking.

Affected Features

When the battery in a Hyundai Elantra key fob gets low, some features stop working properly.

First, you might not be able to unlock the doors or start the car without a key. Other problems include difficulty with the car alarm and opening the trunk.

List of features affected by a low key fob battery:

  1. Keyless Entry: Unlocking the doors without a key becomes unreliable.
  2. Remote Start: You can’t start the car remotely, which means you need to start it manually.
  3. Alarm Activation: It gets hard to turn the car’s alarm on or off remotely.
  4. Trunk Opening: The trunk may not open reliably with the remote.

Backup Systems

Hyundai Elantra is equipped with backup systems for emergencies when the key fob battery is low. These systems include a physical key for unlocking doors and a manual method for starting the engine.

FeatureEmergency MethodDescription
Door AccessPhysical Key in Door SlotEnables manual unlocking of doors.
Engine StartingPress Fob Against Start ButtonAllows engine ignition without remote signal.
Trunk AccessPhysical Key or Inside ReleaseManual trunk opening if equipped.
Alarm SystemPhysical Key Disables AlarmDeactivates the security alarm manually.

People Also Ask

How much does a 2020 Hyundai Elantra key fob battery cost?

A 2020 Hyundai Elantra key fob battery usually costs about $2 to $12.

You can buy cheaper ones online or at stores like Walmart, or more expensive ones from a Hyundai dealer.

They use a CR2032 type battery.

Can you start a 2020 Elantra with a dead key fob?

Yes, you can start a 2020 Elantra even if the key fob battery is dead.

Just press the key fob against the start button and push the brake pedal at the same time to start the car.

This works because the start button can still detect the key fob.

Does AutoZone replace key fob batteries?

Yes, AutoZone sells key fob batteries like the CR2032 but they don’t replace them for you.

You can buy brands like Energizer and Duracell there.

If you need help, they can tell you which battery to get but you’ll need to change it yourself or find someone else to do it.

What happens if key fob battery dies while driving Hyundai Elantra?

If your Hyundai Elantra’s key fob battery dies while driving, the car will keep running until you turn it off.

To start the car again with a dead fob, press it against the start button while pressing the brake.

Replace the battery soon.

Wrapping Up

Replacing your 2020 Hyundai Elantra key fob battery with a CR2032 is simple and can save you from unexpected delays. Keep your day running smoothly by staying ahead of those low-battery dramas.

Justin

Hi, I'm Justin, a car enthusiast turned mechanic. The garage is my second home, where each engine and part tells a unique story. Seeing car owners frustrated with issues inspired me to start DIY Car Expert, offering reliable solutions to tackle problems with ease. 🚗✨

Recent Posts