How to Open Your Key Fob: A Comprehensive Step-by-Step Guide

how to open your key fob

Table of Contents

Key fobs have become an integral accessory in our day-to-day life, primarily if you use a modern vehicle. Whether you need to change a battery or diagnose an issue, knowing how to open your key fob is essential. This guide will provide detailed instructions on how to open different types of key fobs safely without causing any damage.

Let’s begin!

How to Open Your Key Fob

Before You Start: Gather Necessary Tools

Before delving into the process, ensure you have the following tools on hand:

  • Flat-head Screwdriver: A small or medium-sized one is ideal.
  • Plastic Pry Tools: These are optional but can help prevent scratches on your key fob.
  • Soft Cloth or Towel: To place your key fob on during the process to avoid scratches.
how to open your key fob

Opening the Key Fob: Step-by-Step Instructions

1. Identify the Key Fob Type

There are various key fob designs available:

  • Traditional Key Fobs: These usually have a visible seam around the edges.
  • Slide-out Key Fobs: Feature a hidden key that can be slid out.
  • Twist-open Key Fobs: These are less common and require a twisting action to open.

2. Locate the Seam

For traditional and slide-out key fobs, there’s usually a seam that indicates where the two halves of the fob join together. This seam is your point of entry.

3. Insert the Flat-head Screwdriver or Plastic Pry Tool

  • For Traditional Key Fobs: Insert the screwdriver or pry tool gently into the seam. Apply slight pressure and wiggle it to create a gap. Once a small gap is formed, slide the tool around the fob’s perimeter to detach the two halves.
  • For Slide-out Key Fobs: Slide out the actual key portion first. You’ll typically find a small slot or notch where the key rests. Insert your tool here and gently pry apart.

4. Open the Key Fob

Once you’ve created enough of a gap, you can generally separate the two halves of the key fob by hand. Be cautious and gentle to avoid damaging internal components.

5. Conduct Your Business Inside

Whether it’s replacing the battery, inspecting the internal circuitry, or making repairs, ensure you handle the internal components with care. Remember the orientation of any parts you remove to ensure easy reassembly.

6. Reassemble the Key Fob

Carefully align the two halves together, ensuring no internal components are obstructing the closure. Gently press the two halves together until they click into place. For slide-out key fobs, remember to slide the key back into its slot.

how to open your key fob

Additional Tips

  1. Avoid Excessive Force: If the key fob doesn’t open easily, don’t force it. Review your approach and ensure you’re using the correct method for your key fob type.
  2. Clean While You’re Inside: It’s a good opportunity to clean out any debris or dirt that might have accumulated inside the key fob using compressed air.
  3. Always Use Fresh Batteries: If replacing the battery, ensure you’re using a new, high-quality one.


How long does a key fob battery typically last?

Most key fob batteries last between 3 to 5 years. However, frequent use or exposure to extreme temperatures can reduce this lifespan.

What type of battery does my key fob use?

Most key fobs use coin cell batteries, typically in sizes like CR2032 or CR2025. However, it’s always best to refer to your vehicle’s manual or open the key fob to confirm the exact battery type.

Why isn’t my key fob working even after changing the battery?

This could be due to several reasons. The new battery might be defective, the key fob’s internal circuitry might be damaged, or there may be an issue with the car’s receiver. It’s advisable to consult with your vehicle’s dealership or a locksmith for a diagnosis.

Can I still start my car if my key fob battery is dead?

Many modern vehicles come with a backup physical key inside the key fob or a keyless start button that works by holding the key fob close to the ignition. If these methods are unavailable, you may need to replace the battery or consult your dealership.

Can I program a new key fob myself?

Some key fobs can be self-programmed by following specific procedures available in the car’s manual. However, many modern vehicles require professional equipment for programming, necessitating a visit to the dealership or a locksmith.


Key fobs play a pivotal role in today’s automobile landscape, granting both ease of access and heightened protection. At Ace Locksmith, we believe in empowering our customers with knowledge about typical questions and potential issues. If you’re ever uncertain about your key fob’s operation, refer to your car’s guidebook or reach out to our expert automotive team at Ace Locksmith for assistance.

Drive safely and securely!

Sun City:

(623) 777-4399


(623) 800-7720


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