Replacing Car Key Battery

Your Car Key Battery Replacement Guide

Do you need your car key battery changed? We all know the frustration of dealing with a bad key. It’s aggravating, to say the least, especially when it happens as you’re running late. And let’s face it – it always has bad timing.

Prepare in advance; so, it doesn’t catch you off-guard when it happens.

Equipped with this knowledge life’s interruption won’t be a cause for panic. It will be a great opportunity to put your knowledge to use. Here is everything you need to know about key fob battery.

What Happens if Your Car Key Battery Dies?

The key fob battery is an integral part of a car key. The battery powers the key and operates the remote function. With push-to-start (PTS) vehicles, the key is necessary to power up the car in order to use it. As such, a dead battery can prevent your car from starting.

If your battery dies, you can change it. You can do this yourself or reach out to a professional.

Most smart keys are equipped with an emergency blade (E-blade). An emergency blade is a mechanical key placed inside the fob. It’s used to open the drivers’ side door in an emergency (i.e. dead battery).

How do I know if my car key battery is dying?

If you are experiencing any of the following, it may be a sign to change your battery.

Signs your key fob needs a battery replacement.

The transmitter loses its range when the fob battery becomes weaker. If you notice you have to be a lot closer to your car than usual, that’s a sign that your range is decreasing. This is an indicator to change your battery. Other signals include:

  • If your key is not giving out any signal
  • If you have to press the button repeatedly before your vehicle accepts the signal
  • If your key remote is inconsistent or unreliable

Can I replace the battery in my key fob?

Yes, you can. DIY is quick, simple, and cheap. To do this, pry apart the key fob and replace the coin battery inside with a new one. If you are not mechanically inclined you can always call Keyway Locksmith.

When changing the battery use caution. The plastic tabs that hold the fob together could break easily. Be careful not to break them in the process.

When replacing the battery, notice the way it’s installed. It’s important to install the new battery the same way, or it won’t work.

If you changed the battery and it still doesn’t work, then the key needs further examination by a professional.

How much does a car key battery cost?

A car key battery usually costs about $5. The price may vary a bit based on the quantity you get and where you get it.

Where to get car key battery replacement

You can find the replacement battery online or in electronic stores. Some stores that carry it are Amazon, Walmart, and AutoZone. Before buying make sure you know which battery fits your key.

How long does my key battery last?

The key fob on the smart key may last 2-3 years or 4-6 years a regular key. The difference is the frequency of use. Smart keys have receivers and have to communicate with the vehicle when it’s near or inside the car.

How to change the battery in the key fob?

Need a video guide on how to replace a battery on your key fob? If so, check out the video tutorials below from FobBattery on how to replace battery on different types of keys and remotes.

Honda RHK battery replacement

Honda Keyfob Battery Replacement

How to change battery in Toyota Flip Key

Toyota Key Fob Battery Replacement

Prius Key Battery Replacement

Smart key battery replacement tutorial

How to replace battery on chevy remotes

How to replace battery on a Ram key

Replacing BMW Key Fob Battery

2019 Hyundai Santa Fe Flip Key Replacement 

Hyundai Santa Fe Smart Key Battery Replacement

Chevy Flip Key Battery Replacement

Replace Jeep Tombstone Key

Jeep Teardrop shaped key battery replacement

What size battery do I need for my key fob?

Most car keys take CR2032 and CR2025 3-Volt batteries, but that doesn’t mean they fit every key fob. Different cars take different batteries. You can find the exact type in the owner’s manual.

If the owner’s manual is not handy, you can always check your current key fob. Then replace it with the exact type.

Car Key Battery Type by Vehicle Make

We compiled a list of cars with the type of battery they take. This is not an all-inclusive list; they are the ones we get the most questions on.

Honda Key Fob Battery

  • 2022 Honda Insight – CR2032
  • 2021 Honda Accord Hybrid – CR2032
  • 2021 Honda Accord Sedan – CR2032
  • 2021 Honda CR-V – CR2032
  • (16-21) Honda Civic Smart Key – CR2032

(17-21) Honda Civic RHK (remote head key) – CR1620

Nissan Key Fob Battery

The following Nissan fob takes CR2032

2022 Nissan Altima

  • Altima (19-22)
  • Sentra (20-22)
  • Versa Note (20)
  • Versa Sedan (20-22)

2022 Nissan Murano

  • Frontier (20-21)
  • Murano (19-22)
  • Pathfinder (19-21)
  • Titan (19-21)

2021-2022 Nissan Sentra

2022 Nissan Versa Sedan

2021-2022 Nissan Pathfinder

Toyota Key Fob Battery

The following Toyota keys take CR2032 battery

  • 2021-2022 Toyota 4Runner
  • 2021-2022 Toyota Avalon
  • 2021 Toyota C-HR
  • 2021-2022 Toyota Camry
  • 2021-2022 Toyota Corolla
  • 2021-2022 Toyota Highlander
  • 2021 Toyota Prius
  • 2021 Toyota Prius Prime
  • 2021 Toyota RAV4
  • 2021-2022 Toyota Sequoia
  • 2021-2022 Toyota Tacoma (Smart Key)
  • 2021 Toyota Tundra (Smart Key)

The following Toyota RHK (remote head key) take CR2016

  • 2021 Toyota Tacoma (RHK)
  • 2021 Toyota Tundra (RHK)

The two Toyota’s listed below take CR2450 Battery

  • 2022 Toyota Sienna
  • 2021 Toyota Venza

Mazda Key Fob Battery

The following Mazda key fobs take the CR2032 battery

  • 2021 Mazda 3
  • 2021 Mazda 6
  • 2021 Mazda CX-3
  • 2021 Mazda CX-30
  • 2021 Mazda CX-5
  • 2021 Mazda CX-9
  • 2021 Mazda MX-5 Miata

Jeep Key Fob Battery

The following Jeep fobs take CR2450 battery

  • 2022 Jeep Grand Wagoneer
  • 2022 Jeep Wagoneer
  • 2021 Jeep Wrangler

The following Jeep keys take CR2032 battery

  • 2021 Jeep Cherokee
  • 2021 Jeep Compass
  • 2021 Jeep Grand Cherokee
  • 2021 Jeep Renegade

Subaru Key Fob Battery

The following Subaru takes CR1620 Batteries

  • 2021-2022 Subaru Impreza (RHK)- 1620
  • 2021 Subaru Forester (RHK) – 1620

The following Subaru takes CR2032 Batteries

  • 2021 Subaru Impreza (smart key) – 2032
  • 2021-2022 Subaru Legacy – 2032
  • 2021-2022 Subaru Outback
  • 2021 Subaru Forester (smart key)

In summary, your remote battery does last for a few years but will need replacement. CR2032 and CR2025 are the most popular coin battery that most key use; however, it does not mean it fits every key.

Key fob battery replacement is an easy and quick task. You can replace it on your own; but if you prefer a professional to handle it, you can always call us. If you still have questions, you can ask them in the comment or call us for a faster response.