Mazda CX-5 Key Fob Battery: Deluxe CR2032 3V
A Mazda CX-5 key runs on a single coin battery, though which type you need varies by key: CR2025 or CR2032. For the 2025 and 2026 CX-5, the manuals specify a CR2032. Two single-use lithium coin cells are included in the Deluxe CR2032 3V pack.
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Will This Battery Fit Your CX-5 Key?
Only if your key needs a CR2032. Mazda’s 2017 and 2019 manuals and the 2020 Type A key list a CR2025. The 2020 Type B key and the 2023, 2025 and 2026 manuals list a CR2032. Run this quick check before you buy.
The listing names many Mazda models and a wide range of years. Treat that as a starting point only. Your own owner’s manual and the battery code printed on the old cell decide the right type. A CR2025 is thinner (about 2.5 mm) than a CR2032 (about 3.2 mm), and Mazda lists a separate cell for each key.
Deluxe CR2032 3V Specifications
| Property | Detail |
|---|---|
| Brand / model | Deluxe Batteries CR2032 3V, as shown on the product listing |
| Pack size | 2 batteries (one is used per key swap) |
| Battery type | CR2032 coin cell (IEC CR2032, ANSI/NEDA 5004LC) |
| Chemistry | Lithium / manganese dioxide (Li/MnO₂) for standard CR2032 cells; single-use |
| Nominal voltage | 3 V |
| Dimensions (standard CR2032) | 20 mm diameter × 3.2 mm thick |
| Install direction in Mazda keys | Positive (+) side up |
| Key fob included | No, batteries only |
| Capacity (reference only) | Panasonic CR2032: 225 mAh. Energizer CR2032: typical 235 mAh. Not a Deluxe rating. |
| Deluxe capacity, weight, shelf life | Not published in the sources checked |
| Bitter coating / child-resistant pack | Not confirmed for this pack |
| Rechargeable | No |
| Mazda battery life guidance | About 1 year (Mazda CX-5 owner’s manual, earlier edition) |
Size, chemistry and voltage describe the standard CR2032 type. Capacity figures come from Panasonic and Energizer datasheets and are shown for context only. Values for the Deluxe cell itself were not found.
CX-5 Key Battery Replacement Difficulty
This is a low-effort job for most owners, with a small risk of damaging the key. You open two covers and a cap, and swap one coin cell. Mazda gives owner steps but recommends a dealer to avoid damage. Its steps have no programming stage. Tap a slice to highlight it.
- 30% Opening the covers without damage
- 20% Handling the cap and cell
- 35% Choosing the correct battery
- 15% Checking the result
The difficulty score and effort split are an editorial estimate based on Mazda’s published steps, not an official rating.
How to Replace Your CX-5 Key Battery
These steps follow Mazda’s CR2032 key procedure. Tap each step to tick it off as you go, and use the pictures in your owner’s manual for the exact release points.
- 1Get your tools readyYou need one new CR2032 and a flat-bladed screwdriver with tape wrapped round the tip. The tape protects the key from marks.
- 2Remove the lower coverSlide or press the release knob as shown in your manual, then take off the lower cover.
- 3Release the upper coverPress the tab to unlock the upper cover. Slide the taped screwdriver into the gap as shown, then twist gently to lift the cover off.
- 4Remove the cap and old batteryLift off the battery cap with the taped screwdriver, then take out the old cell. Do not touch the circuit board or bend the terminals.
- 5Insert the new CR2032Place one new battery positive (+) side up. Keep dirt out of the key.
- 6Refit the cap and coversPut the battery cap back, then the upper cover. Insert the lower cover tabs into the slots and fit the lower cover.
Check the cell is a CR2032, sits positive side up and is fully seated. Then check whether the key’s power saving function is on, because it switches off keyless entry and push-button start functions. If the problem stays, see a Mazda dealer.
A key that needs a CR2025 opens differently. You pull out the spare mechanical key first, and there is a rubber ring under the cap that must not be scratched or left out. Use a CR2025 there, not this pack.
Other Devices That Use a CR2032
The CR2032 is a common coin cell, not a Mazda-only part. Always confirm the battery type in your device manual first.
- CX-5 (2023–2026)CR2032 per owner’s manual
- CX-5 (2020 Type B key)CR2032 per owner’s manual
- Older CX-5 keysCR2025, not this pack
- Other Mazda modelsListing names several; check manual
- CalculatorsCheck your device manual
- Digital scalesCheck your device manual
- Small remote controlsCheck your device manual
- Memory backupCircuits that specify CR2032
- Medical devicesOnly if the manual lists CR2032
- Apple AirTagNeeds a CR2032; check coating
- Security price tagsListed by Panasonic
- Smart transmitter tagsListed by Panasonic
Safety, Storage & Disposal
A swallowed lithium coin battery can cause serious burns in as little as two hours. Used cells are still dangerous. Get emergency medical help immediately if you suspect a child has swallowed or inserted one.
- Never recharge, crush, open or burn it.
- Use the type your key specifies, with the positive side up.
- Keep new and used cells out of reach of children.
- Tape the terminals of the old cell, then take it to a battery collection point. Do not put it in household rubbish or recycling bins.
Mazda CX-5 Key Fob Battery: FAQ
What battery does a Mazda CX-5 key fob use?
It depends on the key. Mazda’s 2017 and 2019 manuals and the 2020 Type A key call for a CR2025. The 2020 Type B key and the 2023, 2025 and 2026 manuals call for a CR2032. Check your owner’s manual or the old battery before you buy.
Does the Deluxe CR2032 fit every CX-5?
No. It only fits a key that needs a CR2032. A key that needs a CR2025 uses a thinner cell, and Mazda lists a separate battery for each key type.
How many batteries does the key take?
One. Mazda’s steps remove and replace a single coin cell. The pack holds two, which leaves the second one as a spare.
Which way does the battery go?
Positive (+) side up, in every Mazda key procedure covered here.
Is the Deluxe CR2032 rechargeable?
No. It is a single-use cell and must never be recharged. Some online listings show “Lithium Ion” in the composition field, but a standard CR2032 is a single-use lithium/manganese dioxide cell.
How long does a CX-5 key battery last?
An earlier edition of Mazda’s CX-5 manual gives about one year and recommends replacing it roughly once a year. That is Mazda’s guidance for the key, not a tested figure for the Deluxe brand.
Do I need to reprogram the key after the swap?
Mazda’s battery steps contain no programming stage. If the key still fails, check the battery type, the positive-up direction and the cover fit, then ask a Mazda dealer.
Why does my key not work after a new battery?
Check that the cell is a CR2032 (or CR2025 for older keys), sits positive side up and is fully seated. Also check whether the key’s power saving function is on. Mazda says it turns off keyless entry and push-button start functions to save battery.
Can I start the CX-5 if the key battery is dead?
Mazda’s 2026 CX-5 manual has a backup method: press the brake pedal, wait for the green light on the start button to flash, line up the centre of the key emblem with the centre of the start button, then press the button once the green light turns on. Follow your own model’s manual.
Can I use the Deluxe CR2032 in an AirTag?
An AirTag takes a CR2032, but Apple warns that some bitter-coated cells may not work and tells owners to look for AirTag compatibility on the pack. This pack does not state that. Use a pack that does.
How should I dispose of a used CR2032?
Do not put it in household rubbish or recycling bins. Tape the terminals and take it to a battery collection point or a household hazardous waste service. Keep used cells away from children.
