Battery for Lexus RX350 Key Fob: Deluxe CR2032 3V
A single CR2032 3V lithium coin battery powers the key fobs on most Lexus RX350 models from 2016 onward. The Deluxe CR2032 3V two-pack covers RX350 smart keys made between 2016 and 2024. Keys for older RX350 vehicles use different cells.
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Will This Battery Fit Your RX350 Key?
The right RX350 key battery depends on the model year. The Deluxe pack is listed for 2016 to 2024 RX350 smart keys and excludes the buttonless card-style key. Run this quick check before you buy.
Lexus’s U.S. battery chart lists CR2016 for 2007 to 2009 RX350 keys, CR1632 for 2010 to 2015, and CR2032 for 2016 to 2019. For 2020 and newer models, confirm the size in your owner’s manual or on the old battery before you install anything.
Deluxe CR2032 3V Specifications
| Property | Detail |
|---|---|
| Brand / model | Deluxe Batteries, CR2032 key fob replacement batteries for Lexus |
| Battery type | CR2032 lithium coin cell, single use |
| Pack contents | 2 batteries (key fob not included) |
| Rechargeable | No |
| Nominal voltage | 3 V |
| Listed capacity | 225 mAh |
| Dimensions (standard CR2032 format) | Approx. 20 mm diameter × 3.2 mm thick |
| Listed RX350 fit | 2016 to 2024 smart-key fobs |
| Not compatible | Buttonless, credit-card-shaped Lexus key |
| Programming after swap | None required, per the listing |
| Typical Lexus key battery life | 1 to 2 years (Lexus guidance, not a Deluxe rating) |
| Not published for this product | Weight per cell, temperature range, discharge rates, shelf life |
Capacity is the figure shown on the product listing and has not been independently tested. Dimensions describe the standard CR2032 format.
RX350 Key Fob Battery Replacement Difficulty
This is an easy job at 2 out of 10. It needs a small flathead screwdriver and no programming step. Allow about 5 to 10 minutes on a first try. The main risks are buying the wrong battery code and scratching the case. Tap a slice to highlight it.
- 30% Opening the fob case
- 15% Handling the module & terminals
- 40% Choosing the right battery
- 15% Testing the fob
The score, time and effort split are an editorial estimate based on the documented replacement process, not an official Lexus rating. Cracked cases, damaged battery holders or a fob that still fails with a correct fresh cell are good reasons to see a dealer or locksmith.
How to Replace Your RX350 Key Fob Battery
You need a fresh CR2032, a small flathead screwdriver and some tape. Tap each step to tick it off as you go.
- 1Remove the mechanical keyOperate the release latch on the fob and pull the metal key out.
- 2Open the fob coverWrap the screwdriver tip with tape to protect the case. Insert it at the opening slot and twist gently to separate the cover.
- 3Expose the batteryIf the electronic module hides the battery, lift it out carefully. Do not bend the terminals.
- 4Swap the batteryLift out the old cell and confirm it reads CR2032. Insert the new one with the positive (+) side facing up. Keep the old cell away from children.
- 5Close the fobRefit the module, press the cover halves together firmly and slide the mechanical key back in.
- 6Test the fobPress lock and unlock, then check smart entry and push-button start.
Check that the cell reads CR2032, sits flat with the positive side up, and that no terminal is bent. Try another fresh cell if needed. A weak 12V car battery or radio interference can also cause entry problems.
Other Devices That Use a CR2032
The CR2032 is a common coin cell found in many small electronics. Only use it where your device manual lists this size.
- Car key fobsRemote & keyless entry
- Smart tagsAirTag: check coating
- Garage door remotesCheck your manual
- Digital scalesBathroom & kitchen
- CalculatorsPocket & desktop
- Remote controlsCompact remotes
- Flameless candlesLED tea lights
- Toys & gamesCheck your manual
- WatchesSelected models
- Glucose monitorsCheck your manual
- Heart-rate monitorsSelected models
- Security tagsElectronic price & security tags
These are common CR2032 uses. Device-specific approval for the Deluxe pack was not found. Follow your device manual. AirTag users should read Apple’s guidance on bitterant-coated CR2032 cells.
Safety, Storage & Disposal
A swallowed lithium coin battery can cause severe chemical burns in as little as two hours. Keep new and used cells away from children. Get emergency medical help immediately if you suspect ingestion.
- Never recharge, crush, open, short-circuit or burn it.
- Use the exact code your key needs. Do not swap in a rechargeable LIR2032.
- Keep used cells out of household trash and recycling bins.
- Tape the terminals or bag each cell, then use a battery collection point.
RX350 Key Fob Battery: FAQ
What battery does a Lexus RX350 key fob use?
It depends on the model year. Lexus’s U.S. chart lists CR2016 for 2007 to 2009, CR1632 for 2010 to 2015 and CR2032 for 2016 to 2019. Check your owner’s manual for newer years.
How many batteries go in the key fob?
One. The Deluxe pack contains two CR2032 cells, which gives you a spare for the next replacement.
How long does a Lexus key fob battery last?
Lexus gives a standard electronic key battery life of 1 to 2 years. The battery can run down even when the key is not used often. This is general guidance, not a Deluxe-specific guarantee.
Do I need to reprogram the key after changing the battery?
The listing states no programming is required, and the documented battery replacement procedure has no programming step. Replacing a whole key is a different job.
Is the Deluxe CR2032 rechargeable?
No. It is a single-use lithium coin cell and must never be recharged.
Can I use a CR2025, CR2016, CR1632 or LIR2032 instead?
No. Use the exact battery code your key requires. Similar size or 3V rating does not mean the cell is a correct substitute, and LIR2032 is a rechargeable 3.6V to 3.7V type.
How should I dispose of a used CR2032?
Do not put it in household trash or recycling bins. Tape the terminals or bag each cell individually and take it to a battery collection or hazardous-waste service. Keep used cells away from children.
