A battery change does not program anything. The cell usually fitted is a CR2032 or a CR2016, matching the stamp, and the key is a smart key, flip key, or remote-head key. People who searched toyota key fob programming after battery change still have one rule to follow. If a chart disagrees, the stamp on the old cell wins.
Read the stamp before a programming question
The coin already in the shell is the buying guide for a programming question.
CR1632 is reported for a programming question on some mid-generation smart keys, including certain Prius shells.
The CR2016 you might buy for a programming question is 20 mm across and 1.6 mm thick.
Every one of those coins, in the case of a programming question, is a 3-volt lithium cell.
A rechargeable LIR2032 does not belong in the shell for a programming question.
A mark molded into the plastic wins over habit during a programming question.
Right-hand drive does not change the coin you buy for a programming question.
Touching a dead smart key to the start button is a separate backup, not the shopping step in a programming question.
Close the cover fully before you test a programming question from outside the car.
A brochure can list two keys for one car, and a programming question still follows the shell you are holding.
If the shell in a programming question is a new undocumented shape, the pry method is not confirmed.
Lock and unlock once from outside. That confirms the coin. It does not pair a fob.
If the right coin is touching and the fob is still dead, the fob has failed.
Match the cell for a programming question
A push-button smart key from the 2010s onward usually takes a CR2032 when you are doing a programming question.
If two reliable notes disagree about a programming question, the page says they disagree.
The CR2025 you might buy for a programming question is 20 mm across and 2.5 mm thick.
Same voltage does not make the coins interchangeable for a programming question.
Almost every Toyota fob takes one cell, and a programming question is not a two-cell case.
A battery-only swap for a programming question does not require programming.
Base grades often kept a metal key after a higher grade moved on, which still matters for a programming question.
Keep the spare coin for a programming question in a cool drawer, not on a dashboard.
A gap at the cover, during a programming question, means the coin is too thick or a clip missed.
Japan, Australia, Europe, and the US can print different grade names around a programming question.
A bZ4X-style shell is not opened with an older Camry method during a programming question.
A never-paired extra fob is a dealer or licensed locksmith job. Stop there.
A failed fob is still a dealer or licensed locksmith job, not a procedure printed here.
Keep the wrong parts out of a programming question
An older remote-head key or flip key usually takes a CR2016 when you are doing a programming question.
CR1616 is uncommon for a programming question and is not the default older Toyota cell.
A CR1632 reported for a programming question is 16 mm across and 3.2 mm thick.
A CR2450 is the wrong coin for a programming question.
This site does not invent a two-battery fob for a programming question.
After a programming question, lock the car once from outside and then unlock it once.
Grade names used for a programming question belong to that market, not to a borrowed US list.
A pharmacy coin and a dealer coin are the same job for a programming question when the stamp matches.
Do not stack a second coin as a shortcut for a programming question.
The work of a programming question stays a cell swap on a hybrid.
If the stamped coin is seated and a programming question still fails, the fob has failed. Stop.
This page does not list pairing steps, codes, or ignition sequences.
Close the shell after a programming question
CR2025 appears for a programming question only on some older compact remotes.
The CR2032 you might buy for a programming question is 20 mm across and 3.2 mm thick.
A CR1616, uncommon for a programming question, is 16 mm across and 1.6 mm thick.
An A23 battery is the wrong shape for a programming question.
Plus, while you handle a programming question, is the flat branded face unless the shell mark disagrees.
A hybrid badge does not change the coin you buy for a programming question.
A never-paired extra fob is outside a programming question. A dealer or licensed locksmith does that work.
A date code on the blister for a programming question tells you the coin is fresh. It does not choose the size.
Do not slip foil under the coin as a shortcut for a programming question.
The work of a programming question stays a cell swap on a right-hand-drive car.
Write the stamp on the spare sleeve when you finish a programming question.
A fob that used to work, and fails only after a coin swap, needs the coin reseated.
Pages that sit beside a programming question
Continue with How to Replace a Toyota.
Continue with the write-up on What Battery Does a Toyota Key Fob Take.
Continue with notes for Toyota Key Fob Not Working After Battery Change.
Continue with Start a Toyota with a Dead Key Fob.
Continue with Toyota Polarity.
Questions answered only with the facts above
Does a new coin need programming?
No. A battery-only swap does not require programming.
What about a fob that was never paired?
A dealer or a licensed locksmith does that work. This page stops there.
What confirms the coin?
Lock and unlock once from outside the car.
Does the stamp still win for a programming question?
Yes. The stamp on the old cell wins over a chart or a photo of another year.