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I have two transponder keys for my Honda, and have barely used the 2nd one. Picked it up the other day to use it in the car and it didn't work, the 'battery' seems dead. I don't want to ask my dealer because they always try to sell something and I don't trust them. If I take the car for an oil change for crying out loud, they tell me I need $300 of work on the car with their 28 point checkup. Bogus. So I'm wondering if there is a battery that can be changed? The price of a new one is over $200. Not going there. Thank you guys.
Transponder keys are 'chipped' typically. They have a computer chip that is mated to the theft deterrent system. The programming instructions are in the owners manual.
Batteries are typically in the remote key fob clicker that locks and unlocks the car. The batteries can be found at any watch counter like CVS or WalMart.
I have two transponder keys for my Honda, and have barely used the 2nd one. Picked it up the other day to use it in the car and it didn't work, the 'battery' seems dead. I don't want to ask my dealer because they always try to sell something and I don't trust them. If I take the car for an oil change for crying out loud, they tell me I need $300 of work on the car with their 28 point checkup. Bogus. So I'm wondering if there is a battery that can be changed? The price of a new one is over $200. Not going there. Thank you guys.
Are you talking about the key itself - as in, a key that is computer-programmed to a particular car? One like this?
Or are you talking about a key that locks & unlocks doors - such as this one?
If it's the latter, it will simply have a small battery in it. The battery is typically about the size of a dime.
Many transponder keys don't have batteries at all.
They are powered by the RF emissions of the key-checker in or near the steering wheel.
The microchip inside the key, needs such a tiny amount of power, that just the low-power radio signal the car beams out to the key, is sufficient to power the key's microchip for a few hundreths of a seconds. That's enough to query it for its secret ID number and compare its response to the number the car is programmed with.
The typical Honda keyfob has a lithium 2016 battery in them. I replaced one recently on one of the keys for my Honda Pilot. Amazon sells two of them for $1.87. To replace them in a Honda keyfob you need a small Phillips screwdriver and either good fingernails or another small screwdriver to pry the case open. Pop the two halves apart of the internal part, then replace the battery. Reassemble and it should be good to go for another 3-4 years.
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Thank you guys.
