Key Battery Trouble
Key Battery Trouble
Author
Discussion

A55

Original Poster:

166 posts

87 months

Tuesday 27th June 2023
quotequote all
Bought a second hand car last year, came with two keys, one original one cloned. The clone key had a flat battery so I bought some Panasonic ones and replaced it, about three months later when I came to use it the battery was dead, I replaced it and once again a few months later it was dead. I guess it must be a faulty key, but what could be wrong with it? I am curious.

595Heaven

3,386 posts

108 months

Tuesday 27th June 2023
quotequote all
Button stuck down?

If a non-OEM one maybe it is just a poor electrical design or is more powerful than normally allowed. Does it work over a longer range than the OEM one?

Sheepshanks

41,067 posts

149 months

Tuesday 27th June 2023
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What’s a cloned key - like a Chinese copy?

Could just be iffy batteries - which battery number is it? Keyless VAG cars are very sensitive to battery type, read of people buying packs of batteries and only some work as the key takes more than the batteries rated current if a button is pressed.

After one was dealer changed at service it lasted a month.

Having said that, there a good chance the cloned key has more iffy components than a genuine one.

TwinKam

3,570 posts

125 months

Tuesday 27th June 2023
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You need to test the signal emitted, obviously there should be none when no button is being depressed. Testers are available for circa £30 eg Sealey, or ask your local garage if they have one to test it for you.
A 'cloned key' refers to the software, it's a key that has been electronically cloned from an existing key rather than from the master key, it's nothing to do with the hardware of the key itself.

Edited for clarity.

Edited by TwinKam on Tuesday 27th June 16:20