Changing a micra k12 battery

[Nads02]

My aunt's micra ain't feeling too good. Jump started it and it turned over. However after leaving it for about 30 minutes idling under its own steam and trying to start it later wouldn't start. I'm guessing the battery has seen better days. Will change the battery soon but I heard it has a radio code? Is this true and what do you use to change the battery without resetting the radio? I don't know the radio code and not willing to pay for it. Planning to get something like this below.

https://www.amazon.co.uk/dp/B008H14SH0/ref=cm_sw_r...

Im a little inexperienced but I gotta start somewhere!

[Hammer67]

I don`t recommend it but you "could" change the battery with the engine running.

[Scrump]

All that thing does is connect a car battery into the cigarette lighter socket. You could just use jump leads to achieve the same, but the cigarette socket is easier.

If you don’t have the radio code then you ideally need another battery (which could be in another car). Connect this to the micra using jump leads (I have made up some thin leads using small crocodile clips for this purpose). Connect the negative to the micra chassis and the positive to the positive lead, make sure it stays attached while you change the battery.
If you buy the doodah and connect via the cigarette socket then make sure the ignition is left on so the socket is live.

[Chris32345]

Scrump said:

All that thing does is connect a car battery into the cigarette lighter socket. You could just use jump leads to achieve the same, but the cigarette socket is easier.

If you don’t have the radio code then you ideally need another battery (which could be in another car). Connect this to the micra using jump leads (I have made up some thin leads using small crocodile clips for this purpose). Connect the negative to the micra chassis and the positive to the positive lead, make sure it stays attached while you change the battery.
If you buy the doodah and connect via the cigarette socket then make sure the ignition is left on so the socket is live.

I wouldn't advise leaving the key in especially with it in the ignition while disconecing a battery this can cause issiuesy


Especially on a Honda ( I thinks it's honda) as this can wipe the imboliser codes from the key or body computer

[Scrump]

If he doesn’t keep the key in then the cigarette socket will not be live and the doodah he linked to will not work.

Porsche actually recommend the ignition is left on when changing the battery on my 911 in order to prevent the alarm activating.

[Nads02]

Might buy the doodah and give it a go. Got a spare battery from my brothers (scrapped) honda jazz.

[Nads02]

Changed it today with the engine running. Battery was disconnected briefly, done all the prep work (removing battery clamp and vaseline on new battery terminals) first so the terminals were only disconnected for 1 minute.

[Baldchap]

If ever you need a code there are loads of free generators online that work.

[anonymous-user]

OP if she bought the car new it will have the codes in the manual/paperwork. Or even if used and she still has the radio booklet.

[Nads02]

Super_G said:

OP if she bought the car new it will have the codes in the manual/paperwork. Or even if used and she still has the radio booklet.

Nope just had service history which I found under the passenger seat. Had full service history but I don't think she even knew...

[anonymous-user]

OP try 2032 or 0032.
You have 10 attempts before it locks.
If neither of those work you can buy a code online by inputting your serial number. A squid on flee bay.

[Nads02]

Super_G said:

OP try 2032 or 0032.
You have 10 attempts before it locks.
If neither of those work you can buy a code online by inputting your serial number. A squid on flee bay.

Thanks for that but I didn't need the radio code. Changed the battery real quick with the engine running. To double check I turned the car on and off once and tuned into LBC, it was playing so I'm assuming the radio is fine