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i have read lots of horror stories about having to get the dammed thing re-programmed, but all i really want to do is change the battery, is it as easy as i hope it is, meanwhile my spare key fob is working fine.

so how do i take the dammed thing apart to put the new battery in please ?.

i have a new battery, had it for ages, it has the number 2032 on the packet and i reckon it is the same battery that is found in a lot of (if not all) PC's for keeping the BIOS settings etc.

tim
 

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isn't the thing that gets re-programmed the car's engine electronics, not the fob?

The 2032 batteries are fairly standard nowadays.

The Mk2 fob has a round thing on the back which I imagine screws off.

I imagine that the others are prised off.

Just wait for a guru to pass by...
 

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it should'nt be difficult as all batteries will eventually fail ...i done mine with no problems (although i have a diff one to you)...look in your handbook the instructions are there.....
 

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isn't the thing that gets re-programmed the car's engine electronics, not the fob?

The 2032 batteries are fairly standard nowadays.

The Mk2 fob has a round thing on the back which I imagine screws off.

I imagine that the others are prised off.

Just wait for a guru to pass by...
Fairly straightforward.

1) Take back off fob and remove dead battery.
2) Press any button for about 5 seconds to discharge capacitor
3) insert new battery
4) unlock car with key
5) press lock on fob until car locks. ( re-synchs the rolling code )

Bingo !

Should now be back to normal
 

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Fairly straightforward.

1) Take back off fob and remove dead battery.
2) Press any button for about 5 seconds to discharge capacitor
3) insert new battery
4) unlock car with key
5) press lock on fob until car locks. ( re-synchs the rolling code )

Bingo !

Should now be back to normal
top tip Mr. Guru from Parrot World. :URGOD:

(NB Desford is known as a centre for parrots. http://www.tropicalbirdland.co.uk/FREE-FLYING-BIRDS )

PS Yo! nice to meet you!
 

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mg_zs
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Sorry to ressurrect this thread, but I have just tried the procedure and got nowhere :(

Have opened fob, pressed all the buttons for 5 secs, replaced battery, replaced cover, opened car with key, then press lock several times. After about 10-15 secs the alarm then just goes off. Then have to use the spare fob to stop annoying the neighbours!

Anyone got any ideas - surely the fob cant just lose the synch with my car, can it?
 

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rover_400_95_99
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Check that th battery contacts haven't broken away from the circuit board (common) and that the baat is the right way up and a good un!
 

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rover_25
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Key fobs and washing machines just don't mix

In a bit of a rush, put the denims with my car keys in the machine...realised what I'd done about 10 minutes later.

Stopped the machine, retrieved the fob and guess what ? It didn't work any more.

Took it apart...dried the fob and battery on a low heat..and then came the acid test.
Followed the advice on here ...unlocked the door on the key and after 4 presses of the 'lock' button hey presto I was back in business again.

Getting a spare fob tomorrow....thanks for the advice fellers !

Bill
 

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Just did this a minute ago and it worked. Happy Days :rocker:

1) Take back off fob and remove dead battery.
2) Press any button for about 5 seconds to discharge capacitor
3) insert new battery
4) Put fob together again
4) Press lock on fob until car locks. ( re-synchs the rolling code )
5) Opened car
6) Locked car

SUCCESS :clap:
 

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my version:

# realise fob battery is almost dead, so unlock car manually
# turn key - got beeped at, with no starting.
# pull apart keyfob, battery on tongue - yup, dead
# Strip apart torch kept in car, to get to the 2xAA batteries
# hold one battery terminal to the outer casing, and bridge 2nd battery with random coin found on floor
# jump with joy the damned thing works
# drive to tesco, to buy new batteries
# keep spare in car, at all times :lol:
 

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rover_45
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my version:

# realise fob battery is almost dead, so unlock car manually
# turn key - got beeped at, with no starting.
# pull apart keyfob, battery on tongue - yup, dead
# Strip apart torch kept in car, to get to the 2xAA batteries
# hold one battery terminal to the outer casing, and bridge 2nd battery with random coin found on floor
# jump with joy the damned thing works
# drive to tesco, to buy new batteries
# keep spare in car, at all times :lol:
Ha ha, love it! Especially the bit about the torch batteries!! Bodge? Never!!! :)

On a semi-sensible note, can I urge that people use decent CR2032 batteries? I change the batts in both my remotes every year as a matter of course. The missus had bought a random pack of mixed button cells from some goddam bargain shop, so I bunged a couple of these in this year. Lasted literally a month in my main remote! So I'm back on Duracells now. Sure, you pay more, but it's worth it IMO.
 

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mg_zr
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I have just changed my fob case and done all of the above to no avail :( will my fob need re-programming?
Any advice please folk..
Cheers
Lew
 

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mg_zr
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Sorted it now,was a crappy contact on the battery
dare i attempt to solder on a new micro switch..has anyone done this??
 

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mg_zs
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It worked!

Apologies for bringing up an older thread, but this was the first on the Google search for changing the key fob battery on an MG ZS 180.

Just thought I would add to petehelfs' and XPart02's highly appreciated steps, which worked brilliantly - this is what I did without any issues.

  1. Take the back off of the fob and remove the battery
  2. Press any button on the fob for 5-10 seconds
  3. Insert a new battery (DL2032(same as CR2032, it's just Duracell's own branding))
  4. Put the fob back together
  5. Manually unlock the car with the key
  6. Repeatedly press the lock button on the fob until the car locks.
  7. Test it locks/unlocks the car a few times....
N.B. Step 6, press the lock button 4 or 5+ times until it locks. On another forum it stated to hold the lock button down for 5-10 seconds, but I remembered somewhere else that you're supposed to press it repeatedly.
 

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Changing the fob battery is on the annual service schedule.

Personally I unlock the car before I start on the battery.
I don't discharge the fob.
I do lock and unlock several times until car and fob sync.
 

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rover_25
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Hi everyone,

I have a similar problem with my 2004 Rover 25. I lost the original key and fob and my spare key just won't work. I changed the battery but it still doesnt want to unlock or lock the car. I have the EPA code to disable the alarm but my door lock is broken so I can't enter the code. Is there anything I can do from home?

Thanks in advance!
 
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