Has anyone with an MK3 fabia installed a new battery? If so, is it plug and play as per usual? I've read online regarding AGM batteries and the stop to start technology. 

 

My old battery has a BEM code. Would a new battery needing inputting or coding to the car? 

 

I've came across this all online and it's confused the heck out of me.

 

Anyone with experience of replacing the battery on an MK3 1.4 tdi Fabia?

 

Thanks.

Yes I have (on 1.2 TSI), that's what got me to this site.

 

BTW adding "MK3 1.4 tdi" to your model info would help with giving answers, a diesel, like an automatic, is even more reliant on a good battery.

 

I can direct you to my thread or you can take my memory of it now.

 

Yes the battery is best coded to the car so that the very invasive battery stop/start programs can allow for its charging but some suggest that the car will learn you've fitted a new battery (but probably won't know you've changed the type).

 

Don't panic fit the new battery as this at least gives you a chance to charge up your previous battery off the car and at a long low slow rate.  What you can do if you want until the new battery is coded and type and any changes coded is to disconnect the stop/start connection on the earth (negative post connections) farty little awkward plastic clip connector, you'll get a warning on the dash but life will go on (but not your stop/start function).  I can photo the connection for you if you can't see it.

 

If you have a look on here there's a thread for a map for those who might recode the battery for you, and scan for error codes too, if you can't find it I'll look, just can't remember at the moment.

 

Edited 11 October, 20214 yr by nta16

I found these photo on site.

 

Note, take care removing this fiddly connector only use your fingers not tools, getting that grey locking tab back is the awkward bit, especially if like me you have short stubby fingers, it's plastic so use guile not too much force.  Toothbrush cleaning any grit/crud off first might help, once the grey clip is released you can wiggle the connector off.  Best to tape or cover both open ends of the connectors to stop any muck getting in.

 

I think I had the AGM battery fitted for days before it was coded and disconnected that stop/start connection for at least one day if not more, no problems that I could tell and I fully charged the AGM battery before I fitted it against the advice of some.  After the car runs, the stop/start works and the battery charges I very much doubt anything I done has made any significant difference, if any at all, to the life of the new battery.

 

HTH.

 

FYI - this is the report from scan tool of swapping the battery, I was told the battery although a Moll from the Skoda factory might be coded as a JCB and Serial Number of  1111111111, the same as so many others from the factory, so much for accuracy.

 

I was also told to enter the AGM as "Fleece" but I wasn't 100% by this but still haven't got replenished stock of can-be-arsed to check or do anymore about it yet and I'm not sure it'd make much odds, same as 1 more A/hr battery capacity but I do think the change from EFB to AGM is worth entering if you're recoding.  Whether the car would learn for itself that the battery has improved (is new) I don't know but I don't think it'd realise the difference in type (but it might, who really knows with VAG computer programs - other than the companies in China).

 

Name: Battery_Adaption
      

  Values:
           Battery_capacity:
                Old value: 59
                New value: 60
            
            Battery_manufacturer:
                Old value: JCB
                New value: BOSCH
            
            Battery_serial_number:
                Old value: 1111111111
                New value: 1111111112
            
            Battery_technology:
                Old value: EFB
                New value: Fleece
    

Mileage: 38907 mi
    Date: 2021-06-25 10:30:01

 

Cheers.

17 hours ago, CReese123 said:

Has anyone with an MK3 fabia installed a new battery? If so, is it plug and play as per usual? I've read online regarding AGM batteries and the stop to start technology. 

 

My old battery has a BEM code. Would a new battery needing inputting or coding to the car? 

 

I've came across this all online and it's confused the heck out of me.

 

Anyone with experience of replacing the battery on an MK3 1.4 tdi Fabia?

 

Thanks.

I had Halfords replace mine. They were fast and efficient (booked appointment online), had the battery ready when I arrived and had to recode when swapped over. Took around 15 mins. Of course, other Halfords may or may not be so on the ball as Chichester Halfords.