1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Battery disconnection

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by joinerman, Jan 4, 2014.

  1. joinerman

    joinerman Well-Known Member

    Joined:
    Jun 30, 2013
    Messages:
    5,921
    Likes Received:
    121
    If i disconnect the battery on my 05 3.0 tdi quattro to clear out the scuttle of leaves & debri will the radio need the code put back in & will the key fobs keep their programing/synchronicity ?
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. ajax1976

    ajax1976 Well-Known Member

    Joined:
    Oct 23, 2012
    Messages:
    1,047
    Likes Received:
    512
    I recently changed batteries after the car had sat for a few days with a dead battery. The radio didn't need the code back in but the key fob wouldn't work. Once I'd used the key to start the car then lock the car by using the key in the lock it started working remotely again.
     
  4. ruairi83

    ruairi83 Well-Known Member

    Joined:
    Dec 28, 2007
    Messages:
    1,196
    Likes Received:
    270
    I did the same and had it off for 30mins. Same with keys but I had to resync key with vcds as it wouldn't open doors. I started getting a few different lights on dash that cleared after some driving and clearing with vcds
     
  5. NHN

    NHN Retrofitter - Audi - VW - Skoda - Seat
    Site Sponsor Gold Supporter VCDS Map User

    Joined:
    Jan 14, 2008
    Messages:
    28,168
    Likes Received:
    1,431
    Radio remembers last vin connected to, so you'll be fine.
     
  6. joinerman

    joinerman Well-Known Member

    Joined:
    Jun 30, 2013
    Messages:
    5,921
    Likes Received:
    121
    Thanks for the info, job done today, battery out, bungs out, clean out all the s**t, new pollen filter, fit new cover & battery cover, keys needed programing again.
     
  7. NHN

    NHN Retrofitter - Audi - VW - Skoda - Seat
    Site Sponsor Gold Supporter VCDS Map User

    Joined:
    Jan 14, 2008
    Messages:
    28,168
    Likes Received:
    1,431
    That's very strange, I've disconnected batteries for hours, even days & the remotes always worked without resync.
     
  8. dpaz

    dpaz Active Member

    Joined:
    Oct 28, 2011
    Messages:
    429
    Likes Received:
    73
    Had my battery disconnected for a good 48hrs and needed to resync.
     
  9. Vorshprungdork

    Vorshprungdork Active Member

    Joined:
    Feb 20, 2004
    Messages:
    456
    Likes Received:
    39
    Just when I read this, my Wife's TDI S-Line (170) 2007 has some VCDS codes to do with the radio, it works fine but I was thinking maybe the previous owner had changed it and never coded it properly. The car did get another battery just after we got it, could it be due to that and how can I rectify the coding, I have an up to date Vag-Com but not very good with it. Sorry, don't mean to hyjack the thread.
     
  10. rowdyboy

    rowdyboy Member

    Joined:
    Mar 2, 2009
    Messages:
    803
    Likes Received:
    18
    The only thing I had to do was reprogram the windows. It's all in the handbook, 2 min job and no VCDS needed. Mine was dead for 3 days. The sat nav was fine.
     
  11. scotty76

    scotty76 Well-Known Member
    Audi S4

    Joined:
    Nov 9, 2011
    Messages:
    1,861
    Likes Received:
    656
    I had a new battery on Monday. Radio was fine but did need to do the key fob thing. I went for unlock, used key to turn ignition on, turn ignition off again and lock car using fob. Worked fine.
     
  12. dpaz

    dpaz Active Member

    Joined:
    Oct 28, 2011
    Messages:
    429
    Likes Received:
    73
    Scotty76 what battery did you get? Looking at replacing mine in a month or two myself.
     
  13. scotty76

    scotty76 Well-Known Member
    Audi S4

    Joined:
    Nov 9, 2011
    Messages:
    1,861
    Likes Received:
    656
    My local Audi indie ordered it from TPS and fitted it for me. When it turned up it was an Exide Excell.

    BTW Euro Car Parts have 15% of all batteries at the moment.

    What I can say is I thought my car was starting fine, maybe a little slow but not "old car, crank it for 30 seconds slow". But I was wrong. It's much faster and more eager to start now. :)
     
  14. scotty76

    scotty76 Well-Known Member
    Audi S4

    Joined:
    Nov 9, 2011
    Messages:
    1,861
    Likes Received:
    656
    I'm now fully expecting a massive battery discussion/that battery is sh*t discussion but I don't really care. It's guaranteed and by the time the guarantee runs out chances are I won't have the car anymore.
     
  15. lynallbel

    lynallbel Active Member

    Joined:
    Oct 9, 2013
    Messages:
    395
    Likes Received:
    36
    I think nowadays unless you buy an unbranded battery, its probably quite hard to get a **** one.
     
    scotty76 likes this.
  16. rowdyboy

    rowdyboy Member

    Joined:
    Mar 2, 2009
    Messages:
    803
    Likes Received:
    18
    I recently got a Bosch Silverline from Halfords, with a trade card it's was a good deal.
     
  17. lynallbel

    lynallbel Active Member

    Joined:
    Oct 9, 2013
    Messages:
    395
    Likes Received:
    36
    Other thing to bear in mind is the batteries warranty, some are proper if it fails you get a new one, others are pro rata, ie 4 yr warranty, so if it fails at 3 years, they then give you 25 percent of a replacement unit as you've had 75 percent of its life.
    But like you rightly say people dont tend to keep cars for that long now.
     
  18. Vorshprungdork

    Vorshprungdork Active Member

    Joined:
    Feb 20, 2004
    Messages:
    456
    Likes Received:
    39
    I have a Halfords trade cars as well and bought about 3 calcium batteries over the last few years, they come with a longer 4 year warranty and I had to get one exchanged, which was surprisingly easy, at about 2 years old just took it in and got a new one. The rest have been fine. Prior to that I bought a Varta for my Golf, which I kept when I sold it, battery ws about 3 years old and just out of warranty. I wondered if it was really worthwhile keeping it but a few months later my Wife's A3 battery packed up and the Varta's in there and fine 2 years later.
     

Share This Page