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Garage to code new VW battery

  • 16-01-2026 06:32PM
    #1
    Registered Users, Registered Users 2 Posts: 29


    Just wondering if anyone can recommend a garage around Dublin, preferably around the south of town, that could code a new VW battery.

    Bought the battery myself and the VW dealer is looking for a ridiculous amount to register it.

    Also had a look at VAG tools that can code but they're well over a hundred quid and the cheaper ones, like OBDEleven or Carista, require a subscription to do it.

    I don't mind paying to get it done but €130 just to register it seems excessive.

    Any recommendation for a garage that could do it or a cheaper diagnostic tool would be appreciated.

    Cheers.



Comments

  • Registered Users, Registered Users 2 Posts: 11,358 ✭✭✭✭User1998


    Try VAAS Autos



  • Registered Users, Registered Users 2 Posts: 1,217 ✭✭✭kindalen


    Anyone use the obd port type device to switch batteries?

    https://www.amazon.co.uk/AUTOOL-Emergency-Alligator-Digital-Detective/dp/B0DB8G6B1Z/ref=sr_1_5_sspa?dib=eyJ2IjoiMSJ9.uqZxozW13gFouP8GzoUDxyCJA4u92zGIn2zvkjjuBZg1cD7NleF4kHexauAwZ6lW26aVEUpY_VBT6AC8YIkCPdc7dy0fihbwitVo1zUr5NKSkMGU6C2eM7SM1bH99yFADvm-aiHj3VjDTHoYRWeLdjl-FWQ4BbQ164XSoFJCPkT1hl4GgPcsgmIu1x69u4fDgac_L5jMouMBPEEjEAViRGbA4uwYNcBVqqSMK6LX9cj6k6hNpeBiA8OzNL7B_AqeglKjAynmjyVDo8VYgBqqVy28x1mFZ3usW5bzrWp_i4k.E0bAk_YbenO3LSkI6GAXqyNNavimeSCjS8rliJAuqE8&dib_tag=se&keywords=obd+memory+saver&qid=1768591931&sr=8-5-spons&aref=93vGVIWWpT&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1



  • Registered Users, Registered Users 2 Posts: 425 ✭✭JP 1800


    What year and model?



  • Registered Users, Registered Users 2 Posts: 29 i_dont_know


    2013 Golf MK7 1.4 tsi.



  • Registered Users, Registered Users 2 Posts: 425 ✭✭JP 1800


    I can do that for you. Is the battery the same as the one currently in the car?



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  • Registered Users, Registered Users 2 Posts: 1,263 ✭✭✭fatbhoy


    If it's the same spec as the battery being replaced, I don't think it needs coding. I replaced my VW Caddy 2016 start-stop (AGM?) battery and it didn't need recoding: I read somewhere on the Internet that I'd be okay, so I bought it, fitted it myself, and it worked fine.

    Edit: A Google AI search seems to recommend coding it even if it's the same spec as the old one.



  • Registered Users, Registered Users 2 Posts: 425 ✭✭JP 1800


    It Will need coding, as when batteries age the current and voltage requirements change in order to sufficiently charge them. If the gateway on the car thinks the battery is old, it will over charge the new battery and reduce its lifespan considerably



  • Registered Users, Registered Users 2 Posts: 425 ✭✭JP 1800


    When coding a battery, you tell the car the battery type, how many Ah, manufacturer and serial number, the last 2 aren't as important



  • Registered Users, Registered Users 2, Paid Member Posts: 5,747 ✭✭✭...Ghost...


    If the gateway thinks the battery is old and has lower capacity, wouldn't the battery be under charged, rather than over charged. Still not good, but worth a mention. Ridiculous that a 12V battery needs coding to a car. I can change the ink cartridges in my printer and the printer will ask if I have installed new cartridges and acts accordingly. I'm sure car manufacturers could very easily do the same.

    Stay Free



  • Registered Users, Registered Users 2 Posts: 425 ✭✭JP 1800


    It's a good question, however as I understand it, aging batteries have higher internal resistance, hence need higher voltages to overcome this and charge the battery, even though they will have less capacity.



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  • Registered Users, Registered Users 2, Paid Member Posts: 5,747 ✭✭✭...Ghost...


    The Hx (resistance) doesn't mean you need higher voltage, but it does mean that the battery will take longer to charge back up to capacity. It also means more heat over longer charge cycle periods, resulting in faster degradation. A battery with high resistance is due to dendrite formation as a result of heat and age, correlated with number of cycles, or part cycles in the case of a 12V car battery. As it nears end of life, dendrites cause self discharge/leakage and reduces the stability, causing the voltage to drop and fail under load.

    Anyway, that's a bit off track. Car manufacturers are taking the p1ss with this sort of con job. It should be an in car prompt when the 12V battery is re-connected, or replaced. Answer a couple of optional battery questions, such as Ah, V and manufacturer etc. Job done.

    Stay Free



  • Registered Users, Registered Users 2 Posts: 29 i_dont_know


    Thanks for the offer but I got it sorted. It was a different spec battery but a friend of a friend had Carista and registered it for me.



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