MK7 Golf, disconnecting the battery
Discussion
I noticed a build up of white battery "fur" deposit around the base of the battery on my MK7 Golf when I checked the oil yesterday. I want to remove the battery and clean it up but was wondering if there are any special notes for disconnecting and reconnecting the battery? I hear some new cars today have to have the dealer code the battery to the car or similar when they are replaced, but I am not sure on a simple disconnect/connect of the existing battery.
Anyone in the know?
Anyone in the know?
Coding is only relevant if you're replacing the battery with another of different age. For what you're looking to do it's fine just to disconnect.
Whatg age is yours, out of interest? Not noticed any deposits on mine, but then it's wearing an insulation blanket so I might just not be looking all that carefully!
Whatg age is yours, out of interest? Not noticed any deposits on mine, but then it's wearing an insulation blanket so I might just not be looking all that carefully!
Adrian E said:
Coding is only relevant if you're replacing the battery with another of different age. For what you're looking to do it's fine just to disconnect.
Whatg age is yours, out of interest? Not noticed any deposits on mine, but then it's wearing an insulation blanket so I might just not be looking all that carefully!
I think its a late 2016 build date, but a 2017 model year car (US spec btw). It has the black fabric insulation blanket on it. I'll try to post a photo later. 29k miles, 1.8 SE Sportwagen. Deposits were clearly visible in the lower left corner as you look down on the battery.Whatg age is yours, out of interest? Not noticed any deposits on mine, but then it's wearing an insulation blanket so I might just not be looking all that carefully!
geeman-a lot of VAG have the radio code built in to the CPU, so that if the battery is removed and radio code gets disabled, then at power up, radio talks to CPU and code is re established. For the white fur, I'd remove battery and treat the area with an alkaline solution( as fur is most possibly acid reaction-as in acid meets metal), then water( to remove salts) ,and when dry paint the area to prevent further corrosion. I'd also be looking at exterior of battery to see WHY there was acid seeping to cause furring of the battery area.
Just following up on what's happened. I removed the battery, its the original, and found it has a leak (see photos). I cleaned up the area of the battery tray and refitted the battery. Warning lights for ESC and TP came on but went out after a few metres driving. No problems otherwise.
I dropped into the local main dealer to ask about the battery. The car ran out of the factory warranty at the end of October, but the service manager said he'll replace the battery FOC, so result,
Some photos of the damage.
The bottom of the battery tray with the battery removed.
The battery, showing the leak.
The battery hold down bracket, corroded by the leak.
I dropped into the local main dealer to ask about the battery. The car ran out of the factory warranty at the end of October, but the service manager said he'll replace the battery FOC, so result,
Some photos of the damage.
The bottom of the battery tray with the battery removed.
The battery, showing the leak.
The battery hold down bracket, corroded by the leak.
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