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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW Passat Family (NMS and B7) TDIs (2012+)

VW Passat Family (NMS and B7) TDIs (2012+) Discussion area for the 2012+ Passat TDI (North American and rest of world versions versions). The North American model was previously codenamed NMS (New Midsize Sedan) and the version the rest of the world gets is sometimes referred to as B7.

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Old January 19th, 2014, 19:49   #1
CNNPress
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Default How long did your battery last?

The battery of my 2012 Passat TDi was dead yesterday. Tried to jump start it, did not work. VW road side assistant came, and also failed to jump start. Then, they towed away the car to the dealership. I know I could just buy a battery and replace it by myself, but I just wanted to make sure battery was the only problem. It sucks that they only cover battery for 24,000 miles or 2 years, whichever comes faster, and I was 25,xxx miles. So I had to pay 190 for the battery...

How long did your battery last?

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Old January 19th, 2014, 20:17   #2
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Are you leaving the key in the ignition overnight? That is rumored to leave control modules open and can dis-charge the battery. I wouldn't think any NMS owner would need a replacement yet unless the batt has been totally drained flat several times and under charge damaged. As for life, I normally get 5 years on open vent acid filled type, 10 years on my Optima's and 10-15 years on quality sealed AGM like this nice group 48 that fits our NMS > http://www.sears.com/diehard-advance...2&blockType=G2 .
Oh, BTW My 2001 Civic is still going strong on the original
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Old January 19th, 2014, 21:31   #3
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Gulp - just hit 26K this weekend. Battery still strong. Per some measuring block data that I pulled last weekend for DPF statistics, I have 4256 manual engine starts for 890+ hours engine run time. And I have drained the battery a few times where it wouldn't start the car when slogging through byte 18 codes last year. Still going strong, so far. I've left my key in the car overnight (w/ KESSY), locked in the garage without incident. Hopefully your experience will not be mine anytime soon.
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Old January 20th, 2014, 05:41   #4
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There is a special offer going on with batteries - did they give it to you? http://www.begoodtoyourvw.com/special-offers/

My dealer knew nothing of the rebates going on.
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Old January 20th, 2014, 09:17   #5
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As a motorsports junkie, im a huge fan of AGM battery's over the stock fluid filled ones. They almost always have hundreds more cold cranking amps and best of all, zero corrosion as they are sealed!
I have had all of these manufactures AMG batteries last 10+ years in my powersports toys that are trickle charged in the off season:
Optima
Enersys (expensive but by far the best batt on the planet)
odyssey
Sears platinum (made by enersys)
Just put a Exide AGM in our boat, jury still out
info:
http://batteryuniversity.com/learn/a..._glass_mat_agm
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Old January 20th, 2014, 12:51   #6
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Might be more going on...especially if you couldn't jump start it. I'd be pissed if my battery lasted anything less than 5 years.
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Old January 20th, 2014, 14:59   #7
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Quote:
Originally Posted by pparks1 View Post
Might be more going on...especially if you couldn't jump start it. I'd be pissed if my battery lasted anything less than 5 years.
I think a defective battery is the best explanation. What else would be going on? A shorted / dead cell will cause that situation.
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Old January 20th, 2014, 15:16   #8
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Hmm... i wonder if this would work?
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Old January 20th, 2014, 16:41   #9
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That says "DEEP CYCLE" . It's for RV's, boats etc that are not used for vehicle's starting use.
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Old January 21st, 2014, 07:34   #10
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Mine is still going strong, It will be 2yrs old in July. The past 8 Months or so I've had my AMP installed as well so it's seeing some use
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Old January 21st, 2014, 07:40   #11
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We're having issues with control modules not going to sleep, too... still haven't gotten to the bottom of it. Considering adding a second battery in the stock VR6 location in the trunk. My personal opinion is that the single stock battery is too small for the huge electrical loads in the Passat.
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Old January 21st, 2014, 09:31   #12
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Whaaaaaaat? I'm still on my original battery which was manufactured in 2003 and has been in constant service since I picked up my car in January 2004.

Your battery was defective. Two years is unacceptable.
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Old January 21st, 2014, 09:54   #13
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Quote:
Originally Posted by Mike_04GolfTDI View Post
Whaaaaaaat? I'm still on my original battery which was manufactured in 2003 and has been in constant service since I picked up my car in January 2004.

Your battery was defective. Two years is unacceptable.
That's great and all, but I would say that your situation is not the norm, nor does it relate to the new cars with much higher electrical draw.
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Old January 21st, 2014, 22:43   #14
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the NMS holds it own, I watch my wife back out of the garage and kick the seats on high while turning the wheel, zero headlight dim!
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Old January 22nd, 2014, 04:29   #15
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2 1/2 years since car was built. Nary a problem, car is garaged, never in excessive heat or cold. Car remains unlocked in the garage (Kessy, both keys well away from the car), the longest we've gone w/o running it was about 8 days, started right up, no issues.
Just curious. Is there a stronger battery that fits the stock opening?
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