Battery upgrades for 2015 GSW?

TDI4evah · January 2nd, 2018, 06:56

Hi All;

My 2015GSW, purchased last halloween, refuses to start in this cold weather (0 to low negative degrees). The dealer says the battery is only warranted for 2 years and won't replace it under warranty.

I talked with the local service manager, and they swear the TDI's use the same battery as their gas counterparts. The parts manager said the rating is for 360 CCA. A friend of mine just put a new battery in his 2003 jetta that was rated at 800 CCA.

360 sounds absurd to me for a diesel in Maine winters. Has anyone upgraded their battery? What should I look for when I replace this one?

TIA

jdstrd · January 2nd, 2018, 07:25

I just put a new interstate in my 2015 GSW TDI S model. I went with the larger battery that went in the the SEL'S (girlfriend has a SEL). So I know that the TDI models (at least mine) have diffent batterys.

740GLE · January 2nd, 2018, 07:27

VW did down size the battery of the '15 TDIs compared to 09-14 TDI.

Heres a good write up that applies to a TSI going for a larger battery, it applies to the GSW TDI as well.

http://www.golfmk7.com/forums/showthread.php?t=7926

Moral of the story, the battery bracket can be moved and larger series "096" battery can fit. Dealer won't be much help with getting you the larger battery unless you call out the specific part number of an '09-'14 TDI battery.

turbobrick240 · January 2nd, 2018, 09:41

Quote:

Originally Posted by TDI4evah

Hi All;

My 2015GSW, purchased last halloween, refuses to start in this cold weather (0 to low negative degrees). The dealer says the battery is only warranted for 2 years and won't replace it under warranty.

I talked with the local service manager, and they swear the TDI's use the same battery as their gas counterparts. The parts manager said the rating is for 360 CCA. A friend of mine just put a new battery in his 2003 jetta that was rated at 800 CCA.

360 sounds absurd to me for a diesel in Maine winters. Has anyone upgraded their battery? What should I look for when I replace this one?

TIA

The parts manager must have been quoting the DIN amperage rating. 360A DIN is equivalent to about 650 CCA SAE. Here's a conversion table with SAE, EN, and DIN ratings:

https://www.scribd.com/mobile/docume...rom-DIN-to-CCA

2010golf · January 2nd, 2018, 20:46

Been running these in my jeep for many years. No issues at all.
Little spendy I paid $220 on sale but I found the 34r fit perfect in my 2010

https://shop.odysseybattery.com/p/34r-pc1500t

Grigg3 · January 3rd, 2018, 08:10

Here’s a very well researched thread on upgrading the battery.
http://www.golfmk7.com/forums/showthread.php?t=7926

Looks like some changes are required with VCDS for the car to accept and manage the new/different battery properly. The computer/alternator must charge differently for different types and sizes of battery?

Perhaps just for cars with Battery Control Modules, BCM, which comes as part of stop and start feature

740GLE · January 4th, 2018, 05:22

Quote:

Originally Posted by Grigg3

Here’s a very well researched thread on upgrading the battery.
http://www.golfmk7.com/forums/showthread.php?t=7926
Looks like some changes are required with VCDS for the car to accept and manage the new/different battery properly. The computer/alternator must charge differently for different types and sizes of battery?

Great link!!!!

viking427 · January 4th, 2018, 18:08

The larger Group 48 Bosch AGM fits great. Move the bracket to the end, replace the blanket with the larger one in that link and all's good.

Funguy · January 4th, 2018, 20:59

Quote:

Originally Posted by TDI4evah

Hi All;

My 2015GSW, purchased last halloween, refuses to start in this cold weather (0 to low negative degrees). The dealer says the battery is only warranted for 2 years and won't replace it under warranty.

Did you buy it as new last halloween? If so they were supposed to put in a fresh battery I believe and you should be under warranty.

EECSentric · January 8th, 2018, 08:47

I found my battery dead yesterday after our recent cold snap.
I was able to find one Bosch Group 48 AGM at a not-too-nearby pepboys. The Install was much easier than I expected and I didn't even have to pull the airbox. Recoding for the new battery and clearing all the codes took more time than the swap.

I haven't had a chance to replace the battery blanket yet so I just used the old one (with a gap in the back). I also had an oddity that I couldn't find the adaptation in VCDS to enable the battery SOC indicator but it isn't a big deal.

Thanks everyone for the help (here and on golfmk7) especially to viking for the confirmation that the Bosch group 48 fits.

deming · January 14th, 2018, 03:17

Has anyone in the Midwest done the larger battery upgrade on their 2015 ./ 2016 Golf TDI ?

I would love to get this done to my 2015 Golf TDI Wagen, but I don't have the computer / vag com to change the vehicle settings accordingly.

Anyone between Chicago, IL and Iowa City. IA willing to help me out ?

deming · January 28th, 2018, 23:04

Nobody ???

oilhammer · January 29th, 2018, 05:17

Why do you think you need an "upgrade"? Which Ah battery does your car currently have?

740GLE · January 29th, 2018, 05:31

swap to the next size up as indicated by the links, due to the smaht ECU/BCM it changes how it charges the battery depending on size and type, so he's looking to have some help with coding.

I'd wonder what percentage of life you gain by coding, 5-10% so 2-3 months?

oilhammer · January 29th, 2018, 05:38

Reason I asked is some A7 Golfs have the 60 Ah unit, some have the larger 70 Ah unit already. I don't think you can physically fit the big 80 Ah unit in there and still have it be secure.