[OlinhaP]

Greetings folks, came here hoping to get an honest answer to my question.

So I took my 2017 Elantra Limitted to a tire shop for a bad battery (1st mistake I suppose). They put in a ACDelco 48GHR "flooded" type unit. I didn't know about AGM's at the time, now I'm worried that a AGM was mandatory and this one could cause harm.

It's been in a month so far, do I need to replace it with an AGM type?

 

[Circuitsmith]

Was your original battery AGM?
The battery in my 2017 Tucson is not.
It's mostly cars with start-stop (engine shuts off when you come to a stop) and luxury models loaded with electrical accessories that come with AGM.
If the original was AGM a flooded battery will not hurt the car, but the battery may not last as long as an AGM because it's not being charged in an optimum way.

 

[OlinhaP]

Was your original battery AGM?
The battery in my 2017 Tucson is not.
It's mostly cars with start-stop (engine shuts off when you come to a stop) and luxury models loaded with electrical accessories that come with AGM.
If the original was AGM a flooded battery will not hurt the car, but the battery may not last as long as an AGM because it's not being charged in an optimum way.

Thanks for the reply. I didn't notice what the original was, but all my research for the correct replacements points to it having been AGM. Yes, I saw in the specs for the 48GHR, that it is compatibile with your Tucson, but my Elantra is not on that compatibility list.
This AGM business is all new to me, I stumbled on to it while looking under the hood and googling the installed battery. Til now all my cars had been old school. Ignorance is bliss perhaps?

 

[Jav2008]

Wow, they may be put in the wrong battery. Possibly be fine. But, I have a 2017 Hyundai Elantra SE, and I replaced my OEM battery with a Duralast Platinum AGM.

https://www.autozone.com/batteries-starting-and-charging/battery/p/duralast-platinum-agm-battery-h6-agm-group-size-48-760-cca/319460_0_0

I checked and it looks like the 2017 SE, Value, eco, and Limited needs size H6 48. But, the sport is an H5.

 

[oragex]

I run flooded instead of AGM but I prefer removing the fuse from the AMS sensor which may give too higher voltage for standard acid-lead batteries

 

[NDSE]

Wow, they may be put in the wrong battery. Possibly be fine. But, I have a 2017 Hyundai Elantra SE, and I replaced my OEM battery with a Duralast Platinum AGM.

https://www.autozone.com/batteries-starting-and-charging/battery/p/duralast-platinum-agm-battery-h6-agm-group-size-48-760-cca/319460_0_0

I checked and it looks like the 2017 SE, Value, eco, and Limited needs size H6 48. But, the sport is an H5.

That Duralast Platinum AGM is the battery I ended up with. Sam's, Wal-Mart did not have an AGM battery for my car and would not sell me a flooded battery. If it was mine I would have the tire shop install the recommended battery and sleep well at night.

 

[Victeknical]

They put in a ACDelco 48GHR "flooded" type unit. I didn't know about AGM's at the time, now I'm worried that a AGM was mandatory and this one could cause harm. It's been in a month so far, do I need to replace it with an AGM type?

Even though the flooded battery might be fine, I would consider the car warranty. If something were to go wrong with the electrical system and you brought the car to Hyundai for warranty service would they deny service because of the out-of-spec battery? I don't know, but it seems possible and personally, I wouldn't expose myself to that - just my 2 cents. Good luck and let us know how it goes.

 

[reemoe]

Even though the flooded battery might be fine, I would consider the car warranty. If something were to go wrong with the electrical system and you brought the car to Hyundai for warranty service would they deny service because of the out-of-spec battery? I don't know, but it seems possible and personally, I wouldn't expose myself to that - just my 2 cents. Good luck and let us know how it goes.

I agree. I replaced mine with an AGM battery from NAPA last November for $250. Not worth saving $100 by getting a lead acid battery.