Sonata hybrid 2013 battery issue

We have a 12v battery for storing electric for normal car stuff with the inverter used to charge the 12v battery,, 12v also used to operate the misc to turn on the 277v Hybrid battery for A/C and electric motor at A/T

Look at production date of chassis, figure the battery to slight older manufacture and sit in rack before install to chassis when car built..for most part,, most OE installed battery to Hyundai is a crap shoot after 4yr..

Since this past Nov, I have replace maybe 4 Power relay for 277v to run car, maybe 3 Electric Oil Pump for A/T,, the pump gear gets broke loose from electric motor shaft and trans slam into R or D after shift and step on pedal.. done 1 ATF Temp Sensor, what a PIA... couple inverter coolant bottles leak, hot inverter make odd things happen for drive

da-cena-fan said:

Hi,

My car would not start and I had to get it jump started twice last week. It's in the shop right now as I write this. They will do a battery charge test for $65 (is this normal??)

I asked them if my warranty would cover the battery replacement if required. They said that only big battery is covered by lifetime warranty, not the small one. Is this true? I did not even know there were two batteries!

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Yes, this is true. Pretty much all hybrids have a traditional lead-acid 12V battery; the exceptions are some Hyundai Ioniqs and Kia Niros, where they've replaced the lead acid battery with a single cell of the LiPo battery.

As was mentioned, the 12V battery is to power most of the electronics in the car (radio, lights, climate control except for the A/C). Also, the 12V battery initially powers the computers and reconnects the LiPo battery, which is disconnected when the car is off (for safety reasons).

If you ever want to see the 12V battery, it is in the trunk on the right side, behind the "door" there. Like all 12V batteries, it has a life span of maybe 5 years (depending on the environment you drive in, as heat lowers the batteries lifespan). If you have a 2015 or older Sonata Hybrid, it would make sense that the battery needs to be replaced and, like all 12V batteries, it is not covered by the Hyundai warranty.

Why pay to have the battery tested? That’s just ridiculous! I would just try to get it to AutoZone or Checkers and have them test it for free. ****, even Walmart does it for free (at least the Walmart’s here where I live do). $65 to test the battery and then another $150 to replace it?!

Jc0187 said:

Why pay to have the battery tested? That’s just ridiculous! I would just try to get it to AutoZone or Checkers and have them test it for free. ****, even Walmart does it for free (at least the Walmart’s here where I live do). $65 to test the battery and then another $150 to replace it?!

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Next is going to be the cost of the battery, if or when they say it needs replaced. Ridiculous and there are threads on here about a bolt in battery that can be ordered where the cost is reasonable compared to the ridiculous dealer one.

Thanks for the inputs! Just heard back from the dealer, the 12V battery is indeed dead. New one is going to cost ~$350, plus another $50 for service. They waived the battery charge test cost.

da-cena-fan said:

Thanks for the inputs! Just heard back from the dealer, the 12V battery is indeed dead. New one is going to cost ~$350, plus another $50 for service. They waived the battery charge test cost.

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They waived it because they are robbing you still. Had the battery tested good somehow they still wanted some money...

People on here have gotten direct replacement batteries for less than $150. $400 is disgusting really, sorry. You know how to replace a battery?

Thanks to Skunkape and Vinnyg!

http://www.hyundai-forums.com/sonata-all-hybrid-models-yf-lf/595921-found-12v-battery.html