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Hyundai Veloster 12V Automotive Battery Replacement Guide
How to change a dead 12 volt car battery in a 1st generation 2012 to 2017 Hyundai Veloster including part numbers.

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2017 Veloster Engine Bay
Loosen Counterclockwise
Pull Off Negative Terminal
This automotive maintenance tutorial was specifically written to assist owners of the first generation (2012, 2013, 2014, 2015, 2016 and 2017) Hyundai Veloster in changing a dead 12 volt car battery in the engine bay.

Owners of other Hyundai or Kia vehicles such as the Elantra, Sonata, Azera, Santa Fe, Tucson, Accent, Ioniq, Genesis, Tiburon, ix20, i20, i30, i40, Veracruz, Optima, Cadenza, K900, Soul, Niro, Sportage, Sorento, Sedona, Rio, Forte and Spectra may also find these DIY instructions to be helpful.

The OEM battery from Hyundai was a Rocket brand part number CMF45L-DIN.

A few compatible replacement "Group Size" H5, 26R or 47 12V batteries with their part numbers as follows: ACDelco 47AGM, Champion 26RH600CH and EverStart MAXX-H5.

The tools needed to remove and replace the 12V battery include a 10mm socket, a 1/4" drive ratchet, a 12mm socket, a 6" or 9" extension bar and a 3/8" drive ratchet.

Cover & Tuck Away
Push In Release Tab
Open "+" Terminal Cover
The first two steps are to open the hood and then move to the right side of the engine bay.

The 12 volt car battery is located on the right (driver) side of the engine bay behind the air filter box and next to the electrical fuse box.

I recommend wearing gloves and protective eyewear during this procedure.

Loosen the nut on the negative "-" terminal by turning it counterclockwise with a 10mm socket and a 1/4" drive ratcheting wrench.

Pull the negative terminal off the "-" battery post, wrap it in a small towel and tuck it away on the right side of the battery to help prevent electrical contact.

Then push in the release tab on the black plastic cover on the positive "+" terminal.

Swing open the cover to access the positive terminal nut.

Loosen Counterclockwise
Pull Off Positive Terminal
Tuck Away On Left
Loosen the 10mm positive terminal nut by turning it counterclockwise.

Pull the positive terminal off the "+" battery post.

Close the plastic cover over the positive terminal and tuck it away on the left side of the battery.

Extension Bar & 12mm Socket
Remove Heat Shield Box
Battery Clamp Bolt
Pull the fabric and foam heat shield box off the old battery and set it aside in a safe place for re-installation later on.

Attach the 12mm socket to a 9" extension bar and the 3/8" drive ratchet.

Locate the single bolt holding the battery hold down bar or "clamp" at the front bottom of the battery tray.

Loosen Hold Down Bar
12mm Bolt Removed
Battery Hold Down Clamp
Loosen the 12mm bolt on the hold down clamp by turning it counterclockwise.

Lift the hold down clamp and the 12mm bolt off the battery tray and set it aside in a safe place.

Lift Out Old Battery
Old Battery Removed
Rocket # CMF45L-DIN
Raise the handle on the old battery and carefully lift it out of the engine bay.

Gently set the old battery on the ground.

Try to avoid dropping or tipping over the old battery to prevent from having acid leak out.

Be sure to bring the old battery with you to Walmart or the auto parts store to prevent from having to pay a "core', "disposal" or "recycling" fee.

If you can wait a few days for delivery, I recommend buying the ACDelco 47AGM 12V battery.

The OEM battery from Hyundai / Kia was the Rocket brand part number CMF45L-DIN.

Update - I received an email from another Veloster owner with the following information -

"I just replaced the battery in my 2017 Veloster. I have some interesting info that I found out that may help your readers with their replacements. Apparently, Hyundai uses two different batteries in the 2017 models: a 140R H4 45Ah, and a larger H5 60Ah. The 140R H4 is an exact fit for the smaller battery. My guess is that since my car was built in Ulsan, South Korea, and some were built in the US, that this may be the reason for the battery differences. But the H4 is the match for the smaller battery, and the H5 is the larger battery. For the larger battery, H5 should be an exact match. Interstate also makes this, and Hyundai sells an Interstate battery replacement for the H5 (part number 0027518001). You may want to provide your readers with that info. Will save them a lot of time looking. Thanks for providing the info and pictures! - Mark"

A special thanks to Mark for that info.

Clean Off Battery Tray
Lower In New 12V Battery
Hold Down Clamp & Bolt
Clean off any debris from the battery tray so that the new battery will rest evenly on it.

Carefully lower the new battery in to the engine bay with the positive "+" post on the left (passenger) side and the negative "-" post on the right (driver) side.

Lower In Hold Down Bar
Tighten Bolt Clockwise
Replace Heat Shield Box
Lower the hold down clamp to the front edge of the battery tray.

Tighten the 12mm bolt on the battery hold down bar by turning it clockwise until it is snug.

Double check that the new battery can not be moved, rocked or slid around on the battery tray.

If the new battery can be moved, tighten the 12mm bolt on the clamp an extra turn or two.

Lower the protective heat shield box over the top of the new battery.

If you've had a problem with corrosion (blue or white powder) building up on the battery terminals, consider installing some felt anti-corrosion washers over the battery posts.

Push On Positive Terminal
Tighten "+" Clockwise
Close Plastic Cover
First, push the positive terminal over the "+" battery post.

Tighten the terminal nut on the positive terminal in the clockwise direction with the 10mm socket and a 1/4" drive ratchet.

Try to avoid over tightening the terminal nut to prevent from damaging the battery post which could lead to an acid leak.

Flip the plastic cover closed over the positive terminal.

Push On Negative Terminal
Tighten Clockwise
12V Battery Replaced
Push the negative terminal over the "-" battery post.

Tighten the 10mm nut by turning it in the clockwise direction until it is snug.

Test the new battery by starting the engine and turning on the headlights.

Please adjust the time on the clock and program your favorite radio station pre-sets before you start driving.

Be sure to record the 12V battery change in your car's service records.

For more, check out all of my 2012-2017 Hyundai Veloster DIY Repair & Maintenance Guides.

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