2018 Hyundai Elantra Headlight Bulb Upgrade Advice - Hyundai Elantra Forum
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post #1 of 3 (permalink) Old 07-10-2018, 01:44 PM Thread Starter
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2018 Hyundai Elantra Headlight Bulb Upgrade Advice

Hello All,

Iím brand new to this forum as I just purchased a 2018 Elantra Value Edition. I am not satisfied at all with the halogen headlights as my previous Mazda had Hid. I knew Iíd want to upgrade them to an aftermarket bulb kit. I am wondering if LED or HID would be better? I had an HID kit in my 2012 Kia Optima that was great for awhile then randomly started shutting off while driving. Also I noticed the Elantra indicates if the bulb is blown out, and with the lower current draw Iím guessing this could be an issue. Could someone please direct me to a decent output LED or HID kit thatís going to be reliable and have no bulb outage errors?

Thank you so much,

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post #2 of 3 (permalink) Old 08-18-2018, 07:28 PM
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For LEDs, there WILL be bulb outage errors, but it is not that bad.

I have tried with three different LEDs, hikari, opt7, and oxbeam. All of them show error. There is no way out of those errors except HID.
I've had these amazing OPT7 ones for couple of months now on my 2018 elantra SEL.
These are as bright as my HID on a mazda, but whiter, although both are 6000K. HID link below for comparison.
Although there are bulb out warning in the dash with LEDs, I've managed to ignore them. Initially it was irritating, but withing a week, I started not noticing it any more. With just a click on the ok button on the steering (as soon as I switch on the car), the warning goes away and my default speedometer comes back on.

I supposed you could use HIDs, but that would require drilling through the dust cap, and I don't want to scratch any OEM item.

I'd strongly suggest you to try the LED for a week and see if you can be habituated with the warnings.

Last edited by piby2; 08-18-2018 at 07:32 PM.
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post #3 of 3 (permalink) Old 08-27-2018, 11:22 PM
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As mentioned, LEDs will give bulb out warning on 2018 Elantras, because this car definitely has a system check. The car computer probably checks for current drawn and sends a warning if low amount of current is drawn. Therefore adding the LED gives a dash warning. So I added this resistor to my low beam 9005 bulb, and the warnings are gone now.

The installation was easy plug and play, add the resistor to the car adapter, then add the bulb adapter to the resistor, zip-tie everything and done.

The resistor get extremely hot, so I screwed it to a metal plate. Fortunately my 2018 elantra has a couple of holes nearby for screwing. Just to be sure, I will add some heat resistant tape as well.

But the low beam dust cap needs to be removed. I plan to buy a pair of spares, and drill small hole to get the wirings through it.
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