If you’re asking about brands, I always go NGK. They’re definitely my preference. They have a coating on the threads and don’t require grease when you install. And they come pre gapped.
NGK !!!
Next day guy at the auto parts store tells me to try ngk iridium’s and it works automatically. If you’re planning to replace your spark plugs save your self the time and money and buy ngks over anything.
I replaced the plugs again (from Brisk to NGK R7437-9) and rotated the coil packs to try and resolve the misfire issue. I also re-flashed both the ECU and TCU tunes, and the cold start misfire issue appears to be fixed.
Atualmente uso velas e bobina NGK. Perfeitas.
I’ve been a Toyota certified master diagnostic tech for nearly 30 years. I can tell you that I’ve seen Toyotas come in running poorly and all we do is scrap the off brand plugs with either NGK or Nippondenso and the car runs fine again.
Based on your parts list, I'd recommend getting the Denso or Hyundai branded ignition coil. Denso is the OEM for Hyundai. For spark plug, get the NGK 9723. These are the OE spark plug for Hyundai.
So, I changed spark plugs in an old Ford Focus 2001. And currently there's no way I can get the original Motocraft spark plugs, so I bought and installed the NGK ones which are supposedly compatible with my vehicle. I used them a week, but since the start I noticed great differences in size in the threads and in the shape of the head. Is this a problem?
I would return them and get Motorcraft anyway. Champion is garbage.
On my stage 2 mk7 I swapped around and tried a few like ngk and the ngk failed causing misfires like crazy on acceleration. Back to OEM and never had another issue for 45k miles.
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