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NGK

NGK LKAR6AIX-11 Iridium IX Spark Plug (91187 Iridium Ix), 4 Pack

  • Based on 1,750 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Oct 4
Order within 14 hours and 42 minutes
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Features

  • Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling
  • The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect
  • Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage
  • Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines
  • Trivalent Metal Plating provides superior anti-corrosion and anti-seizing properties

Description

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect. Longer insulator nose prevents fouling, the corrugated ribs on insulator prevent flashover, and a triple gasket seal eliminates combustion gas leakage. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines. Trivalent metal plating - superior anti- corrosion and anti-seizing properties.

Brand: NGK


Core Material: Iridium


Thread Size: 14mm


Top Material Type: Metal


Vehicle Service Type: Car, Truck


Brand Name: NGK


Manufacturer Part Number: LKAR6AIX-11


Global Trade Identification Number: 70


Number of Items: 4


Item Highlight: Replaces XP5684. 40k-60k mileage rated.


UPC: 087295811870


Unit Count: 1 Count


OEM Equivalent Part Number: LKAR6AIX-11


Included Components: Spark Plug (4)


Item Weight: 6.4 ounces


Item Type Name: Spark Plug (91187 Iridium Ix )


Manufacturer: NGK


Model Number: LKAR6AIX-11


Manufacturer Warranty Description: Includes manufacturer provided warranty


Thread Size: 14mm


Compatible with Vehicle Type: Car, Truck


Automotive Fit Type: Vehicle Specific Fit


Gap Size: 0.03 inches


Core Material: Iridium


Top Material Type: Metal


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Oct 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Top Spark Plug Choice for My 2013 Nissan Sentra SV
I recently grabbed a 4-pack of NGK LKAR6AIX-11 Iridium IX Spark Plugs for my 2013 Nissan Sentra SV, and I'm absolutely stoked about it. These spark plugs slid right into my car like they were made for it, and ever since I put 'em in, my car's been running like a champ – not a single hiccup to report. My decision to change the plugs came from a recommendation by the mechanic at the car showroom. I didn't fancy forking out over $350 to the service center for what turned out to be a pretty straightforward job. But what's really ripper about this purchase is the price. Snagging a set of four branded spark plugs at such a fair dinkum rate is an absolute steal. I'm chuffed with this product, and it's given my car a real performance boost. I reckon anyone after a reliable and budget-friendly solution should give these spark plugs a burl. G'day! ... show more
Reviewed in the United States on October 19, 2023 by Sanjay
    • Worked great
Good quality NGK spark plugs, immediately brought back the snappiness to 2.5 Altima. These say they are pregapped at .030”, they each varied in their gap, double check this before install.
Reviewed in the United States on February 23, 2026 by Ashley McCracken
    • Working good.
Good product.
Reviewed in the United States on April 18, 2026 by Alfred J Das
    • Good value
Fit 2009 Altima 2.5 with no issues. Running fine so far.
Reviewed in the United States on April 6, 2026 by mattyv
    • Keep your car in perfect condition with this part.
Review Image by Anaday Moya
bought this part for my 2012 Nissan, and it was a perfect fit. My car is now in excellent condition thanks to this part I found. NGK LKAR6AIX-11 Iridium IX Spark Plug (91187 Iridium Ix), 4 Pack Replaces XP5684. 40k-60k mileage rated.
Reviewed in the United States on September 7, 2026 by Anaday Moya
    • Good quality OEM replacement part.
I was skeptical but they were the exact replacement spark plugs for my daughters Nissan. Not the cheapest but comes with peace of mind with a good quality part.
Reviewed in the United States on November 9, 2023 by Amazon Customer
    • Perfect Fit and Properly Gapped NGK Spark Plugs💫💫💫💫💫
I purchased this set of 4 NGK spark plugs for my Nissan Sentra. They arrived well packaged and, most importantly, all four plugs came properly gapped and ready to install. The quality looks excellent, and installation was straightforward. Everything fit as expected and the plugs are working well so far. Very satisfied with the purchase. ... show more
Reviewed in the United States on September 19, 2026 by A.Felix
    • Sparkers for 2015 Nissan Rogue Select 2.5L
Probably 10k miles on these. Removed the coil packs and spark plugs one at a time. Replaced old plugs at 80k miles. Fairly easy job. Plugs were pre-gapped. Smooth burning plugs I'd say. Used to run NGKs in my motorcycles. Tried Champions and Autolite plugs in my other vehicles. I'll stick with NGKs. Don't even know they're there. ... show more
Reviewed in the United States on April 14, 2026 by SamG

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