{
    "lazyNodes": false,
    "abFitnotesFlag": false,
    "abCrawlReviews": false,
    "productOptionsCookie": false,
    "orderDelayFlag": false,
    "skipSessionCookie": false,
    "covidMessage": false,
    "fullTitleCookie": false,
    "nrLoggerCookie": false,
    "checkoutReviewCookie": false,
    "productOptionSeqCookie": false,
    "maintenanceFlag": false,
    "bufferETACookie": false,
    "multiShippingDiscountFlag": false,
    "newFitmentFlag": false,
    "surveyOptInFlag": false,
    "crossSellFlag": false,
    "skuMappingFlag": false,
    "paySplitCookie": false,
    "callDisableFlag": false,
    "zipPaymentFlag": "u",
    "hassleFreeReturn": false,
    "lifetimeReplacement": false,
    "cpn_off": false
}
Select your vehicle

Denso Spark Plugs

Refine by:
See All

Shop Catalog

Showing 1 - 15 of 1043 results
Display item:
15
30
45
Sort by:
4509 Platinum TT Series Spark Plug, Sold individually
Part Number: NP4509
Vehicle Info Required to Guarantee Fit
$9.99
Product Details
Notes : 5/8 in. hex size; Solid terminal type; Gasket seat style; Twin tip design; Titanium enhanced ground electrode; Machine rolled threadsSeries : Platinum TT SeriesSpark Plug Code : PTF16TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Sold individuallyWarranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 11.6 mm ReachGap Size : 1 mmHeat Range : 16Thread Size : 14 mm thread size
3144 Standard Series Spark Plug, Sold individually
Part Number: NP3144
Vehicle Info Required to Guarantee Fit
$9.49
Product Details
Notes : 5/8 in. hex size; Projected tip; Solid terminal type; Gasket seat style; ISO overall height; Machine rolled threadsSeries : Standard SeriesSpark Plug Code : K20PR-L11Quantity Sold : Sold individuallyWarranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 1.1 mmHeat Range : 20Thread Size : 14 mm thread size
5308 Iridium Power Series Spark Plug, Sold individually
Part Number: NP5308
Vehicle Info Required to Guarantee Fit
$8.99
Product Details
Notes : 5/8 in. hex size; Removable nut terminal type; Gasket seat style; Machine rolled threads; 0.4 mm center electrode; Iridium power electrode configurationSeries : Iridium Power SeriesSpark Plug Code : IXU22Quantity Sold : Sold individuallyWarranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 0.9 mmHeat Range : 22Thread Size : 12 mm Thread Size
4719 Iridium TT Series Spark Plug, Sold individually
Part Number: NP4719
Vehicle Info Required to Guarantee Fit
$15.49
Product Details
Notes : 16 mm Hex Size; (1) Ground Electrode; Tapered Seat Type; Platinum Twin-Tip Ground Electrode Tip Design; Twin-Tip ConfigurationSeries : Iridium TT SeriesElectrode Tip Material : Iridium-Rhodium Alloy Electrode TipQuantity Sold : Sold individuallyWarranty : 1-year or 12,000-mile Denso limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Nickel Copper Alloy Electrode CoreReach : 24.9 mm ReachGap Size : 0.04 in.Recommended Use : OE ReplacementHeat Range : 20Thread Size : 0.55 in.
4504 Platinum TT Series Spark Plug, Sold individually
Part Number: NP4504
Vehicle Info Required to Guarantee Fit
$11.99
Product Details
Notes : 5/8 in. hex size; Solid terminal type; Gasket seat style; ISO overall height; Twin tip design; Titanium enhanced ground electrode; Machine rolled threads; Kindly check the actual interchange part on denso website for perfect fitment.Series : Platinum TT SeriesSpark Plug Code : PK20TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Sold individuallyWarranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 1 mmHeat Range : 20Thread Size : 14 mm thread size
SET-NP4504-4 Platinum TT Series Spark Plug, Set of 4
Part Number: SET-NP4504-4
Vehicle Info Required to Guarantee Fit
$26.49
Product Details
Series : Platinum TT SeriesSpark Plug Code : PK20TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 4Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 1 mmHeat Range : 20Thread Size : 14 mm thread size
SET-NP4504-5 Platinum TT Series Spark Plug, Set of 5
Part Number: SET-NP4504-5
Vehicle Info Required to Guarantee Fit
$29.99
Product Details
Series : Platinum TT SeriesSpark Plug Code : PK20TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 5Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 1 mmHeat Range : 20Thread Size : 14 mm thread size
SET-NP4504-6 Platinum TT Series Spark Plug, Set of 6
Part Number: SET-NP4504-6
Vehicle Info Required to Guarantee Fit
$33.49
Product Details
Series : Platinum TT SeriesSpark Plug Code : PK20TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 6Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 1 mmHeat Range : 20Thread Size : 14 mm thread size
SET-NP4504-8 Platinum TT Series Spark Plug, Set of 8
Part Number: SET-NP4504-8
Vehicle Info Required to Guarantee Fit
$40.49
Product Details
Series : Platinum TT SeriesSpark Plug Code : PK20TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 8Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 1 mmHeat Range : 20Thread Size : 14 mm thread size
SET-NP4504-10 Platinum TT Series Spark Plug, Set of 10
Part Number: SET-NP4504-10
Vehicle Info Required to Guarantee Fit
$47.49
Product Details
Series : Platinum TT SeriesSpark Plug Code : PK20TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 10Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 1 mmHeat Range : 20Thread Size : 14 mm thread size
SET-NP4504-12 Platinum TT Series Spark Plug, Set of 12
Part Number: SET-NP4504-12
Vehicle Info Required to Guarantee Fit
$53.99
Product Details
Series : Platinum TT SeriesSpark Plug Code : PK20TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 12Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 19 mm ReachGap Size : 1 mmHeat Range : 20Thread Size : 14 mm thread size
4511 Platinum TT Series Spark Plug, Sold individually
Part Number: NP4511
Vehicle Info Required to Guarantee Fit
$11.99
Product Details
Notes : 5/8 in. hex size; Solid terminal type; Tapered seat style; Twin tip design; Titanium enhanced ground electrode; Machine rolled threadsSeries : Platinum TT SeriesSpark Plug Code : PT16TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Sold individuallyWarranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 18 mm ReachGap Size : 1 mmHeat Range : 16Thread Size : 14 mm thread size
SET-NP4511-4 Platinum TT Series Spark Plug, Set of 4
Part Number: SET-NP4511-4
Vehicle Info Required to Guarantee Fit
$26.49
Product Details
Series : Platinum TT SeriesSpark Plug Code : PT16TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 4Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 18 mm ReachGap Size : 1 mmHeat Range : 16Thread Size : 14 mm thread size
SET-NP4511-6 Platinum TT Series Spark Plug, Set of 6
Part Number: SET-NP4511-6
Vehicle Info Required to Guarantee Fit
$33.49
Product Details
Series : Platinum TT SeriesSpark Plug Code : PT16TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 6Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 18 mm ReachGap Size : 1 mmHeat Range : 16Thread Size : 14 mm thread size
SET-NP4511-8 Platinum TT Series Spark Plug, Set of 8
Part Number: SET-NP4511-8
Vehicle Info Required to Guarantee Fit
$40.49
Product Details
Series : Platinum TT SeriesSpark Plug Code : PT16TTElectrode Tip Material : Platinum Electrode TipQuantity Sold : Set of 8Warranty : 1-year Denso limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Electrode Core Material : Copper Electrode CoreReach : 18 mm ReachGap Size : 1 mmHeat Range : 16Thread Size : 14 mm thread size
Page 1 of 70 | Showing 1 - 15 of 1043 results

Top Rated Products

I got a 4 pack for 20 bucks or so when all the other brands are 10 bucks each. I feelSee More
Ruth C.
VERIFIED PURCHASER
Parts and delivery great.
Essie S.
VERIFIED PURCHASER

Product Questions & Answers

Q:Do they come adjusted already?
Cristhian D.
A:BEST ANSWERHi Cristhian, thank you for reaching out. Yes, they do. These spark plugs are ready for installation. You can use this link to order the part and take advantage of our low price for this item: https://www.carparts.com/spark-plug/denso/set-np4511-6?can=CPAP3648_CSQA_20230731 I hope this helps. Enjoy shopping. Show less
Aldrin P.
 
1 Question, 1 AnswerView all Q&As >
Q:Are these spark plugs calibrated?
Gerardo T.
A:BEST ANSWERHi Gerardo, thank you for reaching out. Yes, they are. You can click the link below to order the set while stocks last. Have a good one! https://www.carparts.com/spark-plug/denso/set-np4511-8?can=cpab2020_csqa_20230615 Show less
Andrew B.
 
3 Questions, 1 AnswerView all Q&As >

Customer Guides

A faulty spark plug can cause minor to severe problems not only to your engine but also to the other parts of your vehicle. Some of these problems include engine misfire, low fuel efficiency, decreased horsepower, and sluggish acceleration. Once you notice these problems in your road surfer, you certainly have a spark plug dilemma. Of course, you would not want to compromise your vehicle’s performance just because of a single defective spark plug. When one of your spark plugs fail, you should immediately replace it with a new one. They say that spark plugs give power to your engine. Let’s find out if the Denso Premium Iridium Power spark plug is powerful enough to meet our standards.

Denso Iridium Power spark plug features

  • OE replacement
  • 100% pre-fired
  • Composed of high-quality iridium for the electrode core material and platinum for the electrode tip material
  • Uses copper glass seal to bond the center electrode and the insulator
  • Heat range 16
  • Equipped with heavy-duty insulator
  • Features a five-rib design
  • Resistor plug type
  • Gasket seat style
  • Has a 14-millimeter tread size, 19-millimeter reach, and 1.1-millimeter gap size
  • Features a tapered cut, U-groove ground electrode
  • Has a removable terminal
  • Sold individually
  • Carries a one-year limited warranty from Denso

We tried the infamous Denso Premium Iridium Power spark plug on our 2003 Toyota Corolla, and here’s what we think:

The positives

  • The revolutionary 360 degrees laser welding used in the manufacturing process guaranteed that the Denso spark plug will stay durable even in the harshest driving conditions.
  • Its patented iridium alloy material proved to be six times harder and eight times stronger than the ordinary spark plugs we’ve tried because there were no signs of wear even if the Denso spark plug was subjected to extreme temperatures.
  • Its OE feature made it very easy for us to install the spark plug. No modifications were made. The installation was done in a jiffy.
  • The five-rib design of the spark plug helped in decreasing and eventually eliminating the incidents of flashovers and voltage loss.
  • The unique combination of the Iridium core and platinum tip, which was bonded together by the copper glass seal, significantly improved our Toyota Corolla’s engine performance and accelerating power.
  • The Denso spark plug also fostered a smoother idle during full stops and throttle response.
  • The gas mileage definitely increased–probably due to a more efficient fuel combustion.

The negatives

  • This particular variant of Denso spark plug is definitely more expensive than the ordinary spark plugs offered by Denso and the other brands.
  • Although our Corolla did not have any problem with this Denso spark plug, a few vehicles complained about their Denso spark plugs popping out of their engines.

The judgment

Equipping our Toyota Corolla with Denso’s Premium Iridium Power spark plug was absolutely a great idea. The iridium alloy material of the plugs did not falter even when the temperature reached 4000° Fahrenheit. Our Corolla consistently surfed various terrains for the past month, but not a single misfire incident was recorded. Horsepower and fuel efficiency increased significantly, and we had no problems in terms of revving up the vehicle even in the morning.

The popping out incidents involving some Denso spark plugs were really isolated, and it was just probably caused by a glitch in installation. The iridium spark plug from Denso may be more expensive than the other brands’. But as far as we are concerned, the Denso spark plug is a good replacement, and it is worth every buck.