DENSO
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DENSO 4709  
$5.99
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$0.00
Core
$5.99
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DENSO 4709 Specifications
Center Electrode Core MaterialCopper
Center Electrode Tip MaterialIridium
Gap Size1.0 (MM)
Ground ConfigurationTwin-Tip
Ground Electrode Core MaterialNickel
Ground Electrode Quantity1
Ground Electrode Tip DesignPlatinum Twin-Tip
Hex Size20.6 (MM)
Manufacturer Heat Range20
Reach19.00 (MM)
Resistance5000 (oh)
Seat TypeFlat
Thread Diameter14.00 (MM)
Iridium TT; Solid Terminal
Features & Benefits:
  • LIFESPAN / DURABILITY | Iridium alloy is 6X harder and 8X stronger than Platinum
    • Iridium with Rhodium Center Electrode -- DENSO uses the highest concentration of Iridium of any spark plug and outperforms in the most severe engine temperatures, resisting oxidation and voltage wear for over 100,000 miles.
    • Platinum Ground Electrode -- extends the life of the plug by resisting gap erosion.
    • Patented 360-Degree Laser Welding -- creates the highest quality bond for structural support of the center electrode.
  • PERFORMANCE / IGNITABILITY
    • 0.4 mm Fine Wire Iridium Center Electrode -- achieves higher ignitability and requires lower spark voltage to enable high-response driving with fewer misfires. As a result, acceleration improves in comparison with normal plugs.
  • EFFICIENCY / FUEL ECONOMY
    • Twin Tips -- allow the spark plug to create the fastest and largest spark concentration and explosion, which translates into more power and superior fuel economy.
Standard Tip (Left) vs. DENSO Twin-Tip (Right)
Spark Growth
Animated comparison of spark size and speed
Which DENSO Spark Plug Is Right For You?

Material / Series Lifespan / Durability Performance / Ignitability Efficiency / Fuel Economy
Copper / Nickel U-Groove
U-Groove
Platinum Twin Tip
Platinum Twin-Tip
★★★★ ★★ ★★
Double Platinum
Double Platinum
★★★★★ ★★ ★★
Iridium Twin Tip
Iridium Twin-Tip
★★★★★★ ★★★★ ★★★
Iridium Power
Iridium Power
★★★★ ★★★★★ ★★★
Iridium Long Life
Iridium Long Life
★★★★★★ ★★★★ ★★
Videos

Why Choose DENSO Iridium TT?

How To Replace DENSO Spark Plugs

OEM / Interchange Numbers: 0000181690, 000018B601, 0031594603, 0948200285, 0948200299, 0948200409, 0948200421, 101000001AC, 101000005AB, 101000006AF, 101000009AA, 101000021AA, 101000026AA, 101000027AA, 101000036AA, 101000036AB, 13465410, 13675280, 169018110, 1881111061, 1882211091, 191905450A, 19250976, 19310643, 22401AA120, 22401AA290, 22401KA050, 22401P8316, 2707460, 2714090, 395418110, 4106117, 5613522, 5613940, 596162, 7568900, 8251091990, 8350076, 83501511, 88901010, 8941205620, 8942172320, 9807956146, 9807956146S, 9807956155, 99917015690, 99917015890, 99917018990, 9991701899A, FE8218110, M05269897, M05269899, MS851029, MS851188, MS851233, MS851238, MS851292, MS851302, MS851413, MS851418, MS851433, MS851551, MS851555, N01781133, N01781178, XP63, ZVP121085C, ZVP121087S

Warranty Information:
No Warranty