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Set of 2 Genuine NGK 3521 Spark Plug Iridium IX CR9EIX - Picture 1 of 3
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Spark Plug-Iridium IX NGK 3521

4.8340 product ratings
byard63029 (3668)
99.3% positive feedback
Price:
US $18.15
ApproximatelyAU $28.06
Returns:
No returns, but backed by eBay Money Back Guarantee.
Condition:
Brand New
2 new plugs Free shipping MPN 3521 OEM # 3521 CR9EIX Other # 3521-2K 3521 This set of two genuine NGK spark plugs is a must-have for any owner. Made with high-quality iridium material, these spark plugs are designed to ensure optimal ignition and fuel efficiency. The standard configuration and OE/OEM part numbers make them a perfect fit for your vehicle. NGK is a trusted brand known for its durable and reliable spark plugs. These spark plugs are no exception, weighing only.3 lbs. and designed to work with gasoline fuel. The interchange part number, NGK 3521 CR9EIX, ensures that you are getting a genuine product. Buy these spark plugs today and experience the difference in your vehicle's performance.

About this product

Product Identifiers

BrandNGK
Manufacturer Part Number3521
eBay Product ID (ePID)112760387

Additional Product Features

NotesDescription--Iridium IX Spark Plug
Sub TypeSpark Plug
Part TypeHardware, Fasteners and Fittings

All listings for this product

Buy It Now
New
NGK Spark Plug Iridium 3521 38-0188 CR9EIX 2-CR9EIX NGK ngk3521
item 1 NGK Spark Plug Iridium 3521 38-0188 CR9EIX 2-CR9EIX NGK ngk3521
AU $28.55
Free postage
item 2 New NGK Spark Plug 3521 / CR9EIX bm5
AU $17.50
+AU $21.94 postage
NGK Spark Plug 3521
item 3 NGK Spark Plug 3521
AU $17.52
+AU $21.94 postage
NGK Spark Plug Pre-Gap 0.03 Iridium IX For Aprilia RSV4 Factory
item 4 NGK Spark Plug Pre-Gap 0.03 Iridium IX For Aprilia RSV4 Factory
AU $17.53
+AU $21.94 postage
NGK Spark Plug Pre-Gap 0.03 Iridium IX For Aprilia RSV4 Factory
item 5 NGK Spark Plug Pre-Gap 0.03 Iridium IX For Aprilia RSV4 Factory
AU $17.53
+AU $21.94 postage
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item 6 Spark Plug NGK 1006 (1 Spark Plug Only)
AU $18.25
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item 7 Spark Plug-Iridium IX NGK 3521
AU $20.02
+AU $22.01 postage
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item 8 Iridium Spark Plug NGK 3521
AU $20.60
+AU $22.02 postage
Iridium Spark Plug NGK 3521
item 9 Iridium Spark Plug NGK 3521
AU $21.07
+AU $22.04 postage
NGK Spark Plug 3521; Iridium IX CR9EIX 10.00mm Gasket
item 10 NGK Spark Plug 3521; Iridium IX CR9EIX 10.00mm Gasket
AU $21.55
+AU $22.06 postage
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item 11 Iridium Spark Plug NGK 3521
AU $21.84
+AU $22.06 postage
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item 12 NGK Iridium-IX Spark Plug CR9EIX #3521 A29
AU $22.11
+AU $22.07 postage
CR9EIX Ngk Spark Plug Ea
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item 13 CR9EIX Ngk Spark Plug Ea
AU $22.47
+AU $22.09 postage
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item 14 NGK Iridium IX Spark Plug CR9EIX (3521)
AU $25.68
+AU $19.05 postage
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item 15 NGK Spark Plugs 3521 Spark Plug
AU $22.74
+AU $22.09 postage
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item 16 1 Pack NGK Iridium IX 3521 Spark Plugs CR9EIX ps
AU $23.42
+AU $22.11 postage
NGK Iridium-IX Spark Plug CR9EIX #3521 Aprilia Scarabeo 100 4T 2007-2009
item 17 NGK Iridium-IX Spark Plug CR9EIX #3521 Aprilia Scarabeo 100 4T 2007-2009
AU $23.47
+AU $22.11 postage
NGK Iridium-IX Spark Plug CR9EIX #3521 Aprilia Scarabeo 100 4T 2007-2009
item 18 NGK Iridium-IX Spark Plug CR9EIX #3521 Aprilia Scarabeo 100 4T 2007-2009
AU $23.47
+AU $22.11 postage
NGK Iridium-IX Spark Plug CR9EIX #3521 Aprilia Scarabeo 100 4T 2007-2009
item 19 NGK Iridium-IX Spark Plug CR9EIX #3521 Aprilia Scarabeo 100 4T 2007-2009
AU $23.47
+AU $22.11 postage
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item 20 Spark Plug-Iridium IX NGK 3521
AU $23.57
+AU $22.11 postage
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item 21 NGK SPARK PLUGS IRIDIUM IX SPARK PLUG 3521 CR9EIX HARLEY-DAVIDSON ZR SR TE TC SV
AU $23.69
+AU $22.13 postage
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item 22 Spark Plug-Iridium IX NGK 3521
AU $17.81
+AU $28.98 postage
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item 23 NGK - Iridium IX Spark Plug (CR9EIX) 3521
AU $24.74
+AU $22.16 postage
Spark Plug-Iridium IX NGK 3521
item 24 Spark Plug-Iridium IX NGK 3521
AU $16.99
+AU $30.94 postage
Spark Plug-Iridium IX NGK 3521
item 25 Spark Plug-Iridium IX NGK 3521
AU $16.99
+AU $30.94 postage
NGK CR9EIX Iridium IX Spark Plug 10mm Thread 3/4" Reach for RZR 900 1000 3521
item 26 NGK CR9EIX Iridium IX Spark Plug 10mm Thread 3/4" Reach for RZR 900 1000 3521
AU $17.60
+AU $30.43 postage
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item 27 NGK 3521 NGK Iridium IX Spark Plug
AU $27.41
+AU $22.23 postage
4 Pack Spark Plugs - Iridium IX NGK 3521 CR9EIX
Last one
item 28 4 Pack Spark Plugs - Iridium IX NGK 3521 CR9EIX
AU $27.64
+AU $22.24 postage
NGK CR9EIX Iridium IX Spark Plug 10mm Thread 3/4" Reach for RZR 900 1000 3521
item 29 NGK CR9EIX Iridium IX Spark Plug 10mm Thread 3/4" Reach for RZR 900 1000 3521
AU $17.60
+AU $32.48 postage
NGK SPARK PLUGS - 3521 - Iridium IX Spark Plug ? CR9EIX for Honda Africa Twin DC
item 30 NGK SPARK PLUGS - 3521 - Iridium IX Spark Plug ? CR9EIX for Honda Africa Twin DC
AU $28.83
+AU $22.28 postage
SET OF (2) NGK SPARK PLUG CR9EIX (3521)
item 31 SET OF (2) NGK SPARK PLUG CR9EIX (3521)
AU $28.91
+AU $22.28 postage
New NGK Spark Plug-Iridium IX 3521 CR9EIX
item 32 New NGK Spark Plug-Iridium IX 3521 CR9EIX
AU $24.56
+AU $26.85 postage
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item 33 Iridium Spark Plug NGK 3521
AU $29.15
+AU $22.28 postage
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item 34 Spark Plug-Iridium IX NGK 3521
AU $29.40
+AU $22.30 postage
NGK Iridium IX Spark Plug - CR9EIX (Replaces CR9E)
item 35 NGK Iridium IX Spark Plug - CR9EIX (Replaces CR9E)
AU $19.83
+AU $32.13 postage
Set of 2 Genuine NGK 3521 Spark Plug Iridium IX CR9EIX
item 36 Set of 2 Genuine NGK 3521 Spark Plug Iridium IX CR9EIX
AU $28.06
+AU $23.95 postage
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item 37 NGK Spark Plugs Iridium IX Spark Plug CR9EIX 3521 - High Performance
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item 38 Ngk Spark Plug P N 3521
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item 39 One New NGK Iridium Resistor Spark Plug 3521
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item 40 NGK 3521 Iridium Sparkplug CR9EIX
AU $30.83
+AU $22.33 postage
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item 41 NGK 3521 CR9EIX IRIDIUM IX SPARK PLUG
AU $30.85
+AU $22.33 postage
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item 42 Iridium Spark Plug NGK 3521
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+AU $26.97 postage
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item 43 Spark Plug-Iridium IX NGK 3521
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10-17 Yamaha YZ450F WR450F YZ WR 450F NGK Laser Iridium Spark Plug Part# CR9EIX
item 44 10-17 Yamaha YZ450F WR450F YZ WR 450F NGK Laser Iridium Spark Plug Part# CR9EIX
AU $33.81
+AU $22.41 postage
Iridium IX Spark Plug CR9EIX NGK 3521
item 45 Iridium IX Spark Plug CR9EIX NGK 3521
AU $33.93
+AU $22.41 postage
NGK Iridium-IX Spark Plug CR9EIX #3521 for Kawasaki/Yamaha
item 46 NGK Iridium-IX Spark Plug CR9EIX #3521 for Kawasaki/Yamaha
AU $34.52
+AU $22.43 postage
NGK Iridium-IX Spark Plug CR9EIX #3521 for Polaris/Cannondale
item 47 NGK Iridium-IX Spark Plug CR9EIX #3521 for Polaris/Cannondale
AU $34.52
+AU $22.43 postage
NGK Iridium-IX Spark Plug CR9EIX #3521 for Harley-Davidson
item 48 NGK Iridium-IX Spark Plug CR9EIX #3521 for Harley-Davidson
AU $34.52
+AU $22.43 postage
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item 49 Iridium Spark Plug NGK 3521
AU $34.91
+AU $22.45 postage
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item 50 Spark Plug-Iridium IX NGK 3521
AU $35.56
+AU $22.47 postage
Spark Plug-Iridium IX NGK 3521
item 51 Spark Plug-Iridium IX NGK 3521
AU $14.37
+AU $44.13 postage
Spark Plug-Iridium IX NGK 3521
item 52 Spark Plug-Iridium IX NGK 3521
AU $36.68
+AU $22.50 postage
*1* CR9EIX Spark Plug NGK 3521 Iridium IX Motorcycle Auto Truck ATV UTV Water
item 53 *1* CR9EIX Spark Plug NGK 3521 Iridium IX Motorcycle Auto Truck ATV UTV Water
AU $15.29
+AU $45.02 postage
NGK SPARK PLUGS 3521 Iridium IX Spark Plug - CR9EIX
item 54 NGK SPARK PLUGS 3521 Iridium IX Spark Plug - CR9EIX
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NGK Laser Iridium Spark Plugs CR9EIX Polaris RZR XP900 XP1000 XP 900 1000 Pair
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item 55 NGK Laser Iridium Spark Plugs CR9EIX Polaris RZR XP900 XP1000 XP 900 1000 Pair
AU $38.16
+AU $22.55 postage
Ngk Spark Plug #3521/04 3521
item 56 Ngk Spark Plug #3521/04 3521
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item 57 Spark Plug #3521/04
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NGK Laser Iridium Spark Plugs CR9EIX Polaris RZR XP900 XP1000 XP 900 1000 Pair
Last one
item 58 NGK Laser Iridium Spark Plugs CR9EIX Polaris RZR XP900 XP1000 XP 900 1000 Pair
AU $39.10
+AU $22.57 postage
Set of 4 Genuine NGK 3521 Spark Plug Iridium IX CR9EIX
item 59 Set of 4 Genuine NGK 3521 Spark Plug Iridium IX CR9EIX
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+AU $22.62 postage
listings for this product

Ratings and reviews

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4.8
40 product ratings
  • 36 users rated this 5 out of 5 stars
  • 3 users rated this 4 out of 5 stars
  • 0 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 1 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 20 reviews
  • by meye_deny
    31 Jul, 2019

    It's a good plug

    I use these on my bike I have never had a problem with a plug failing it is my second set last time they changed was 3 years ago and and they were working fine when I pulled them so all-in-all I think it's a great plug

    Verified purchase: YesCondition: New

  • by smoeun123
    30 Apr, 2020

    Brand new plugs!

    Perfect!!!

    Verified purchase: YesCondition: New

  • by hayapower!
    18 Oct, 2018

    Runs good

    Replaced my standard NGK that suffered an early low end misfire issue. Replaced them with NGK IX and running well again. Would have been fine with the OE plugs as the cure, but will see if the IX give better life...

    Verified purchase: YesCondition: New

  • by thomareow_0
    05 May, 2020

    Woke my bike up

    Wants teens into this plug it felt like I had a whole nother bike great plugs

    Verified purchase: YesCondition: New

  • by tiskinne_3
    05 May, 2025

    Fitment, quality and performance seem g...

    Fitment, quality and performance seem good.

    Verified purchase: YesCondition: New

  • by autosales5511
    27 Dec, 2019

    Spark plugs for Polaris

    Work great

    Verified purchase: YesCondition: New

  • by scottwagner509
    30 Jun, 2016

    Good product

    New, clean, arrived fast. Gapped easily and improved performance.

    Verified purchase: YesCondition: New

  • by faygo87
    20 Dec, 2017

    Wrong plugs sent

    You sent Ngk iridium but you sent the wrong tip. Picture is right but the ones sent were wrong. Ruined my whole day.

    Verified purchase: YesCondition: New

  • by hayabusafondeur
    02 Jul, 2020

    Great spark

    Perfect fit and performance!

    Verified purchase: YesCondition: New

  • by benjamiberkele-0
    18 Feb, 2021

    Got my bike roaring again thank u!

    Verified purchase: YesCondition: New

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