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Spark Plug-Iridium IX NGK 3690

5.03 product ratings

Aftermarket.Direct (228)

95.2% positive feedback

Price:

$8.80

+ $16.99 shipping

Estimated delivery Mon, Nov 3 - Thu, Nov 6

Returns:

30 days returns. Seller pays for return shipping.

Condition:

New

Iridium IX provides outstanding acceleration, high fuel efficiency and durability. Tapered cut ground electrode provides improved starting, idling and throttle response. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

About this product

Product Identifiers

BrandNGK

Manufacturer Part Number3690

eBay Product ID (ePID)75218345

Product Key Features

California Prop 65 WarningNickel

Additional Product Features

NotesDescription--Iridium IX Spark Plug

Sub TypeSpark Plug

Part TypeSecondary Ignition

All listings for this product

Spark Plug NGK 3690 (Quantity of 1)

item 1 Spark Plug NGK 3690 (Quantity of 1)

NGK 3690 NGK Iridium IX Spark Plug For 06-09 Cadillac STS XLR

item 2 NGK 3690 NGK Iridium IX Spark Plug For 06-09 Cadillac STS XLR

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item 3 Iridium Spark Plug NGK 3690

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item 6 Iridium Spark Plug NGK 3690

NGK Spark Plug 3690 (EACH); Iridium IX TR7IX 14mm Copper Core, Tapered, HR 7

item 7 NGK Spark Plug 3690 (EACH); Iridium IX TR7IX 14mm Copper Core, Tapered, HR 7

Spark Plug-Iridium IX NGK 3690

item 8 Spark Plug-Iridium IX NGK 3690

Spark Plug-Iridium IX NGK 3690

item 9 Spark Plug-Iridium IX NGK 3690

Spark Plug-Iridium IX NGK 3690

item 10 Spark Plug-Iridium IX NGK 3690

+$6.30 shipping

Spark Plug-Iridium IX NGK 3690

item 11 Spark Plug-Iridium IX NGK 3690

+$6.30 shipping

Spark Plug-Iridium IX NGK 3690

item 12 Spark Plug-Iridium IX NGK 3690

Spark Plug-Iridium IX NGK 3690

item 13 Spark Plug-Iridium IX NGK 3690

Spark Plug-Iridium IX NGK 3690

item 14 Spark Plug-Iridium IX NGK 3690

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item 15 Iridium Spark Plug NGK 3690

Spark Plug-Iridium IX NGK 3690

item 16 Spark Plug-Iridium IX NGK 3690

Iridium Spark Plug NGK 3690

item 17 Iridium Spark Plug NGK 3690

Spark Plug-Iridium IX NGK 3690

item 18 Spark Plug-Iridium IX NGK 3690

Spark Plug-Iridium IX NGK 3690

item 19 Spark Plug-Iridium IX NGK 3690

item 20 Genuine NGK NGK Iridium IX Spark Plug 3690

+$9.99 shipping

NGK Iridium IX Spark Plug for Cadillac 3690

item 21 NGK Iridium IX Spark Plug for Cadillac 3690

NGK SPARKPLUGS 3690

item 22 NGK SPARKPLUGS 3690

NGK Spark Plug 3690 | High-Quality Auto Part, Universal Fit for Multiple Models

item 23 NGK Spark Plug 3690 | High-Quality Auto Part, Universal Fit for Multiple Models

NGK Spark Plug 3690 | High-Quality Auto Part, Universal Fit for Multiple Models

item 24 NGK Spark Plug 3690 | High-Quality Auto Part, Universal Fit for Multiple Models

Iridium Spark Plug NGK 3690

item 25 Iridium Spark Plug NGK 3690

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item 26 Spark Plug-Iridium IX NGK 3690

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item 27 NGK IX Iridium Spark Plug TR7IX 3690

NGK 3690 Iridium IX Spark Plug

item 28 NGK 3690 Iridium IX Spark Plug

For Cadillac STS 2006-2009 NGK 3690 Iridium IX Spark Plug

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item 31 Spark Plug-Iridium IX NGK 3690

+$21.35 shipping

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item 32 Spark Plug-Iridium IX NGK 3690

4 Pack Genuine Authentic NGK 3690 Spark Plugs Iridium IX TR7IX

item 33 4 Pack Genuine Authentic NGK 3690 Spark Plugs Iridium IX TR7IX

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item 34 Iridium Spark Plug NGK 3690

Spark Plug-Iridium IX NGK 3690

item 35 Spark Plug-Iridium IX NGK 3690

NGK 3690 IX Iridium Spark Plug Box of 4 (TR7IX)

item 36 NGK 3690 IX Iridium Spark Plug Box of 4 (TR7IX)

NGK T Dia 14 mm T Pitch 1.25 mm Gap 1.0 mm Iridium IX Spark Plug System TR7IX

item 37 NGK T Dia 14 mm T Pitch 1.25 mm Gap 1.0 mm Iridium IX Spark Plug System TR7IX

4 pc NGK Iridium IX Spark Plugs 3690 TR7IX 3690 TR7IX Tune Up Kit oq

item 38 4 pc NGK Iridium IX Spark Plugs 3690 TR7IX 3690 TR7IX Tune Up Kit oq

4 Pack NGK Iridium IX Spark Plugs 3690 TR7IX 3690 TR7IX Tune Up Kit

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item 41 4 Pack NGK Iridium IX Spark Plugs 3690 TR7IX 3690 TR7IX Tune Up Kit

NGK 3690 Spark Plug for Mercedes-Benz 190 Renault 21 25 Alpine V6

item 42 NGK 3690 Spark Plug for Mercedes-Benz 190 Renault 21 25 Alpine V6

+$19.99 shipping

4 pc Iridium IX Spark Plugs NGK 3690 TR7IX 3690 TR7IX Tune Up Kit oq

item 43 4 pc Iridium IX Spark Plugs NGK 3690 TR7IX 3690 TR7IX Tune Up Kit oq

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4 x Spark Plugs Made in Japan NGK Iridium IX 3690 TR7IX 3690 TR7IX Tune Up Kit

item 45 4 x Spark Plugs Made in Japan NGK Iridium IX 3690 TR7IX 3690 TR7IX Tune Up Kit

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item 46 Iridium Spark Plug NGK 3690

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item 47 NGK 3690 PLUG 4 Pack

Spark Plug-Iridium IX NGK 3690

item 48 Spark Plug-Iridium IX NGK 3690

NGK Spark Plugs Part # TR7IX Stock # 3690 (Box of 4)

item 49 NGK Spark Plugs Part # TR7IX Stock # 3690 (Box of 4)

6 Pack Genuine Authentic NGK 3690 Spark Plugs Iridium IX TR7IX

item 50 6 Pack Genuine Authentic NGK 3690 Spark Plugs Iridium IX TR7IX

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item 51 Iridium Spark Plug NGK 3690

NGK IX Iridium Spark Plug Box of 4 (TR7IX) 3690

item 52 NGK IX Iridium Spark Plug Box of 4 (TR7IX) 3690

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item 53 Spark Plug-Iridium IX NGK 3690

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item 54 NGK NGK Iridium IX Spark Plug 3690

NGK Spark Plug Fits Buick LUCERNE 2009-08; CADILLAC DTS 2009-08, STS 2009-06, XL

item 55 NGK Spark Plug Fits Buick LUCERNE 2009-08; CADILLAC DTS 2009-08, STS 2009-06, XL

NGK IX Iridium Spark Plug Box of 4 (TR7IX)

item 56 NGK IX Iridium Spark Plug Box of 4 (TR7IX)

NGK 3690 - Iridium IX™ Spark Plug

item 57 NGK 3690 - Iridium IX™ Spark Plug

Spark Plug-Iridium IX NGK 3690

item 58 Spark Plug-Iridium IX NGK 3690

Spark Plug-Iridium IX NGK 3690

item 59 Spark Plug-Iridium IX NGK 3690

listings for this product

Ratings and Reviews

5.0

3 product ratings

3 users rated this 5 out of 5 stars
0 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
0 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

by rstilts64ky
Apr 26, 2025
Works great
I was happy i chose these ... brought my truck back to life, i had ac delco and they didnt burn hot enough for my supercharger.Great value
Verified purchase: YesCondition: New
by kirbwayn
Mar 21, 2017
Vette,
Good Excellent for C-6 base corvette ,not sure about Zo6 or other race models !
Verified purchase: YesCondition: New

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