Is this part covered by warranty?

Yes, this ACDelco Spark Plug includes a 24-month limited warranty covering defects in materials and workmanship. AutoBuffy also offers 30-day hassle-free returns if the part doesn't fit your vehicle.

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$2.95

AC Delco Gold Spark Plug R45S

Name: AC Delco Gold Spark Plug R45S
Brand: ACDelco
SKU: R45S
Price: 2.95 USD
Availability: InStock
Rating: 4.9 (12847 reviews)

Part # R45S

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AC Delco Gold Spark Plug R45S

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Vehicle Compatibility

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Specifications

Brand: ACDelco

Part Number: R45S

Part Type: Spark Plug

Condition: New

Qty Per Vehicle: 4

Center Electrode Core Material: Copper

Center Electrode Tip Material: Nickel Alloy

Grade Type: Regular

Ground Electrode Core Material: Nickel

Hex Type: Hex

Insulator Material: ES703

Length (In): 4.1 in

Resistor Type: Yes

Seat Type: Flat

Thread Diameter (In): 0.55 in

Thread Diameter (Mm): 14 mm

Washer Type: Crush

Washer(S) Included: Yes

Center Electrode Design: Standard

Faq - Answer 1: Yes, this interval depends on what type of spark plug your vehicle requires. Refer to your owner's manual or contact your vehicle's manufacturer for more information.

Faq - Answer 2: Yes, if it is the scheduled time for spark plug replacement.

Faq - Answer 3: Yes. Diesel engines require glow plugs because diesel engines operate differently than gas engines. ACDelco Professional Glow Plugs are specially designed to give diesel engines the heat they need for

Faq - Answer 4: Yes. When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification.

Faq - Answer 5: Not always, but you should inspect your spark plug wires for wear when replacing your spark plugs. Refer to your vehicle owner's manual or contact the manufacturer for more information.

Faq - Answer 6: Yes, pre-ignition can cause serious damage to your engine. Pre-ignition is the ignition of fuel before the actual spark occurs, which causes a rapid temperature rise in the combustion chamber that can

Faq - Answer 7: No, cleaning your old spark plugs is not recommended. Dirty, fouled spark plugs may also have broken or chipped insulator tips, worn electrodes, or worn or missing side wires. These conditions severel

Faq - Answer 8: Yes, ACDelco has marine spark plugs for many applications.

Faq - Question 1: Is there a recommended interval for changing my vehicle's spark plugs?

Faq - Question 2: Should I change all of my vehicle's spark plugs at the same time?

Faq - Question 3: Does a diesel engine require a different type of plug than a gas engine?

Faq - Question 4: Are ACDelco spark plugs pre-gapped?

Faq - Question 5: When I replace my spark plugs, should I also replace my spark plug wires?

Faq - Question 6: What is pre-ignition and can it damage my engine?

Faq - Question 7: Can I just clean my spark plugs instead of replacing them?

Faq - Question 8: Does ACDelco have marine spark plugs?

Features Benefits - Bullet 1: Black Onyx coating helps reduce corrosion

Features Benefits - Bullet 2: Copper core provides great heat transfer and helps maximize plug durability

Features Benefits - Bullet 3: Available for use in Marine applications

Features Benefits - Bullet 4: Some ACDelco Gold parts may have formerly appeared as ACDelco Professional

Features Benefits - Bullet 5: Premium aftermarket replacement part

Frequently Asked Questions

We're always here to help. If you can't find your answer, ask Rydon - our AI assistant will help you out.

What vehicles does this Spark Plug fit?

This ACDelco Spark Plug (Part #R45S) fits specific vehicles. Use the compatibility checker on this page to verify fitment for your vehicle.

Is this an OEM or aftermarket part?

This is a premium aftermarket Spark Plug by ACDelco, designed to meet or exceed OEM specifications with strict quality control standards.

What warranty is included?

This ACDelco Spark Plug is backed by a 24-month limited warranty covering defects in materials and workmanship from date of purchase.

How long does shipping take?

Free standard shipping on all orders. Most orders ship within 1-2 business days and arrive within 3-5 business days.

Can I return this if it does not fit?

30-day money-back guarantee. Return unused parts in original packaging for full refund.

Product Specifications

Brand

ACDelco

Part Type

Spark Plug

Center Electrode Tip Material

Nickel Alloy

Ground Electrode Core Material

Nickel

Part Number

R45S

Center Electrode Core Material

Copper

Grade Type

Regular

Hex Type

Hex

Center Electrode Core MaterialCopper

Center Electrode Tip MaterialNickel Alloy

Grade TypeRegular

Ground Electrode Core MaterialNickel

Hex TypeHex

Insulator MaterialES703

Length (In)4.1 in

Resistor TypeYes

Seat TypeFlat

Thread Diameter (In)0.55 in

Thread Diameter (Mm)14 mm

Washer TypeCrush

Washer(S) IncludedYes

Center Electrode DesignStandard

Faq - Answer 1Yes, this interval depends on what type of spark plug your vehicle requires. Refer to your owner's manual or contact your vehicle's manufacturer for more information.

Faq - Answer 2Yes, if it is the scheduled time for spark plug replacement.

Faq - Answer 3Yes. Diesel engines require glow plugs because diesel engines operate differently than gas engines. ACDelco Professional Glow Plugs are specially designed to give diesel engines the heat they need for

Faq - Answer 4Yes. When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification.

Faq - Answer 5Not always, but you should inspect your spark plug wires for wear when replacing your spark plugs. Refer to your vehicle owner's manual or contact the manufacturer for more information.

Faq - Answer 6Yes, pre-ignition can cause serious damage to your engine. Pre-ignition is the ignition of fuel before the actual spark occurs, which causes a rapid temperature rise in the combustion chamber that can

Faq - Answer 7No, cleaning your old spark plugs is not recommended. Dirty, fouled spark plugs may also have broken or chipped insulator tips, worn electrodes, or worn or missing side wires. These conditions severel

Faq - Answer 8Yes, ACDelco has marine spark plugs for many applications.

Faq - Question 1Is there a recommended interval for changing my vehicle's spark plugs?

Faq - Question 2Should I change all of my vehicle's spark plugs at the same time?

Faq - Question 3Does a diesel engine require a different type of plug than a gas engine?

Faq - Question 4Are ACDelco spark plugs pre-gapped?

Faq - Question 5When I replace my spark plugs, should I also replace my spark plug wires?

Faq - Question 6What is pre-ignition and can it damage my engine?

Faq - Question 7Can I just clean my spark plugs instead of replacing them?

Faq - Question 8Does ACDelco have marine spark plugs?

Features Benefits - Bullet 1Black Onyx coating helps reduce corrosion

Features Benefits - Bullet 2Copper core provides great heat transfer and helps maximize plug durability

Features Benefits - Bullet 3Available for use in Marine applications

Features Benefits - Bullet 4Some ACDelco Gold parts may have formerly appeared as ACDelco Professional

Features Benefits - Bullet 5Premium aftermarket replacement part

Features Benefits - Bullet 6Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models

Ground ConfigurationStandard

Ground Electrode Quantity1

Ground Electrode Tip DesignStandard

Height (In)1.1 in

Hex Size20.62 MM

Hex Size (In)13/16 in

Insulator Height62.97 MM

Manufacturer Heat Range5

Pre-Gap Size0.04 IN

Product DescriptionACDelco Gold (Professional) Conventional Spark Plugs are a high quality alternative to Original Equipment (OE) parts. These conventional spark plugs are designed for reliability and efficient performa

Reach0.37 IN

Signs Of Wear Troubleshooting - Section 1 - Bullet 1Your engine having trouble starting, hesitating, or cutting out

Signs Of Wear Troubleshooting - Section 1 - Bullet 2Engine misfire

Signs Of Wear Troubleshooting - Section 1 - Bullet 3Sluggish engine performance, loss of engine power, or decreased fuel economy

Signs Of Wear Troubleshooting - Section 1 - Bullet 4Lack of acceleration or loss of speed when driving uphill under load

Signs Of Wear Troubleshooting - Section 1 - Bullet 5Cracks in the upper or lower portion of the spark plug insulator

Signs Of Wear Troubleshooting - Section 1 - Bullet 6Chipped or broken insulator tips

Signs Of Wear Troubleshooting - Section 1 - HeaderSigns of wear for spark plugs include but are not limited to:

Weight (Lb)0.48 lb

Width (In)3.5 in

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Part # R45S

AC Delco Gold Spark Plug R45S

Brand ACDelcoCondition NewSpark PlugQty / vehicle 424-mo warranty

$1180

Dealer charges $25.96SAVE 55%— You save $14.16

In Stock10 or more available

QTY

Fast
Shipping

30-Day
Returns

24-Mo
Warranty

Expert
Support

OE REPLACEMENT

AC Delco Gold Spark Plug R45S

Part #:R45S

Spark Plug

$2^.95In Stock

Quantity:

In Stock10 or more available

Shipping calculated at checkout · Est. arrival Fri, Aug 14 to Fri, Aug 14

Ships To:

Key Features

OEM-Equivalent QualityMeets/exceeds factory specs

American BusinessMaryland since 1986

24-Month WarrantyLimited coverage on every part

Free Same Day ShippingWe ship all orders the same business day before cutoff

Product HighlightsBeta

Reading the catalog · checking interchanges · researching…

AC Delco Gold Spark Plug R45S

Part # R45S

Main Image

Click to expand

1 / 2

Special Offer

Buy 4, Get 5% Off

4 for $11.21•Save $0.59

$1180

Dealer charges $25.96SAVE 55%— You save $14.16

In Stock10 or more available

QTY

Fast
Shipping

30-Day
Returns

24-Mo
Warranty

Expert
Support

OE REPLACEMENT

AC Delco Gold Spark Plug R45S

Part #:R45S

Spark Plug

$2^.95In Stock

Quantity:

In Stock10 or more available

Shipping calculated at checkout · Est. arrival Fri, Aug 14 to Fri, Aug 14

Ships To:

Key Features

OEM-Equivalent QualityMeets/exceeds factory specs

American BusinessMaryland since 1986

24-Month WarrantyLimited coverage on every part

Free Same Day ShippingWe ship all orders the same business day before cutoff

WARNING: Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which are known to the State of California to cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts

Check if this fits your car first

AC Delco Gold Spark Plug R45S

AC Delco Gold Spark Plug R45S

Vehicle Compatibility

Specifications

Frequently Asked Questions

Product Specifications

AC Delco Gold Spark Plug R45S

AC Delco Gold Spark Plug R45S

Key Features

AC Delco Gold Spark Plug R45S

AC Delco Gold Spark Plug R45S

Key Features

About This Spark Plug

Key Features

Signs This Part Needs Replacement

ACDelco

Installation Guide

Tools Needed

Frequently Asked Questions