15% OFF ORDERS $35+ | 20% OFF $100+ | ONLINE ONLY
USE CODE
FRESHCAR
*
Exclusions apply.
Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Advance Rewards
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product thumb
Product main large
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. 940
Warranty Details (30 DAY REPLACEMENT IF DEFECTIVE)
Copper Plus Spark Plug RDZ19H delivers dependable performance and durability, making it an ideal OE-type replacement for your vehicle. Featuring a copper core center electrode, it ensures precise heat control for extended lifespan and consistent wear. The nickel-tipped center and ground electrodes enhance conductivity while resisting fouling, ensuring reliable ignition under various conditions. Built to ISO and SAE Standards, this spark plug offers proven performance and superior corrosion resistance, making it a trustworthy choice for long-term use. Its tapered seat design and integrated resistor further optimize functionality, providing smooth operation and compatibility with a wide range of vehicles.

Product Features:
  • Copper Plus - Dependable Performance and Durability
  • OE type replacement plug
  • Resists fouling
  • Copper core center electrode allows for accurate control of heat range for longer life
  • Superior corrosion resistance
  • Built to ISO and SAE standards for proven performance
Specifications
Center Electrode Design:
Standard

Center Electrode Diameter (Inch):
0.052 in

Center Electrode Tip Material:
Nickel

Core Nose Length:
0.660 in

Electrical Terminal Type:
Non-Removable Nut

Gap Style:
J Gap

Grade Type:
Standard Replacement

Ground Electrode Core Material:
Nickel

Ground Electrode Material:
Nickel Copper Alloy

Ground Electrode Quantity:
1

Ground Electrode Tip Design:
J Gap

Ground Electrode Tip Material:
Nickel

Hex Size:
0.625 in

Hex Type:
Hex

Indexed:
No

Installed Height (Inch):
1.45 in

Insulator Height:
0.03 in

Manufacturer Heat Range:
19

Part Description:
Spark Plug

Pre-Gap Size:
0.025 in

Reach:
0.5 in

Resistor Type:
Yes

Seat Type:
Tapered

Thread Diameter:
0.394 in

Washer(s) Included:
No
Loading...
Loading...Loading...Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2026 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®