The Autolite to NGK cross reference chart helps you find equivalent spark plugs between the Autolite and NGK brands. It allows you to easily identify the right NGK replacement for your Autolite spark plug, ensuring compatibility and optimal engine performance.
Selecting the right spark plug for your vehicle can make a significant difference in engine performance, fuel efficiency, and overall longevity. Two of the most popular brands in the spark plug industry are Autolite and NGK. Whether you’re a car enthusiast or just someone looking to replace a worn-out spark plug, understanding the cross-reference between these two brands can help you find the best replacement part for your vehicle.
Autolite and NGK offer different spark plug models that serve various purposes, from standard ignition to high-performance applications. However, knowing which NGK spark plug corresponds to an Autolite part number is not always straightforward. This guide will break down everything you need to know about Autolite to NGK spark plug cross-references, providing you with a comprehensive understanding of how to make the best choice for your engine’s needs.
Contents
What is a Spark Plug Cross Reference?
A spark plug cross-reference chart is a tool that helps you identify the equivalent spark plug for a given brand. This can be especially helpful if the original spark plug is unavailable, discontinued, or you’re simply looking for alternatives from another trusted brand.
In the context of Autolite and NGK, a cross-reference chart enables you to find the NGK equivalent of an Autolite spark plug and vice versa. This is a valuable resource for car mechanics, enthusiasts, and DIYers who may prefer one brand over another, but need to find the best possible match based on their engine’s needs.
Autolite to NGK Spark Plug Cross Reference Chart
Here’s a detailed chart comparing Autolite spark plugs with their NGK counterparts. This chart will serve as a quick guide for replacing an Autolite spark plug with a suitable NGK model:
Autolite Part Number | NGK Equivalent |
---|---|
104 | TR5 |
105 | TR5 |
106 | TR5 |
124 | AR6FS |
127 | AR6FS |
143 | YR5 |
144 | YR5 |
145 | YR5 |
146 | YR5 |
156 | WR5 |
166 | WR5 |
203 | UR5 |
215 | B-6L |
2696 | AB-7 |
2697 | AB-6 |
2715 | D8HA |
AP26 | UR45GP |
AP45 | WR5IX |
Note: Always consult your vehicle’s manual or a professional mechanic to ensure compatibility before purchasing a replacement spark plug.
The Importance of Choosing the Right Spark Plug
Choosing the correct spark plug is important because the spark plug directly influences the combustion process in your engine. The spark plug provides the spark that ignites the air-fuel mixture in the engine’s cylinders. An improperly selected spark plug can result in poor engine performance, misfires, reduced fuel efficiency, and, in some cases, engine damage.
Here are a few reasons why choosing the right spark plug is essential:
- Engine Efficiency: The correct spark plug ensures proper ignition, leading to better engine performance and fuel economy.
- Longevity: Spark plugs made from advanced materials like iridium or platinum tend to last longer and withstand higher temperatures.
- Preventing Engine Damage: Using the wrong spark plug may cause incomplete combustion or misfires, leading to increased wear on engine components.
NGK vs. Autolite: A Brand Comparison
While both Autolite and NGK spark plug offer excellent spark plugs, there are some distinct differences between the two. Understanding these differences can help you decide which brand might be better suited for your vehicle.
NGK Spark Plugs: High-Performance and Durability
NGK is one of the leading manufacturers of spark plugs worldwide. Known for their precision, advanced materials, and long lifespan, NGK spark plugs are favored by car enthusiasts and professionals alike. Here are some key characteristics of NGK spark plugs:
- High-Performance Design: NGK spark plugs are designed with advanced technology, such as fine-wire electrodes, multi-ground electrodes, and coatings that resist wear.
- Longer Lifespan: NGK uses premium materials like iridium, platinum, and copper, which contribute to longer-lasting spark plugs.
- Variety of Applications: NGK offers spark plugs suitable for a range of vehicles, from everyday cars to high-performance engines used in motorsports.

Autolite Spark Plugs: Affordable and Reliable
Autolite is a well-known American brand that has been producing spark plugs for decades. Autolite offers a wide range of spark plugs, from standard models for everyday vehicles to specialized options for high-performance applications. Here’s what you should know about Autolite:
- Affordable Pricing: Autolite spark plugs are often more affordable than their NGK counterparts, making them a good choice for budget-conscious drivers.
- Reliability: Autolite spark plugs are known for their reliability and consistent performance.
- Standard Applications: Autolite spark plugs are a great option for everyday vehicles and light-duty applications.

Key Differences Between NGK and Autolite
Knowledge about the key differences between NGK and Autolite spark plugs can help you choose the best option for your vehicle. Both brands offer reliable products, but they differ in material composition, performance technologies, and longevity.
- Material: NGK is known for using advanced materials like iridium and platinum in their spark plugs, offering higher durability and performance. Autolite spark plugs, while reliable, often use more traditional materials, which may not last as long under extreme conditions.
- Technology: NGK incorporates cutting-edge technologies in its spark plugs, including multi-ground electrodes and advanced coatings to improve ignition efficiency and reduce wear. Autolite offers reliable spark plugs but doesn’t have the same level of technological innovation.
- Cost: Autolite spark plugs are generally more affordable compared to NGK, making them a good choice for those on a budget.
How to Use a Spark Plug Cross Reference Chart
Using a spark plug cross-reference chart is fairly simple. Here’s a step-by-step guide to help you navigate through the process:
- Find Your Existing Spark Plug Part Number: Every spark plug will have a part number stamped on the ceramic insulator or metal casing. This part number is unique to that specific spark plug and identifies its size, heat range, and material composition.
- Consult the Cross Reference Chart: Once you have your part number, look it up in the cross-reference chart. The chart will show you the equivalent spark plug from another brand, in this case, from Autolite to NGK or vice versa.
- Verify Compatibility: Before replacing your spark plug, double-check that the equivalent spark plug matches your engine’s requirements. You can find this information in your vehicle’s manual or consult a mechanic if you are unsure.
- Make the Purchase: Once you’ve confirmed compatibility, you can purchase the NGK or Autolite spark plug from an auto parts store, online retailer, or authorized dealer.
Frequently Asked Questions
Here are some FAQs about the Autolite to NGK cross reference chart –
1. Can I Use an NGK Spark Plug Instead of an Autolite Spark Plug?
Yes, you can use an NGK spark plug instead of an Autolite spark plug, as long as the NGK equivalent matches the required specifications for your engine. Always verify compatibility using a cross-reference chart.
2. Are NGK Spark Plugs Better Than Autolite Spark Plugs?
NGK spark plugs tend to offer longer life, higher performance, and more advanced technologies compared to Autolite. However, Autolite spark plugs are often more affordable and are suitable for standard vehicles.
3. How Often Should I Replace My Spark Plugs?
Spark plugs typically need replacement every 30,000 to 100,000 miles, depending on your vehicle’s specifications and the type of spark plugs used. Always follow the manufacturer’s recommendations.
4. Can Using the Wrong Spark Plug Damage My Engine?
Yes, using the wrong spark plug can cause engine misfires, reduced fuel efficiency, and potentially damage your engine. Always ensure you’re using the correct spark plug for your vehicle.
5. Where Can I Buy Autolite and NGK Spark Plugs?
Both Autolite and NGK spark plugs are widely available at automotive parts stores, online retailers, and authorized dealerships.
Conclusion
Knowing the Autolite to NGK spark plug cross-reference is important for anyone looking to maintain or replace their spark plugs. Both Autolite and NGK offer reliable products, but choosing the right one for your engine can make a big difference in performance, longevity, and fuel efficiency. By using a cross-reference chart, you can easily find the equivalent spark plug and ensure your vehicle runs smoothly.