Enter a spark plug part number to look up cross-references recorded in our catalog for NGK, DENSO, Bosch, Champion, Autolite, and E3. Follow available product links to compare specifications, pricing, and vehicle fitment. A cross-reference is a helpful starting point—not a guarantee that another plug is approved for your engine. Confirm your vehicle or engine manufacturer's specified plug before choosing a replacement.
Manufacturers use different part-number systems. A cross-reference associates one manufacturer's number with another number that may be used when considering a replacement. The lookup above displays relationships recorded in our catalog; it does not calculate a new match from measurements or certify vehicle fitment.
Check the vehicle or engine manufacturer's recommendation, then review the candidate plug's published specifications, including:
No. A recorded cross-reference can help identify a candidate, but it does not establish that every critical specification matches or that the plug is approved for every vehicle using the original part number. Review both product specifications and the manufacturer's application guidance. Use Shop by Vehicle to check the available vehicle-fitment information before purchase; where engine-level fitment cannot be confirmed, keep the existing site warning.
Always follow your vehicle or engine manufacturer's specified plug, gap, and torque requirements. If information conflicts, consult the manufacturer's documentation or a qualified technician.
NGK uses its own part-number conventions for plug design and applications. Enter an NGK number above to see recorded cross-references, if available, and review the linked products before choosing a substitute. Browse NGK spark plugs.
DENSO part numbers use a different system from NGK and other brands. Search a DENSO number above to see available catalog cross-references and compare the product details. Browse DENSO spark plugs.
Search a Champion number to find any recorded catalog cross-references. Check the candidate's specifications and your application before installing a different brand. Browse Champion spark plugs.
Search a Bosch number to explore recorded cross-references to products in the catalog. Confirm the relevant physical specifications and recommended application. Browse Bosch spark plugs.
Search an Autolite number for available cross-references and compare products individually. Do not infer another brand's heat range from the digits in an Autolite part number. Browse Autolite spark plugs.
Search an E3 number for recorded cross-references to other listed plugs. E3's electrode design differs from conventional designs, so verify the exact application rather than assuming designs are interchangeable. Browse E3 spark plugs.
Enter your plug's part number in the lookup tool above. It displays any recorded cross-references in our catalog. Open a linked product to compare its specifications and vehicle-fitment information before choosing it.
No. A catalog cross-reference is a starting point, not a fitment guarantee. Confirm the replacement against your vehicle or engine manufacturer's recommended part and specifications, and check the vehicle and engine details.
No. The tool displays recorded cross-reference relationships; it does not verify every physical specification or classify matches as “direct” or “close.” Compare the products and the manufacturer's application guidance.
It may help you identify a candidate made with a different electrode material. Longer-life materials are not automatically suitable for every engine. Check the manufacturer's recommended specifications and application before changing plug type.
Each manufacturer has its own numbering conventions for features and applications. A catalog cross-reference can help you investigate another manufacturer's number, but the numbers alone do not establish an approved replacement.
No. Material or price does not override the required dimensions, heat characteristics, and application. Select a plug that meets your engine manufacturer's requirements.
Some catalog numbers have no recorded cross-reference or no linked product here. Try the vehicle finder for available fitment information, or contact our spark plug specialists for help checking your application.
Not sure which part number to search? Try another way to find a spark plug for your vehicle or application.