NAPA cross reference filters let you find the correct part number for your vehicle by matching your current filter or engine size to NAPA's catalog

NAPA (National Automobile Parts Association) maintains cross reference charts that connect filter part numbers across different manufacturers. If you have a filter from another brand — Fram, Motorcraft, Bosch, or an OEM part — you can look up its number in NAPA's system and find the equivalent NAPA Gold or NAPA ProSelect filter. This matters because filters from different makers fit the same engines, but you need the exact NAPA part number to order the right one.

The cross reference works in two directions: you can start with what you have (an old filter or a competitor's part number) and find the NAPA equivalent, or you can start with your vehicle's year, make, and model and let NAPA tell you which filter fits. Both routes lead to the same part, but which one you use depends on what information you have in front of you.

Key Takeaways

  • NAPA's online filter finder and in-store lookup tools cross reference part numbers from Fram, Motorcraft, Bosch, and other manufacturers to their NAPA equivalents.
  • You can search by your vehicle's year, make, and model, or by entering a competitor's part number directly into the cross reference system.
  • NAPA Gold and NAPA ProSelect are the two main filter lines; the cross reference will show you which NAPA line matches your vehicle and the filter type you need.
  • In-store staff can run a cross reference lookup in seconds if you bring the old filter or its part number, which is often faster than searching online yourself.
  • Cross reference charts are free to use on NAPA's website and in their stores; you do not pay extra for the lookup service.

How to use NAPA's online cross reference tool

Start at napa.com and look for the "Parts Finder" or "Filter Finder" section. Enter your vehicle's year, make, model, and engine size if you know it. NAPA will show you the correct filter part number for your car, along with the filter type (oil, air, cabin air, or transmission). This is the most straightforward route if you know your vehicle details.

If you already have a filter from another brand and want to find its NAPA match, look for the "Cross Reference" tool on the same page. Enter the competitor's part number — for example, a Fram part number like PH3593 — and NAPA will return the equivalent NAPA part number. The system shows you the filter type, dimensions, and which vehicles it fits, so you can confirm you have the right match before you order.

NAPA's website also lets you search by filter type alone if you know whether you need an oil filter, air filter, or cabin air filter but are unsure of the exact part. The system narrows the results by vehicle size and engine type, then shows you all compatible NAPA filters ranked by price and availability.

Using the cross reference at a NAPA store

Bring your old filter or its part number to any NAPA store, and a staff member can look it up in their system in under a minute. This is often faster than searching online, especially if you are not certain about your vehicle's engine size or year. The staff member will confirm the NAPA part number, show you the price, and tell you whether it is in stock.

If you do not have the old filter but know your vehicle details, the staff member can pull up your car in their system using the year, make, model, and engine size. They will show you the correct NAPA part number and may also show you the cross reference to other brands so you can see what else fits your engine. Many stores print out a cross reference sheet for you to take home.

NAPA stores also stock filters from other manufacturers, so if you prefer a Fram or Motorcraft filter, the staff can tell you the part number and price for that brand as well. The cross reference works both ways — you can compare prices and decide which brand you want, then order it on the spot.

What information you need to cross reference a filter

The easiest starting point is your vehicle's year, make, model, and engine size. You can find the engine size on your vehicle's door jamb label, in your owner's manual, or by searching your VIN (Vehicle Identification Number) on NAPA's website. With this information, NAPA can tell you the correct filter part number in seconds.

If you have the old filter itself, you can read the part number printed on the side. This number is usually stamped or printed in large text and includes letters and numbers — for example, PH3593 (Fram), FL-400 (Motorcraft), or 6050 (Bosch). Write down this number and enter it into NAPA's cross reference tool. The system will return the NAPA equivalent and confirm that it fits your vehicle.

If you have neither the old filter nor your vehicle details, you can still cross reference by filter type and engine size. Tell NAPA whether you need an oil filter, air filter, or cabin air filter, and provide your engine's displacement in liters or cubic inches. NAPA will narrow the results to filters that fit engines of that size, though you may see multiple options if your engine size is common across different vehicle models.

NAPA filter lines and what the cross reference shows

NAPA offers filters under two main brands: NAPA Gold and NAPA ProSelect. NAPA Gold is the premium line with higher filtration efficiency and longer service intervals. NAPA ProSelect is the value line, offering solid filtration at a lower price. When you cross reference a competitor's part number, NAPA will show you which of its own lines matches that filter's performance level.

For example, if you cross reference a Fram Extra Guard filter (a mid-range product), NAPA may show you a NAPA Gold equivalent because both offer similar filtration. If you cross reference a Fram Tough Guard (a budget filter), NAPA may show you a NAPA ProSelect match. The cross reference does not force you to buy a specific NAPA line — it shows you the equivalent — but the system is designed to match performance and price.

The cross reference also shows you the filter's dimensions, micron rating (how small the particles it catches are), and the recommended service interval. This information helps you understand whether the NAPA filter is truly equivalent to the competitor's product or whether it is a step up or down in quality.

Common reasons a cross reference lookup fails or shows multiple results

If you enter a part number and NAPA's system does not recognize it, the number may be from a regional or international manufacturer that NAPA does not stock. Some parts are sold only in specific countries or through specific retailers. In this case, you can search by your vehicle's year, make, and model instead, and NAPA will show you the correct filter for your engine regardless of what brand you previously used.

If the cross reference shows multiple NAPA part numbers for the same vehicle, the difference is usually in the filter type or performance level. For example, you might see one part number for a standard oil filter and another for a high-capacity oil filter that holds more oil and lasts longer. Check the filter's specifications — capacity, micron rating, and service interval — to confirm you are choosing the right one for your needs.

Sometimes a competitor's part number appears in NAPA's system but with a note that it is discontinued or no longer in stock. In this case, NAPA will suggest the closest current equivalent. This is common with older vehicles or filters that have been replaced by newer models. The suggested equivalent will fit your vehicle and offer similar or better performance than the original part.

Frequently Asked Questions

Can I use a NAPA filter if my car originally came with a Fram or Motorcraft filter?

Yes. NAPA's cross reference system ensures that the NAPA filter you order has the same dimensions, thread size, and performance rating as the original filter. As long as you use the correct NAPA part number for your vehicle, the filter will fit and work properly. Many vehicle owners switch between brands throughout their car's life without any issues.

What if the cross reference shows a NAPA part number that costs more than the competitor's filter?

NAPA Gold filters often cost more than budget alternatives because they offer longer service intervals and higher filtration efficiency. The cross reference shows you the equivalent product, not necessarily the cheapest option. If price is your priority, ask a NAPA staff member whether a lower-cost NAPA ProSelect filter would work for your vehicle, or compare the price of the competitor's filter at other retailers.

Do I need my vehicle's VIN to cross reference a filter?

No. Your VIN is helpful if you want NAPA to look up your exact vehicle in their system, but you can cross reference a filter using just the year, make, model, and engine size. If you do not know your engine size, you can find it on your door jamb label or in your owner's manual. NAPA staff can also look up your VIN for you in the store.

Can I cross reference a filter from a store brand like Walmart or AutoZone?

NAPA's cross reference system includes most national brands and store brands. Enter the part number from the Walmart or AutoZone filter, and NAPA will show you the equivalent. If the system does not recognize the part number, search by your vehicle's year, make, and model instead, and NAPA will show you the correct filter for your engine.

How often should I update my cross reference information if I own multiple vehicles?

You do not need to update anything. Each time you search, NAPA pulls current part numbers and availability from its database. If a filter is discontinued or replaced, the cross reference will show you the current equivalent. Keep a record of the correct NAPA part number for each of your vehicles so you can order quickly the next time you need a filter.