Wix Fuel Filter Cross Reference: The Complete Guide to Finding Exact Equivalents​

2026-02-21

Finding the exact replacement fuel filter for your vehicle, especially when looking for alternatives to the brand currently installed, is a critical task. For owners, mechanics, and fleet managers using or considering Wix filters, a reliable cross-reference is essential. The central conclusion is that Wix fuel filters are extensively cross-referenced with virtually every major filter brand and OEM part number on the market. You can confidently find a Wix equivalent for most applications, and conversely, find alternatives to a Wix number using trusted methods. This guide provides the definitive, step-by-step process for accurate Wix fuel filter cross-referencing, ensuring you get the correct part for optimal engine performance and protection.

​Understanding Fuel Filter Cross-Referencing​

Cross-referencing is the process of matching a part number from one manufacturer to an identical or functionally equivalent part from another manufacturer. In the context of fuel filters, it means finding a filter that:

  • Fits the same vehicle or equipment model (year, make, engine).
  • Has identical physical dimensions, thread sizes, and port configurations.
  • Meets or exceeds the original filtration performance specifications (micron rating, efficiency, capacity).

For Wix filters, this process is highly systematic. Wix, part of the global filtration leader Mann+Hummel, manufactures filters to precise OEM specifications. Their part numbering and application data are among the most comprehensive in the industry, making cross-referencing a straightforward task when you use the right tools.

​The Wix Numbering System and "Wix-Plus" Cross-Reference​

Wix has its own internal part numbering system. A typical Wix fuel filter number looks like ​**33517​ or ​24705**. The key to cross-referencing is understanding that each of these numbers is tied to a vast database of equivalent numbers. Historically, Wix catalogs featured a "Wix-Plus" section or column. This wasn't a separate product line, but a direct cross-reference system within their catalog. Next to the Wix number, they would list the primary competitor's part number that it directly replaced. For example, a listing might show:

  • ​Wix Number:​​ 33517
  • ​Application:​​ 2005 Ford F-150 with 5.4L V8
  • ​Wix-Plus (AC-Delco):​​ GF481
  • ​Wix-Plus (Fram):​​ G3721
  • ​Wix-Plus (Motorcraft):​​ FD-4615

While modern research has moved online, this principle remains the foundation. A single Wix part number correlates to multiple competitor numbers.

​How to Cross-Reference a Wix Fuel Filter: Step-by-Step Methods​

You can start with either a ​competitor's part number​ (to find the Wix equivalent) or with a ​Wix part number​ (to find a competitor's equivalent).

​Method 1: Using Official Wix Resources (Most Reliable)​​

  1. ​Wix Website / Part Finder:​​ The most authoritative source. Navigate to the Wix filters website. Use their "Part Finder" or "Product Search" tool.
    • If you have a Wix number: Enter it directly. The product page will list detailed specifications and, crucially, the official OEM part numbers it replaces.
    • If you have a vehicle: Enter your vehicle's year, make, model, and engine. The results will show the correct Wix part number(s). From there, you can see the OEM/competitive equivalents.
  2. ​Wix Official Catalogs (Digital or Print):​​ While less common now, official catalogs from Wix distributors contain exhaustive cross-reference tables. These are considered the gold standard for accuracy.

​Method 2: Using Major Retailer & Distributor Websites​

Large automotive parts retailers and distributors have built robust cross-reference databases into their websites. These are extremely practical for end-users.

  • ​Process:​​ Go to a site like RockAuto, NAPA, Summit Racing, or a major local distributor. Enter the part number you know (Wix or another brand) into the search bar. Often, the search results page will automatically show "Replaces" or "Interchanges" listing several other brand part numbers. You can also use their vehicle search to find all compatible brands side-by-side.

​Method 3: Using Third-Party Cross-Reference Databases​

Dedicated parts lookup sites exist. Sites like ​FilterCrossReference.com​ or parts databases within shop management software (like ALLDATA, Mitchell1) offer powerful interchange lookup tools. Simply input your known number to generate a list of matches across dozens of brands, including Wix.

​Common Applications for Cross-Referencing Wix Filters​

  • ​During Routine Maintenance:​​ Your vehicle's manual or a previous invoice specifies a Fram, Motorcraft, or Bosch filter. You want to use a Wix filter. Cross-reference the OEM number to find the correct Wix part.
  • ​Emergency or Availability Situations:​​ Your preferred Wix filter is out of stock locally. You have the Wix number. Cross-reference it to see if a NAPA (Gold), Carquest, or Purolator filter on the shelf is an exact match.
  • ​Upgrading or Standardizing a Fleet:​​ A fleet manager standardizes on Wix for all fluid filters. For each piece of equipment, they must cross-reference the existing OEM filter number to the corresponding Wix number for bulk purchase.
  • ​Verifying Correctness:​​ You receive a box with only a Wix number. To double-check it fits your specific machine, cross-reference the Wix number back to the OEM numbers, then verify one of those OEM numbers against your equipment's manual.

​Critical Parameters to Confirm Beyond the Part Number​

A cross-reference list gives you candidate numbers, but you must verify key physical and performance specs. Never install a filter based on a cross-reference alone without visual or spec confirmation.

  1. ​Thread Size and Pitch:​​ Inline fuel filters must have matching male/female threads. Diesel fuel/water separators have specific bowl thread sizes.
  2. ​Port Size and Type:​​ The diameter of the inlet/outlet ports (e.g., 5/16", 3/8", 1/2") and whether they are barbed, O-ring, or flare fittings.
  3. ​Overall Dimensions:​​ Length, diameter, and shape must fit the mounting bracket or available space.
  4. ​Micron Rating and Efficiency:​​ This is the most critical performance metric. A 10-micron filter is not a direct replacement for a 5-micron filter, even if it screws in. Match or improve the rating.
  5. ​Pressure Rating:​​ Especially for diesel applications and fuel injection systems, the filter must be rated for the system's operating pressure.
  6. ​Presence of a Water Drain Valve:​​ For diesel applications, if the original has a drain valve, the replacement should have one.

​Wix to Major OEM & Brand Cross-Reference Examples​

Here are illustrative examples showing how one Wix filter corresponds to many brands. (Note: Always verify for your specific application).

  • ​Wix 33517 (Common Inline Filter):​​

    • ​ACDelco:​​ GF481
    • ​Baldwin:​​ BF7633
    • ​Fram:​​ G3721
    • ​Hastings:​​ GF-210
    • ​Motorcraft:​​ FD-4615
    • ​NAPA Gold (Wix):​​ 33517
    • ​Purolator:​​ F20011

  • ​Wix 24705 (Common Spin-On Diesel Filter/Water Separator):​​

    • ​Baldwin:​​ BF-1275
    • ​CAT (Caterpillar):​​ 1R-1801
    • ​Donaldson:​​ P550032
    • ​Fleetguard:​​ FS-1006
    • ​Luber-finer:​​ PFF-9002
    • ​Motorcraft:​​ FD-4626
    • ​Racor:​​ R25S

​Cross-Referencing for Heavy-Duty and Specialty Applications​

The process is identical for heavy-duty trucks, agricultural, and construction equipment but demands extra diligence. A single piece of heavy machinery may have multiple fuel filters (primary, secondary, transfer pump). Wix filters under the ​​"Wix Heavy Duty"​​ line have extensive cross-references to major OEMs like Cummins (Fleetguard), Donaldson, Caterpillar, and Baldwin. Always use the equipment's serial number (SN) or detailed engine model when possible, as chassis year/make/model is less precise in the heavy-duty world.

​The Importance of Genuine, Accurate Cross-Reference Data​

Using an incorrect filter, even one that seems to fit, can lead to:

  • ​Fuel Leaks:​​ From mismatched threads or seals.
  • ​Restricted Fuel Flow:​​ From a filter with insufficient capacity or incorrect porosity, causing engine starvation.
  • ​Inadequate Filtration:​​ Allowing contaminants to damage expensive fuel injectors and pumps.
  • ​Voided Warranty:​​ Using a non-OEM equivalent that fails and causes damage may complicate warranty claims.

Trusted cross-reference data from official or major distributor sources minimizes these risks. It translates the universal specifications of a vehicle's need into the specific part numbers of various manufacturers.

​Conclusion: Mastering the Interchange​

The ability to perform a reliable ​Wix fuel filter cross reference​ is a fundamental skill for anyone responsible for vehicle maintenance. By starting with authoritative sources like the Wix website or major distributor catalogs, and always confirming critical physical and performance specifications, you ensure seamless parts interchangeability. Whether you are converting to Wix from another brand, finding an emergency alternative, or managing a diverse fleet, this systematic approach guarantees you select the correct filter. The correct fuel filter is a small component with a massive responsibility—protecting the heart of your engine's fuel system. Accurate cross-referencing is the tool that ensures this protection remains uncompromised, regardless of the brand name on the box. Remember, the final step before installation is always a physical comparison to the old filter to confirm a perfect match in every dimension and feature.

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