Buy wp20530 - Genuine Cummins Fuel Filter Assembly - wisentpartscenter.com

Description

Cummins 5321059 Fuel Filter Assembly - Genuine Cummins / Fleetguard Fuel Water Separator Assembly

The Cummins 5321059 is a genuine Cummins/Fleetguard fuel filter and water separator assembly - the aluminum head, filter, and separator bowl as a complete unit. It cleans the fuel and pulls water out before it reaches the injection system.

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

It's the last line of defense before the fuel system - it strains out dirt and drops water out of the fuel so neither reaches the pump and injectors. You replace the whole assembly (not just the FS1096 filter) when the head, bowl, drain, or water sensor is cracked, leaking, or damaged.

Issue Symptoms / When to Replace

- Fuel leak from the head or bowl
- Air drawn in causing hard start, low power, or surging
- Water-in-fuel sensor fault
- Cracked housing, broken drain, or stripped threads

Brand Information

Fleetguard is Cummins' own filtration brand, so a genuine 5321059 assembly is built and validated to Cummins fuel-system spec - the right filtration efficiency and water separation the injection system depends on, which off-brand assemblies don't guarantee. Cummins/Fleetguard builds filtration and power systems worldwide.

Installation Notes

- Prime the system after install - fill the filter and bleed air, or you'll get a hard start or no-start.
- Connect the water-in-fuel sensor and check the drain works.
- Service with the correct Fleetguard FS1096 element.

How to Identify an OEM Part

- The filter carries the Cummins and Fleetguard branding with FS1096 / 5321059 and a data-matrix code.
- The assembly part number is stamped on the aluminum head - check it there, since the filter label is the element, not the assembly.

Why buy from Wisent Parts
  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.