P621725 Engine Air Filter Fit for Kenworth T680 T880 - Durable

In this review the P621725 engine air filter is evaluated as a straightforward, no-nonsense replacement for heavy truck owners who need reliable filtration for PACCAR and Cummins engines. It is best for fleet mechanics and owner-operators running Kenworth T680, T880 or Peterbilt 567/579 models who want a direct-fit element that replaces several OEM and aftermarket part numbers without fuss. The single biggest reason to consider this filter is its wide compatibility with PACCAR MX11, MX13 and Cummins X15/ISX engine families, which simplifies parts stocking and reduces downtime for common heavy-duty applications.

Key Features

• Broad compatibility: Designed to fit Kenworth T680, T880 and Peterbilt 567/579 models, reducing the need to match multiple unique part numbers.
• OEM part cross-reference: Replaces Paccar P621725 and recognized aftermarket numbers so shops can swap without modifying mounting or housings.
• Engine coverage: Suitable for PACCAR MX13, PACCAR MX11 and Cummins X15 or ISX engines, providing a common filter across several drivetrain configurations.
• Aftermarket alternatives compatibility: Interchangeable with Luber-Finer LAF6725, Donaldson P637453, Baldwin PA32000 and similar parts, offering sourcing flexibility.
• Simple maintenance: White media color makes visual inspection of dirt and service intervals straightforward during routine checks.

Who It's For

This filter is aimed at commercial truck operators, fleet maintenance departments and independent mechanics who work on Kenworth and Peterbilt models powered by PACCAR or Cummins engines. If you manage multiple trucks with different model years but the same engine families, this P621725 replacement simplifies inventory and keeps service times short.

It is less suited for light passenger vehicles or trucks that do not list the compatible engines; owners of specialty engines outside the PACCAR or Cummins families should confirm fitment before purchase. Also, buyers seeking a branded OEM filter with manufacturer warranty paperwork may prefer sourcing directly from an OEM channel.

Pros & Cons

Pros

• Wide compatibility across PACCAR and Cummins engines reduces parts complexity for fleets.
• Cross-references to common aftermarket and OEM numbers make sourcing flexible in repair shops.
• Direct-fit design simplifies installation and reduces downtime during routine service.

Cons

• Packaging and branding are generic compared with factory-labeled OEM filters, which may matter for warranty records.

Specifications

Product Type	Engine air filter element
Fits Models	Kenworth T680, T880; Peterbilt 567, 579
Compatible Engines	PACCAR MX11, PACCAR MX13, Cummins X15, Cummins ISX
Replaces	Paccar P621725; LAF6725; P637453; PA32000; WA11058; 501058
Media Color	White
Brand	Pasurmu

Our Verdict

The P621725 engine air filter is a practical, cost-conscious replacement for Kenworth and Peterbilt trucks running PACCAR or Cummins engines. It delivers the convenience of broad interchangeability and a direct-fit installation, making it a sensible pick for fleets and independent shops that prioritize uptime and simplified inventory. For those needing OEM paperwork or branded packaging, confirm warranty requirements before choosing this aftermarket option.

Frequently Asked Questions

Will this filter fit a Kenworth T680 with a PACCAR MX13 engine?
Yes. The P621725 is listed as compatible with Kenworth T680 models using the PACCAR MX13 engine.

Does it replace Donaldson and Baldwin part numbers?
Yes. It cross-references Donaldson P637453 and Baldwin PA32000 among other common aftermarket numbers.

Is this an OEM Pasurmu branded filter?
It is sold under the Pasurmu brand as an aftermarket direct-fit replacement rather than an original equipment manufacturer labeled filter.