ATP Parts B-131 Transmission Filter Kit

Transmission Filter Kit for Nissan and INFINITI

ATP Parts B-131 is a premium replacement transmission filter kit for select Nissan and INFINITI applications. It helps keep transmission fluid cleaner so the valve body and other internal components stay free of debris that can restrict operation.

Built for service work on Nissan Frontier, Pathfinder, Xterra, 240SX, 300ZX, Pickup, D21, and INFINITI QX4, J30, and M30 applications, this kit supports routine transmission maintenance on vehicles with the listed fitments.

Key Features

• Premium replacement transmission filter kit from ATP Parts
• Helps maintain cleaner transmission fluid during service intervals
• Designed for select Nissan and INFINITI automatic transmission applications
• Fits applications that use a 9.5-inch filter length
• Includes a pan gasket on listed applications
• Part number B-131 for easy identification

Detailed Description

ATP Parts Premium Replacement B-131 is a transmission filter kit made for service on select Nissan and INFINITI vehicles. Regular filter replacement helps remove wear debris from the transmission fluid, reducing the chance that the valve body and related hydraulic passages become restricted. This is especially relevant for Nissan Frontier and Pathfinder models, as well as Xterra, 240SX, 300ZX, Pickup, D21, QX4, J30, and M30 applications listed in the fitment data. This part cross-references Bosch 15522 for the same application.

Common Service Issues Addressed

• Dirty transmission fluid from normal wear debris
• Restricted fluid flow through the valve body
• Harsh or inconsistent shifting related to filter contamination
• Transmission service intervals that require filter replacement
• Preventable wear from neglected fluid filtration

Installation Notes and Tips

• Verify transmission model and filter length before ordering; several listings specify RL4F03A.
• Confirm the vehicle year and model exactly against the fitment table for Nissan Frontier, Pathfinder, Xterra, and related applications.
• Inspect the pan sealing surface and clean the transmission pan before installation.
• Replace the filter during a fluid service to help maintain proper transmission cleanliness.

Quality Assurance

ATP Parts Premium Replacement components are built for direct service use in the applications listed above. B-131 is engineered as a replacement transmission filter kit for routine maintenance on select Nissan and INFINITI vehicles.