ATP Parts B-345 Transmission Filter Kit

Transmission Filter Kit for BMW Service

ATP Parts B-345 is a premium replacement transmission filter kit built to help keep automatic transmission fluid clean. For BMW 325Ci, 325i, 330i, 530i, Z4, and related applications, this service kit supports routine maintenance that helps reduce debris buildup inside the transmission.

ATP Parts Premium Replacement line focuses on direct-fit service parts for maintenance work where clean fluid and proper filtration matter. The B-345 transmission filter kit is a practical choice for BMW transmission service on 2000-2006 applications listed below.

• Transmission filter kit for BMW automatic transmission service
• Helps remove wear-related debris from transmission fluid
• Supports cleaner fluid flow through the valve body and internal passages
• Fits select BMW 323Ci, 323i, 328Ci, 328i, 320i, 325i, 325Ci, 330i, 330Ci, 525i, 530i, and Z4 applications
• ATP Parts B-345 premium replacement part number

Detailed Product Overview

Transmission fluid is the working fluid of the transmission, and filtration plays a direct role in keeping internal components clean. ATP Parts B-345 is designed for routine transmission service on select BMW models, including 2000-2006 BMW 325Ci and 2001-2003 BMW 330i applications. It also covers additional BMW fitments such as 320i, 525i, 530i, and Z4, making it a useful service part for maintenance on multiple BMW platforms. This part number, B-345, is part of ATP Parts Premium Replacement line and is intended for owners and technicians replacing a worn or clogged transmission filter during scheduled service.

This part cross-references Bosch 17039 for the same application.

What It Helps Address

• Dirty or contaminated transmission fluid
• Debris buildup from normal transmission wear
• Restricted fluid flow through the valve body
• Service needs on BMW automatic transmission maintenance
• Reduced filtration performance from an aging filter

Installation Notes and Tips

Install during a transmission fluid service and verify the vehicle’s transmission configuration before ordering. Fitment includes 2000-2006 BMW applications such as 2001-2006 BMW 325Ci, 2001-2005 BMW 320i, 2001-2005 BMW 325i, 2005 BMW 530i, 2003-2005 BMW Z4, 2004 BMW 525i, 2001-2003 BMW 330Ci, 2001-2003 BMW 330i, 2002-2003 BMW 525i, 2002-2003 BMW 530i, 2000 BMW 323Ci, 2000 BMW 323i, 2000 BMW 328Ci, and 2000 BMW 328i. Notes include 22-hole gasket on select 2004-2005 BMW 525i and 530i applications.

Quality Assurance

ATP Parts positions this item in its Premium Replacement line for service-focused applications. The manufacturer describes this filter as a maintenance part intended to help keep transmission fluid clean and protect internal transmission components from clogging-related issues.