Bosch 72143WS Engine Oil Filter

Bosch Workshop Oil Filter 72143WS Overview

The Bosch Workshop Oil Filter 72143WS is a spin-on engine oil filter built for broad fitment across Ford, Mazda, Jeep, Dodge, Lincoln, Mercury, Chrysler, Jaguar, and Mitsubishi applications. It is engineered to capture fine contaminants while maintaining steady oil flow for everyday engine protection.

With a 30-micron rating, cellulose paper media, and a nitrile gasket, this Bosch oil filter is built for dependable filtration in a wide range of vehicles, including Ford F-150, Ford Ranger, and Mazda CX-9 applications. The Bosch Workshop Oil Filter line focuses on practical engine protection and consistent performance for workshop and maintenance use.

Key Features

• Spin-on oil filter design for straightforward service replacement
• Cellulose paper filter media for efficient contaminant capture
• Filters up to 97.5% of pollutants entering the engine
• Designed to hold 13 grams of dirt within the filter media
• 30-micron filtration rating for fine particle control
• Anti-drain back valve helps retain oil in the filter after shutdown
• Bypass relief valve supports oil flow during restricted conditions
• Nitrile gasket material for sealing performance
• Inside thread size: 3/4-16
• Outside diameter: 2.992 in; height: 4.74 in

Detailed Description

Bosch 72143WS is a Workshop Oil Filter designed for engines that use a 3/4-16 spin-on filter connection. The filter media is cellulose paper, paired with an anti-drain back valve and bypass relief valve to support oil delivery and filtration under normal service conditions. Bosch rates this filter at 30 microns, with capacity to retain dirt inside the media to help reduce abrasive wear.

This part number, 72143WS, is a direct service choice for many long-running domestic and import platforms. It is commonly selected for Ford F-150, Ford Ranger, Mazda CX-9, and related applications where a spin-on/canister oil filter is specified. The Bosch Workshop Oil Filter line is built around filtration efficiency and engine cleanliness rather than unnecessary complexity.

This part cross-references Motorcraft FL-1A for the same application.

What It Helps Address

• Engine wear caused by circulating dirt and debris
• Reduced oil cleanliness during routine service intervals
• Oil drain-back after engine shutdown
• Restricted oil flow during cold starts or high-load operation
• Premature filter saturation from contaminant buildup

Installation Notes and Tips

Verify the engine uses a 3/4-16 spin-on oil filter before installation. Check the sealing surface, lubricate the gasket with clean engine oil, and tighten the filter to the vehicle manufacturer’s specified procedure. Confirm clearance around the filter body, especially on applications such as Ford F-150, Ford Ranger, and Mazda CX-9 where access can vary by engine layout.

Compatible With select 1981-2015 Ford, Mazda, Dodge, Jeep, Lincoln, Mercury, Chrysler, Jaguar, and Mitsubishi vehicles listed in the fitment data. Body fitment includes 2007-2015 Mazda CX-9, 2005-2008 Ford F-150, and 1991-2008 Ford Ranger applications.

Quality Assurance

Bosch Workshop Oil Filters are built to support consistent filtration performance with defined media efficiency, dirt-holding capacity, and valve features. Part number 72143WS is manufactured to Bosch specifications for workshop and maintenance use.