Bosch Engine Air Filter 5146WS for Honda/Acura — High-Pleat, 98% Particle Efficiency

The BOSCH 5146WS Workshop Engine Air Filter is a high-pleat replacement filter that captures 98% of small airborne particles to protect your engine and help maintain fuel efficiency.

Keeping intake air free of dust and debris is essential for engine longevity and consistent performance. The BOSCH 5146WS is built with a dense, high-pleat media and a resilient polyurethane foam seal to deliver strong particle holding capacity while minimizing airflow resistance. This filter is engineered for select Honda and Acura applications, and it's designed to be inspected and replaced during routine service intervals such as oil changes.

How does the 5146WS reduce engine wear?

The filter traps tiny particles that would otherwise enter the combustion chamber and accelerate component wear. Its cured cellulose media and increased pleat count provide a large surface area for particle capture without significantly restricting intake flow.

• 98% efficiency in removing small particulates from incoming air
• High-pleat construction increases dust-holding capacity
• Even pleat spacing maintains consistent filtration performance

Will this filter affect my car's airflow or fuel economy?

The BOSCH 5146WS is designed to balance filtration and airflow: high-velocity media reduces resistance while still capturing contaminants. Proper filtration helps engines run more efficiently by preventing deposits and maintaining designed airflow, which can support stable fuel mileage compared with a clogged or low-quality filter.

• Low air resistance from cured cellulose media
• Optimized pleat spacing keeps airflow steady under load
• Sealing foam prevents unfiltered air bypass around the edges

How do I know if the 5146WS fits my vehicle and when to replace it?

This Bosch filter fits select Honda and Acura models; always confirm fitment with your vehicle details before purchase. Inspect the air filter at every oil change and replace it if it appears dirty, damaged, or compressed to restore full protection and airflow.

• Common compatible models include Acura TSX (2004–2008) and Honda Accord (2003–2007)
• Verify fitment using year, make, model, and engine information
• Replace during routine maintenance or sooner if heavily soiled

The BOSCH 5146WS uses a polyurethane foam seal to resist water and heat intrusion, which helps keep intake air clean in varied driving conditions. The elastic seal maintains a reliable barrier against unfiltered air, while the robust media stands up to extended service intervals.

What are the construction highlights of this Bosch Workshop filter?

Quality materials and attention to pleat geometry are the core advantages: more pleats mean a larger filtering surface, so the media holds more particles before airflow is affected. The cured cellulose media offers a balance of filtration efficiency and minimal drag, and the foam gasket ensures a tight, durable installation.

• Durable, high-pleat media for increased dust capacity
• Cured cellulose reduces resistance and keeps pleats even
• Polyurethane foam gasket for resilient sealing and weather resistance

Who this filter is for: drivers who perform regular vehicle maintenance and want a high-quality replacement that prioritizes engine protection and consistent airflow. If you own a compatible Acura TSX or Honda Accord, or another model confirmed by a fit checker, the BOSCH 5146WS is a straightforward upgrade from worn or generic filters. It’s especially suited to owners seeking a balance of strong particle capture and minimal impact on engine breathing during daily driving or highway use.