Bosch 5018WS Engine Air Filter

Bosch Workshop Air Filter for Clean Intake Air

Bosch Workshop Air Filter 5018WS is an engine air filter built for direct-fit service on select Scion and Toyota applications. Its panel shape and high-efficiency filter media help keep outside particles out of the intake stream while maintaining airflow for everyday engine protection.

Key Features

• Panel-style engine air filter for service replacement
• High-pleat design increases available filter surface area
• High-velocity cellulose cured media with 98% filtering efficiency
• Polyurethane seal helps maintain edge sealing and surface integrity
• Seal material adds elasticity and resistance to water and heat exposure
• Bosch Workshop Air Filter line for routine intake system service

Product Details

Bosch 5018WS is part of the Workshop Air Filter line, a Bosch product line focused on replacement engine air filtration for maintenance service. This filter uses a panel configuration and a cured cellulose media engineered to trap airborne contaminants before they reach the engine. The pleated design supports a larger effective filtering area, and the polyurethane seal helps preserve fit and sealing performance over time. For drivers searching for a Bosch air filter for Scion xA, Bosch air filter for Scion xB, or Bosch air filter for Toyota Echo, 5018WS is the direct-reference part number to verify.

This part cross-references 1780121030 for the same application.

Vehicle Fitment

• Fits 2004-2006 Scion xA, Workshop Air Filter
• Fits 2004-2006 Scion xB, Workshop Air Filter
• Fits 2000-2005 Toyota Echo, Workshop Air Filter

Common Issues This Filter Helps Address

• Dirt and dust entering the engine intake
• Restricted airflow from a loaded or dirty air filter
• Reduced filtration performance during routine maintenance intervals
• Seal wear that can allow unfiltered air past the filter edge

Installation Notes and Tips

Verify the vehicle year, make, and model before ordering Bosch 5018WS. Inspect the airbox for debris, clean the housing before installation, and confirm the filter seats evenly in the airbox groove so the polyurethane seal can close properly. Replace the filter during scheduled maintenance or sooner if the existing element is visibly dirty.

Quality Assurance

Bosch designs this Workshop Air Filter with a high pleat count, 98% filtering efficiency, and a seal material selected for consistent edge sealing under heat and moisture exposure.