Dorman 991-001 Transmission Fluid Filler Cap

Transmission Filler Cap for Honda Applications

Dorman 991-001 is a transmission fluid filler cap built to match the fit and function of the original cap on select Honda vehicles. It replaces a missing or damaged cap to help keep contaminants out of the transmission and reduce fluid loss.

Compatible with 2014-2020 Honda Civic, 2015-2020 Honda Fit, and 2016-2017 Honda HR-V, this OE-style replacement is a direct service part for common Honda transmission maintenance needs.

Key Features

• OE-style replacement for the original transmission filler cap
• Press-fit attachment type for the specified Honda applications
• Black and silver finish
• Constructed from rubber and steel
• Designed for Honda Civic, Honda Fit, and Honda HR-V fitment
• Dorman part number 991-001 for catalog and service reference

Detailed Description

This transmission fluid filler cap is engineered for specified Honda models where the original cap is missing, worn, or damaged. Dorman 991-001 follows the original fit and function so the transmission opening remains properly covered during service and normal operation. The press-fit design and rubber-and-steel construction support a secure seal at the filler location.

Use this cap on 2014-2020 Honda Civic, 2015-2020 Honda Fit, and 2016-2017 Honda HR-V applications that call for this style of transmission filler cap. If you are searching for a Honda Civic transmission filler cap, Honda Fit transmission cap, or Honda HR-V transmission filler cap, Dorman 991-001 is the direct replacement part to reference.

This part cross-references 256155T0004 for the same application.

What It Helps Solve

• Missing transmission filler cap
• Damaged or cracked cap at the transmission fill opening
• Contamination entering the transmission during service or operation
• Transmission fluid loss from an uncovered filler point
• Incorrect sealing at the filler opening after cap failure

Installation Notes and Tips

Confirm the transmission filler opening matches the press-fit style before installation. Inspect the sealing area for debris, wear, or damage, and clean the opening before seating the cap. Verify vehicle fitment by year, make, and model before ordering, especially on Honda Civic, Honda Fit, and Honda HR-V applications.

Quality Assurance

Dorman designs this replacement cap to match original equipment fit and function on the listed vehicles. It is built as a service replacement for routine transmission maintenance and repair on confirmed Honda applications.