Dorman 921-222 Transmission Filter Housing

Transmission Filter Housing for DSG Applications

Dorman 921-222 is a direct replacement transmission filter housing for vehicles with a cracked or stripped original housing. It restores the filter cap interface and includes a new O-ring to help maintain leak-free operation in the transmission service area.

Key Features

• Direct replacement for the original transmission filter housing
• Threaded attachment method with a 24 mm hex head drive
• Black nylon plastic construction
• Includes a new O-ring for sealing performance
• Installation torque: 20 Nm
• Cross-reference: This part cross-references OE number 02E305045 for the same application.

Detailed Description

This Dorman transmission filter housing is built for Volkswagen and Audi DSG-equipped vehicles that use the OE-style filter cap design. The 921-222 replaces a damaged housing that may no longer seal correctly, helping restore proper serviceability during transmission maintenance. It is a practical replacement for Audi A3, A3 Quattro, S3, TT, TT Quattro, Q3, Q3 Quattro, and Volkswagen Golf, GTI, Jetta, Passat, Beetle, CC, Eos, Tiguan, Golf R, Golf Alltrack, Golf SportWagen, Caddy, and R32 applications listed in the fitment data.

Use this housing when servicing a 6-speed dual clutch automatic transmission (DSG) or related applications that call for the OE-style threaded cap. The part number 921-222 is a direct-fit replacement for the original housing design and is intended to restore the sealing surface and filter cap function without changing the factory configuration.

What It Helps Fix

• Cracked transmission filter housing
• Stripped threads at the filter cap interface
• Transmission fluid seepage at the housing seal
• Improper sealing after filter service
• Damaged OE-style plastic cap from repeated maintenance

Installation Notes

Verify the transmission type and OE part number before installation. This housing uses a threaded attachment method, a 24 mm hex head, and an installation torque of 20 Nm. Replace the sealing O-ring during service and confirm the housing seats evenly before final tightening. The part number 921-222 is commonly selected for DSG filter service on Audi A3 Quattro and Volkswagen Jetta, among other listed applications.

Quality Assurance

Dorman manufactures this replacement housing as an OE-style service part for restoring factory fit and function. The included O-ring supports leak-resistant reassembly when installed to the specified torque.