02E305045 DSG Transmission Filter Housing for VW Golf and Passat: Diagnosis and OE Fitment Guide

QUICK ANSWER

A confirmed cracked, distorted or leaking DSG transmission filter housing on a compatible 02E/DQ250 application should be confirmed through physical inspection and the workshop checks appropriate to this component before a replacement part is ordered. The same symptom can have more than one cause, so compare the installed component, all OE references, connections and vehicle information.

WHAT THIS PART DOES

The DSG Transmission Filter Housing supports and seals the external transmission-fluid filter on specified Volkswagen Group wet-clutch DSG transmissions. Its role does not prove that it is the cause of a customer complaint; diagnosis must connect the observed fault to this component.

SYMPTOM SNAPSHOT

• DSG fluid residue is traced to the filter housing or its sealing interface after cleaning
• The plastic housing or cap is cracked, distorted, cross-threaded or damaged
• The housing seal is flattened, cut or displaced during service
• The filter and housing area cannot maintain the specified seal after the correct filter-service procedure

These symptoms are diagnostic clues, not a guarantee that this part has failed.

DIAGNOSIS BEFORE ORDERING

1. Identify the gearbox code and confirm the 02E/DQ250 six-speed wet-clutch DSG before ordering
2. Clean the area and trace the highest fresh fluid source instead of assuming the filter housing is the leak
3. Inspect the housing, cap, filter, O-ring, threads, mating face and nearby cooler or mechatronic connections
4. Compare housing height, cap profile, filter seating, thread, seal location and every OE suffix
5. Use the specified DSG fluid, cleanliness, filter-service, tightening and temperature-based level procedures
6. Confirm engine, gearbox code, production date, market configuration and VIN because a DSG badge alone does not establish interchangeability

OEM REFERENCE

• 02E305045

Every verified OE reference from the product record is retained. Revision letters and alternate numbers must not be discarded during comparison.

OE-SPECIFIC BUYING CHECK

• Volkswagen and Audi parts catalogs identify 02E305045 as a DSG transmission filter housing used on specified 02E/DQ250 wet-clutch applications.
• The housing supports the external transmission filter and its sealing interface; a DSG fluid leak must be traced to this component rather than inferred from a fault code alone.
• Verified vehicle references include selected Volkswagen Golf, Passat and Tiguan configurations, but gearbox code, engine, production date and VIN remain decisive.
• Compare the housing profile, cap or thread, filter seating, O-ring location, mating face and service procedure before ordering.

VEHICLE APPLICATION REFERENCES

• VOLKSWAGEN Golf
• VOLKSWAGEN Passat
• VOLKSWAGEN Tiguan

Model names are reference points only. Production date, engine, market specification and connector changes can affect compatibility.

WHEN REPLACEMENT IS JUSTIFIED

Replacement is reasonable when inspection or workshop testing confirms damage or a functional failure that matches the role of this component. If the evidence conflicts with the product function, continue diagnosis instead of replacing the part.

RELATED PARTS TO INSPECT

• 02E transmission filter and housing O-ring
• Mechatronic cover, cooler connections, drain and level plugs
• Transmission case seams, driveshaft seals and other DSG fluid leak paths
• Correct DSG fluid specification and temperature-based fill level

VIN CHECK

Confirm fitment using OE number and VIN before ordering.

For fitment questions, share the OEM part number, VIN number, or vehicle information with our team before ordering.

CHECK THE PART AND OE DETAILS

Review 02E305045 product images and fitment details.

WORKSHOP AND BULK ORDERS

Repair shops and distributors can send an OE list, quantities and vehicle information for fitment review and bulk-order support.