06H103121G 06H103121F 06K103121C Vacuum Pump Gasket for VW Golf VW Passat: Vacuum-Pump Sealing Leak Diagnosis

QUICK ANSWER

A suspected vacuum-pump sealing leak should be confirmed through fault data and physical inspection 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 Vacuum Pump Gasket seals the mating surface around the vacuum-pump assembly. 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

• Oil residue around the vacuum-pump mating surface
• Visible gasket damage after disassembly
• Leak source confirmed at the vacuum-pump joint
• Repeat oil contamination near the sealed interface

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

DIAGNOSIS BEFORE ORDERING

1. Clean the area and identify the highest point of fresh leakage
2. Inspect surrounding covers, hoses and seals before assigning the leak to the gasket
3. Confirm the pump housing and mating surface are not damaged
4. Compare every OE reference and gasket shape before ordering

OEM REFERENCE

• 06H103121G
• 06H103121F
• 06K103121C

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

VEHICLE APPLICATION REFERENCES

• VOLKSWAGEN Golf
• VOLKSWAGEN Passat

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 workshop testing confirms damage, leakage, an implausible signal or another failure that matches the function of this component. If the evidence conflicts with the product function, continue diagnosis instead of replacing the part.

RELATED PARTS TO INSPECT

• Vacuum-pump housing condition
• Adjacent seals and oil leak paths
• Fasteners and mating-surface cleanliness

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 06H103121G / 06H103121F / 06K103121C 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.