1J0612041GS 1J0612041CA Brake Booster Vacuum Hose: Diagnosis and OE Fitment Guide

QUICK ANSWER

Suspected loss of brake-booster vacuum supply or a damaged vacuum connection 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 Brake Booster Vacuum Hose carries vacuum to the brake booster to support power-assisted brake operation. 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

• Hose, check valve or connector is visibly split, loose or damaged
• Vacuum leakage is confirmed at a hose connection
• Brake pedal assistance is reduced and the vacuum supply path requires diagnosis
• Check valve does not hold vacuum when tested according to vehicle procedure

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

DIAGNOSIS BEFORE ORDERING

1. Do not road-test a vehicle with uncertain braking assistance
2. Inspect the entire hose, quick connectors, seals and retaining tabs
3. Test vacuum supply and check-valve direction using the applicable procedure
4. Inspect the booster and vacuum source before assigning the fault to the hose
5. Compare routing, valve orientation, branches and end fittings before ordering

OEM REFERENCE

• 1J0612041GS
• 1J0612041CA

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

• Catalog references identify 1J0612041GS as a brake-booster vacuum pipe with a one-way check valve.
• Catalog references associate 1J0612041CA with the later 1J0612041GS reference in multiple markets.
• Engine, transmission and market configuration can change the vacuum-line form; compare the installed routing, valve and VIN before ordering.
• Catalog references identify 1J0612041CA as a brake-booster vacuum hose and associate it with the 1J0612041GS application family.

VEHICLE APPLICATION REFERENCES

• VOLKSWAGEN Beetle
• VOLKSWAGEN Jetta
• VOLKSWAGEN Golf
• VOLKSWAGEN Bora

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

• Vacuum pump or intake vacuum source
• Brake booster and one-way check valve
• Connectors, seals and adjacent vacuum lines

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 1J0612041GS / 1J0612041CA 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.