443 121 403 Coolant Expansion Tank for VOLKSWAGEN
Product: Coolant Expansion Tank
Primary OE: 443 121 403
Item code: VM01015-005
Cross-reference numbers:
443 121 403
8A0 121 403A
Brand: VOLKSWAGEN
Application reference: VOLKSWAGEN OE-reference application; confirm by VIN and removed-part comparison.
Inspection focus: cap neck, hose ports, level-sensor provision, mounting tabs and shell seams
Supply note: Request sample approval before committing to a scheduled production program.
443 121 403 is intended for OE-number-based vehicle parts selection. This VOLKSWAGEN record identifies SKU VM01015005 by OE evidence. Buyers can therefore separate 443121403 from similar-looking reservoirs.
Catalogue supersessions should be verified before a bulk order is released. For 443121403, no unverified model is published. The blank model filter protects SKU VM01015005 from unsupported fitment claims.
Product Technical Specifications
| Product type | Coolant Expansion Tank |
|---|---|
| Primary OE reference | 443 121 403 |
| Internal item code | VM01015-005 |
| Vehicle brand | VOLKSWAGEN |
| Model filter | Not specified; verify by VIN and original part |
| Cross-reference numbers | 443 121 403 / 8A0 121 403A |
OE Reference Approval
Begin 443121403 verification with the complete OE reference.
Compare SKU VM01015005 against the original VOLKSWAGEN reservoir.
For 443121403, record VIN, production date and catalogue conditions.
Cross references can locate VM01015005; they cannot guarantee interchange.
The model field for 443121403 stays blank without dependable evidence.
Pre-Installation Acceptance Checks
Inspect 443121403 before transferring service hardware.
Reject SKU VM01015005 if ports, seams or brackets are damaged.
Keep 443121403 sealed against workshop dust before installation.
During VM01015005 replacement, bleed the cooling circuit correctly and inspect every joint at operating temperature.
If coolant staining, pressure loss, brittle plastic or recurring low-level warnings continues, test the circuit around 443121403.
Why Reservoir Integrity Matters
OE 443121403 identifies a coolant expansion tank for the VOLKSWAGEN engine cooling circuit.
Inside that circuit, 443121403 provides reserve volume for thermal expansion and returns coolant as the system cools.
SKU VM01015005 must keep coolant available without external leakage.
After installing 443121403, observe level stability and connection dryness.
Procurement Data for Importers
Use 443121403 as the principal purchasing reference.
Pair 443121403 with internal item code VM01015005.
For SKU VM01015005, state quantity, destination and label requirements.
Yongshang Auto can review 443121403 samples and export cartons.
VOLKSWAGEN distributors may request VM01015005 packing confirmation before shipment.
Practical Fitment Comparison
Place 443121403 beside the removed tank before installation.
On SKU VM01015005, compare cap neck, hose ports, level-sensor provision, mounting tabs and shell seams.
Every 443121403 connection should align without body stress.
Review 2 square images showing SKU VM01015005 from available angles.
Final approval of 443121403 still requires physical measurement.
OE Reference Questions and Answers
What role does 443 121 403 perform in a VOLKSWAGEN vehicle?
OE 443121403 identifies the coolant expansion tank. In the VOLKSWAGEN system, 443121403 provides reserve volume for thermal expansion and returns coolant as the system cools.
What is the safest way to confirm 443 121 403?
Approve 443121403 with VIN and production data. Match SKU VM01015005 directly against the removed tank. Regional changes can alter 443121403 connection geometry.
Which connection details identify 443 121 403?
On 443121403, examine cap neck, hose ports, level-sensor provision, mounting tabs and shell seams. Use the VM01015005 gallery for orientation. Confirm 443121403 dimensions on the vehicle.
What should be diagnosed before replacing 443 121 403?
Inspect 443121403 when the vehicle shows coolant staining, pressure loss, brittle plastic or recurring low-level warnings. During VM01015005 diagnosis, test nearby hoses, seals and sensors. Do not treat 443121403 as the only possible cause.
How should a purchasing team identify 443 121 403?
Request 443121403 pricing with item code VM01015005. Add quantity, destination and packaging instructions. Send original-part evidence when 443121403 needs application review.
Confirm 443 121 403 Before Ordering
Send 443121403 quantity and destination to Yongshang Auto. Identify the request with SKU VM01015005. Add packing details and original-part evidence when 443121403 needs application review.
Catalogue notice: 443121403 identifies the reference, not guaranteed fitment. Confirm SKU VM01015005 through VIN, chassis and removed-part comparison.
