171 121 407E Coolant Expansion Tank for VOLKSWAGEN
Product: Coolant Expansion Tank
Primary OE: 171 121 407E
Item code: VM01015-007
Cross-reference numbers:
171 121 407E
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: Mixed-model consolidation can be discussed with the destination and quantity.
171 121 407E is catalogued for technical comparison with the removed tank. This VOLKSWAGEN record identifies SKU VM01015007 by OE evidence. Buyers can therefore separate 171121407E from similar-looking reservoirs.
Compare all suffixes because one character can indicate a revised design. For 171121407E, no unverified model is published. The blank model filter protects SKU VM01015007 from unsupported fitment claims.
Product Technical Specifications
| Product type | Coolant Expansion Tank |
|---|---|
| Primary OE reference | 171 121 407E |
| Internal item code | VM01015-007 |
| Vehicle brand | VOLKSWAGEN |
| Model filter | Not specified; verify by VIN and original part |
| Cross-reference numbers | 171 121 407E |
Reservoir Function in the Vehicle System
OE 171121407E identifies a coolant expansion tank for the VOLKSWAGEN engine cooling circuit.
Inside that circuit, 171121407E provides reserve volume for thermal expansion and returns coolant as the system cools.
SKU VM01015007 must keep coolant available without external leakage.
After installing 171121407E, observe level stability and connection dryness.
Part-Number Validation Process
Begin 171121407E verification with the complete OE reference.
Compare SKU VM01015007 against the original VOLKSWAGEN reservoir.
For 171121407E, record VIN, production date and catalogue conditions.
Cross references can locate VM01015007; they cannot guarantee interchange.
The model field for 171121407E stays blank without dependable evidence.
Mounting and Connection Checkpoints
Place 171121407E beside the removed tank before installation.
On SKU VM01015007, compare cap neck, hose ports, level-sensor provision, mounting tabs and shell seams.
Every 171121407E connection should align without body stress.
Review 3 square images showing SKU VM01015007 from available angles.
Final approval of 171121407E still requires physical measurement.
Packaging and Component Protection
Inspect 171121407E before transferring service hardware.
Reject SKU VM01015007 if ports, seams or brackets are damaged.
Keep 171121407E sealed against workshop dust before installation.
During VM01015007 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 171121407E.
Procurement Data for Importers
Use 171121407E as the principal purchasing reference.
Pair 171121407E with internal item code VM01015007.
For SKU VM01015007, state quantity, destination and label requirements.
Yongshang Auto can review 171121407E samples and export cartons.
VOLKSWAGEN distributors may request VM01015007 packing confirmation before shipment.
Frequently Asked Questions
What role does 171 121 407E perform in a VOLKSWAGEN vehicle?
OE 171121407E identifies the coolant expansion tank. In the VOLKSWAGEN system, 171121407E provides reserve volume for thermal expansion and returns coolant as the system cools.
How should a distributor screen 171 121 407E?
Approve 171121407E with VIN and production data. Match SKU VM01015007 directly against the removed tank. Regional changes can alter 171121407E connection geometry.
Which mounting details matter on 171 121 407E?
On 171121407E, examine cap neck, hose ports, level-sensor provision, mounting tabs and shell seams. Use the VM01015007 gallery for orientation. Confirm 171121407E dimensions on the vehicle.
When should a technician inspect 171 121 407E?
Inspect 171121407E when the vehicle shows coolant staining, pressure loss, brittle plastic or recurring low-level warnings. During VM01015007 diagnosis, test nearby hoses, seals and sensors. Do not treat 171121407E as the only possible cause.
What should a distributor send when enquiring about 171 121 407E?
Request 171121407E pricing with item code VM01015007. Add quantity, destination and packaging instructions. Send original-part evidence when 171121407E needs application review.
Request Pricing for 171 121 407E
Send 171121407E quantity and destination to Yongshang Auto. Identify the request with SKU VM01015007. Add packing details and original-part evidence when 171121407E needs application review.
Buyer verification note: 171121407E identifies the reference, not guaranteed fitment. Confirm SKU VM01015007 through VIN, chassis and removed-part comparison.
