Expansion Tank for Audi A4: Brass
This expansion tank for the Audi A4 is specified around brass, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is documentation that arrived after the container shipped, or packing that arrived crushed at the port. Both are specification problems, and both are preventable.
Specification
| Product | Expansion Tank |
|---|---|
| Vehicle application | Audi A4 |
| Material / finish | Brass |
| Typical use | Construction Sites |
| MOQ | 3,000 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 25-55 days after approval |
| Compliance | E-mark |
| Packing | 100 pieces per inner box, 1000 per carton |
Material options
- ABS Plastic — selected when the part is exposed to weather and road salt
- Titanium Alloy — selected when the part is exposed to weather and road salt
- High Density Foam — specified where the part sits close to a heat source
- Bronze — the cost-effective default for volume programmes
- Silicone — used when the finish has to hold a coating
Processes available
- shot blasting
- anodising
- electroplating
- cold forging
- rubber vulcanisation
- laser cutting
Fitment notes
Confirm the fitment against the VIN or the frame number before ordering; two model years often share a name and not a part.
Where it is used
The specification above is the one most often ordered for construction sites. Related applications include coastal delivery, long-distance touring, daily commuting, mining sites, rental fleets.
Quality and packing
- In-line inspection with AQL 1.5 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the E-mark-compliant build instead of a fresh interpretation.
How is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
Can you match an existing sample?
Send a sample and we will reverse-engineer the specification, then produce a counter sample for approval before any bulk starts.
What happens if a lot fails inspection?
The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.
