Expansion Tank for BMW 3 Series: Aluminium Alloy
This expansion tank for the BMW 3 Series is specified around aluminium alloy, 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 a fitment that looked right on paper and failed on the bench, or reorders that did not match the approved sample. Both are specification problems, and both are preventable.
Specification
| Product | Expansion Tank |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Aluminium Alloy |
| Typical use | Construction Sites |
| MOQ | 3,000 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 25-30 days after approval |
| Compliance | SGS |
| Packing | 20 pieces per inner box, 200 per carton |
Material options
- Zinc Plated Steel — preferred when weight matters more than rigidity
- Bronze — chosen where wear resistance comes first
- Ceramic Composite — selected when the part is exposed to weather and road salt
- Anodised Aluminium — specified where the part sits close to a heat source
- Neoprene — used when the finish has to hold a coating
Processes available
- robot welding
- powder coating
- precision stamping
- sintering
- gravity casting
- die casting
Fitment notes
Keep the old part until the new one is on the bench. Comparing them side by side settles questions a photograph never will.
Where it is used
The specification above is the one most often ordered for construction sites. Related applications include passenger transport, food delivery, rental fleets, rural transport, roadside assistance.
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
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.
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.
How long does sampling take?
Samples leave the factory in 7 working days, and each revision round adds about 5 days once you have seen the first piece.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 3000 pieces per line.
Share a sample or a drawing and we will quote against a written specification, not against a photograph.
