Air Duct for BMW 3 Series: Natural Rubber
This air duct for the BMW 3 Series is specified around natural rubber, 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 inconsistent hardness between lots, or packing that arrived crushed at the port. Both are specification problems, and both are preventable.
Specification
| Product | Air Duct |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Natural Rubber |
| Typical use | Heavy Load Hauling |
| MOQ | 1,000 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 15-55 days after approval |
| Compliance | ECE R90 |
| Packing | 20 pieces per inner box, 1000 per carton |
Material options
- Carbon Steel — used when the finish has to hold a coating
- High Density Foam — the cost-effective default for volume programmes
- Kevlar Composite — the cost-effective default for volume programmes
- Stainless Steel — chosen where wear resistance comes first
- Tempered Glass — specified where the part sits close to a heat source
Processes available
- robot welding
- CNC machining
- sintering
- cold forging
- shot blasting
- gravity casting
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 heavy load hauling. Related applications include night riding, adventure travel, passenger transport, mining sites, rental fleets.
Quality and packing
- In-line inspection with AQL 4.0 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 long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 5 days once you have seen the first piece.
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.
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 the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ECE R90-compliant build instead of a fresh interpretation.
Share a sample or a drawing and we will quote against a written specification, not against a photograph.
