Air Box for BMW 3 Series: Cast Iron
This air box for the BMW 3 Series is specified around cast iron, 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 warranty claims traced back to a single lot, or a supplier who changed material without saying so. Both are specification problems, and both are preventable.
Specification
| Product | Air Box |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Cast Iron |
| Typical use | Farm Use |
| MOQ | 3,000 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 20-40 days after approval |
| Compliance | IATF 16949 |
| Packing | 20 pieces per inner box, 200 per carton |
Material options
- Reinforced Nylon — the cost-effective default for volume programmes
- Polypropylene — the cost-effective default for volume programmes
- Nylon 66 — preferred when weight matters more than rigidity
- PU Leather — selected when the part is exposed to weather and road salt
- Ceramic Composite — used when the finish has to hold a coating
Processes available
- CNC machining
- heat treatment
- die casting
- sintering
- rubber vulcanisation
- injection moulding
Fitment notes
Check whether the mounting points on your market version match the catalogue drawing — regional variants are the usual cause of a wrong first order.
Where it is used
The specification above is the one most often ordered for farm use. Related applications include long-distance touring, rental fleets, farm use, heavy load hauling, night riding.
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
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.
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.
What testing is included?
Standard lots ship with dimensional and hardness reports. IATF 16949 documentation is issued with the shipment when your market requires it.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.
