Window Switch for BMW 3 Series: Brass
This window switch for the BMW 3 Series 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 premature wear on the first batch, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.

Specification
| Product | Window Switch |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Brass |
| Typical use | Coastal Delivery |
| MOQ | 3,000 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 25-40 days after approval |
| Compliance | ISO/TS 16949 |
| Packing | 20 pieces per inner box, 1000 per carton |
Material options
- Anodised Aluminium — preferred when weight matters more than rigidity
- Zinc Plated Steel — preferred when weight matters more than rigidity
- Tempered Glass — preferred when weight matters more than rigidity
- Brass — used when the finish has to hold a coating
- Forged Aluminium — preferred when weight matters more than rigidity

Processes available
- sintering
- robot welding
- assembly line testing
- shot blasting
- CNC machining
- gravity 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 coastal delivery. Related applications include wet weather riding, mountain roads, roadside assistance, motocross, daily commuting.
Quality and packing
- In-line inspection with AQL 2.5 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.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ISO/TS 16949-compliant build instead of a fresh interpretation.
What testing is included?
Standard lots ship with dimensional and hardness reports. ISO/TS 16949 documentation is issued with the shipment when your market requires it.
What is the minimum order quantity?
The standard MOQ is 3000 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
Share a sample or a drawing and we will quote against a written specification, not against a photograph.







