Air Suspension Bag for BMW 3 Series: Anodised Aluminium
This air suspension bag for the BMW 3 Series is specified around anodised aluminium, 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 a supplier who changed material without saying so. Both are specification problems, and both are preventable.
Specification
| Product | Air Suspension Bag |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Anodised Aluminium |
| Typical use | Mountain Roads |
| MOQ | 3,000 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 15-40 days after approval |
| Compliance | RoHS |
| Packing | 50 pieces per inner box, 1000 per carton |
Material options
- Carbon Fibre Composite — chosen where wear resistance comes first
- Aluminium Alloy — selected when the part is exposed to weather and road salt
- Titanium Alloy — chosen where wear resistance comes first
- Silicone — selected when the part is exposed to weather and road salt
- Neoprene — preferred when weight matters more than rigidity
Processes available
- surface grinding
- injection moulding
- precision stamping
- die casting
- gravity casting
- CNC machining
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 mountain roads. Related applications include security patrols, ride-hailing fleets, rental fleets, roadside assistance, weekend 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
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.
What testing is included?
Standard lots ship with dimensional and hardness reports. RoHS documentation is issued with the shipment when your market requires it.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the RoHS-compliant build instead of a fresh interpretation.
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.
Share a sample or a drawing and we will quote against a written specification, not against a photograph.
