Coil Spring for BMW X5: Ceramic Composite
This coil spring for the BMW X5 is specified around ceramic composite, 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 packing that arrived crushed at the port, or packing that arrived crushed at the port. Both are specification problems, and both are preventable.
Specification
| Product | Coil Spring |
|---|---|
| Vehicle application | BMW X5 |
| Material / finish | Ceramic Composite |
| Typical use | Mountain Roads |
| MOQ | 3,000 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 25-30 days after approval |
| Compliance | REACH |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- Sintered Metal — chosen where wear resistance comes first
- Carbon Fibre Composite — used when the finish has to hold a coating
- Ceramic Composite — specified where the part sits close to a heat source
- PVC Coated Fabric — chosen where wear resistance comes first
- Magnesium Alloy — preferred when weight matters more than rigidity
Processes available
- rubber vulcanisation
- anodising
- CNC machining
- gravity casting
- heat treatment
- surface grinding
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 roadside assistance, coastal delivery, construction sites, wet weather riding, ride-hailing fleets.
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
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the REACH-compliant build instead of a fresh interpretation.
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.
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.
