Downpipe for BMW X5: Magnesium Alloy
This downpipe for the BMW X5 is specified around magnesium alloy, 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 a specification nobody had written down, or warranty claims traced back to a single lot. Both are specification problems, and both are preventable.
Specification
| Product | Downpipe |
|---|---|
| Vehicle application | BMW X5 |
| Material / finish | Magnesium Alloy |
| Typical use | Ride-Hailing Fleets |
| MOQ | 2,000 pieces per specification |
| Sampling | 7 working days, 3 days per revision |
| Bulk lead time | 25-40 days after approval |
| Compliance | DOT |
| Packing | 20 pieces per inner box, 500 per carton |
Material options
- Chromed Steel — chosen where wear resistance comes first
- Sintered Metal — preferred when weight matters more than rigidity
- Polypropylene — specified where the part sits close to a heat source
- Semi-Metallic Compound — preferred when weight matters more than rigidity
- Natural Rubber — preferred when weight matters more than rigidity
Processes available
- CNC machining
- shot blasting
- surface grinding
- ultrasonic cleaning
- cold forging
- rubber vulcanisation
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 ride-hailing fleets. Related applications include farm use, daily commuting, urban courier work, delivery fleets, weekend riding.
Quality and packing
- In-line inspection with AQL 1.5 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
What testing is included?
Standard lots ship with dimensional and hardness reports. DOT documentation is issued with the shipment when your market requires it.
How long does sampling take?
Samples leave the factory in 7 working days, and each revision round adds about 3 days once you have seen the first piece.
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.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the DOT-compliant build instead of a fresh interpretation.
Send the specification you are working to and we will confirm what we can match, what we would change and why.
