Brake Master Cylinder for BMW X5: Magnesium Alloy
This brake master cylinder 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 premature wear on the first batch, or inconsistent hardness between lots. Both are specification problems, and both are preventable.

Specification
| Product | Brake Master Cylinder |
|---|---|
| Vehicle application | BMW X5 |
| Material / finish | Magnesium Alloy |
| Typical use | Mining Sites |
| MOQ | 2,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 15-55 days after approval |
| Compliance | REACH |
| Packing | 50 pieces per inner box, 1000 per carton |
Material options
- Reinforced Nylon — chosen where wear resistance comes first
- Cast Iron — chosen where wear resistance comes first
- Sintered Metal — selected when the part is exposed to weather and road salt
- Ceramic Composite — selected when the part is exposed to weather and road salt
- Carbon Fibre Composite — preferred when weight matters more than rigidity

Processes available
- die casting
- electroplating
- ultrasonic cleaning
- heat treatment
- injection moulding
- rubber vulcanisation
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 mining sites. Related applications include delivery fleets, construction sites, night riding, roadside assistance, passenger transport.
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 long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 3 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 2000 pieces per line.
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.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.







