Brake Master Cylinder for BMW 3 Series: Aluminium Alloy
This brake master cylinder for the BMW 3 Series is specified around aluminium 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 reorders that did not match the approved sample. Both are specification problems, and both are preventable.
Specification
| Product | Brake Master Cylinder |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Aluminium Alloy |
| Typical use | Daily Commuting |
| MOQ | 500 pieces per specification |
| Sampling | 14 working days, 3 days per revision |
| Bulk lead time | 15-55 days after approval |
| Compliance | DOT |
| Packing | 100 pieces per inner box, 500 per carton |
Material options
- ABS Plastic — used when the finish has to hold a coating
- Silicone — preferred when weight matters more than rigidity
- Chromed Steel — specified where the part sits close to a heat source
- PVC Coated Fabric — preferred when weight matters more than rigidity
- Semi-Metallic Compound — selected when the part is exposed to weather and road salt
Processes available
- shot blasting
- heat treatment
- electroplating
- robot welding
- assembly line testing
- powder coating
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 daily commuting. Related applications include construction sites, long-distance touring, wet weather riding, food delivery, ride-hailing fleets.
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.
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.
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.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.
