Brake Fluid Reservoir for BMW 3 Series: Ceramic Composite
This brake fluid reservoir for the BMW 3 Series 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 a supplier who changed material without saying so, or a fitment that looked right on paper and failed on the bench. Both are specification problems, and both are preventable.

Specification
| Product | Brake Fluid Reservoir |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Ceramic Composite |
| Typical use | Roadside Assistance |
| MOQ | 2,000 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 15-55 days after approval |
| Compliance | E-mark |
| Packing | 100 pieces per inner box, 200 per carton |
Material options
- Tempered Glass — specified where the part sits close to a heat source
- Bronze — used when the finish has to hold a coating
- Stainless Steel — specified where the part sits close to a heat source
- PU Leather — chosen where wear resistance comes first
- Natural Rubber — used when the finish has to hold a coating

Processes available
- CNC machining
- robot welding
- powder coating
- injection moulding
- laser cutting
- ultrasonic cleaning
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 roadside assistance. Related applications include track days, coastal delivery, night riding, farm use, adventure travel.
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.
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.
What is the minimum order quantity?
The standard MOQ is 2000 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
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.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.







