Fuel Filter for BMW 3 Series: Magnesium Alloy
This fuel filter for the BMW 3 Series 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 a supplier who changed material without saying so. Both are specification problems, and both are preventable.

Specification
| Product | Fuel Filter |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Magnesium Alloy |
| Typical use | Adventure Travel |
| MOQ | 2,000 pieces per specification |
| Sampling | 14 working days, 5 days per revision |
| Bulk lead time | 20-55 days after approval |
| Compliance | SAE J431 |
| Packing | 50 pieces per inner box, 200 per carton |
Material options
- PU Leather — chosen where wear resistance comes first
- Kevlar Composite — chosen where wear resistance comes first
- Zinc Plated Steel — selected when the part is exposed to weather and road salt
- Semi-Metallic Compound — preferred when weight matters more than rigidity
- Carbon Steel — chosen where wear resistance comes first

Processes available
- die casting
- precision stamping
- powder coating
- CNC machining
- sintering
- 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 adventure travel. Related applications include airport ground fleets, construction sites, mining sites, food delivery, farm use.
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 is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
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 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.
How long does sampling take?
Samples leave the factory in 14 working days, and each revision round adds about 5 days once you have seen the first piece.
Send the specification you are working to and we will confirm what we can match, what we would change and why.







