Crankshaft for BMW 3 Series: Stainless Steel
This crankshaft for the BMW 3 Series is specified around stainless steel, 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 packing that arrived crushed at the port, or packing that arrived crushed at the port. Both are specification problems, and both are preventable.
Specification
| Product | Crankshaft |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Stainless Steel |
| Typical use | Roadside Assistance |
| MOQ | 1,000 pieces per specification |
| Sampling | 14 working days, 3 days per revision |
| Bulk lead time | 15-30 days after approval |
| Compliance | SAE J431 |
| Packing | 50 pieces per inner box, 1000 per carton |
Material options
- Forged Aluminium — used when the finish has to hold a coating
- Anodised Aluminium — specified where the part sits close to a heat source
- High Density Foam — chosen where wear resistance comes first
- PU Leather — chosen where wear resistance comes first
- ABS Plastic — preferred when weight matters more than rigidity
Processes available
- injection moulding
- surface grinding
- ultrasonic cleaning
- anodising
- CNC machining
- heat treatment
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 roadside assistance. Related applications include farm use, motocross, daily commuting, urban courier work, coastal delivery.
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 SAE J431-compliant build instead of a fresh interpretation.
How long does sampling take?
Samples leave the factory in 14 working days, and each revision round adds about 3 days once you have seen the first piece.
What is the minimum order quantity?
The standard MOQ is 1000 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.
