Differential for BMW 3 Series: Powder Coated Steel
This differential for the BMW 3 Series is specified around powder coated 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 lead time that slipped twice before bulk started, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.
Specification
| Product | Differential |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Powder Coated Steel |
| Typical use | Motocross |
| MOQ | 500 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 25-30 days after approval |
| Compliance | RoHS |
| Packing | 50 pieces per inner box, 1000 per carton |
Material options
- Carbon Fibre Composite — specified where the part sits close to a heat source
- Kevlar Composite — used when the finish has to hold a coating
- Magnesium Alloy — used when the finish has to hold a coating
- Natural Rubber — specified where the part sits close to a heat source
- Anodised Aluminium — used when the finish has to hold a coating
Processes available
- CNC machining
- heat treatment
- anodising
- assembly line testing
- injection moulding
- gravity casting
Fitment notes
Check whether the mounting points on your market version match the catalogue drawing — regional variants are the usual cause of a wrong first order.
Where it is used
The specification above is the one most often ordered for motocross. Related applications include track days, security patrols, passenger transport, roadside assistance, rental fleets.
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
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 RoHS-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.
What is the minimum order quantity?
The standard MOQ is 500 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
Send the specification you are working to and we will confirm what we can match, what we would change and why.
