Coil Spring for BMW 3 Series: Magnesium Alloy
This coil spring 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 | Coil Spring |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Magnesium Alloy |
| Typical use | Off-Road Trails |
| MOQ | 2,000 pieces per specification |
| Sampling | 14 working days, 3 days per revision |
| Bulk lead time | 15-30 days after approval |
| Compliance | REACH |
| Packing | 20 pieces per inner box, 200 per carton |
Material options
- High Density Foam — used when the finish has to hold a coating
- Anodised Aluminium — specified where the part sits close to a heat source
- Neoprene — used when the finish has to hold a coating
- Zinc Plated Steel — used when the finish has to hold a coating
- Brass — used when the finish has to hold a coating
Processes available
- shot blasting
- die casting
- assembly line testing
- laser cutting
- heat treatment
- robot welding
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 off-road trails. Related applications include farm use, airport ground fleets, construction sites, rental fleets, daily commuting.
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
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 2000 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
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.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 2000 pieces per line.
Send the specification you are working to and we will confirm what we can match, what we would change and why.
