Cylinder Head for BMW 3 Series: Carbon Steel
This cylinder head for the BMW 3 Series is specified around carbon 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 reorders that did not match the approved sample, or a supplier who changed material without saying so. Both are specification problems, and both are preventable.
Specification
| Product | Cylinder Head |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Carbon Steel |
| Typical use | Roadside Assistance |
| MOQ | 3,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 15-40 days after approval |
| Compliance | IATF 16949 |
| Packing | 50 pieces per inner box, 200 per carton |
Material options
- Forged Aluminium — chosen where wear resistance comes first
- Stainless Steel — the cost-effective default for volume programmes
- PVC Coated Fabric — selected when the part is exposed to weather and road salt
- Brass — selected when the part is exposed to weather and road salt
- Magnesium Alloy — chosen where wear resistance comes first
Processes available
- surface grinding
- precision stamping
- assembly line testing
- cold forging
- gravity casting
- die 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 roadside assistance. Related applications include passenger transport, rural transport, ride-hailing fleets, off-road trails, mining sites.
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
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.
How long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 3 days once you have seen the first piece.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the IATF 16949-compliant build instead of a fresh interpretation.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 3000 pieces per line.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.
