Torsion Bar for BMW X5: Zinc Plated Steel
This torsion bar for the BMW X5 is specified around zinc plated 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 inconsistent hardness between lots, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.
Specification
| Product | Torsion Bar |
|---|---|
| Vehicle application | BMW X5 |
| Material / finish | Zinc Plated Steel |
| Typical use | Track Days |
| MOQ | 200 pieces per specification |
| Sampling | 14 working days, 5 days per revision |
| Bulk lead time | 25-55 days after approval |
| Compliance | SAE J431 |
| Packing | 20 pieces per inner box, 1000 per carton |
Material options
- Reinforced Nylon — used when the finish has to hold a coating
- Nylon 66 — the cost-effective default for volume programmes
- Kevlar Composite — specified where the part sits close to a heat source
- Cast Iron — preferred when weight matters more than rigidity
- Forged Aluminium — the cost-effective default for volume programmes
Processes available
- anodising
- robot welding
- injection moulding
- die casting
- heat treatment
- gravity casting
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 track days. Related applications include delivery fleets, weekend riding, mining sites, night riding, rental fleets.
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 5 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 SAE J431-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 testing is included?
Standard lots ship with dimensional and hardness reports. SAE J431 documentation is issued with the shipment when your market requires it.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.
