Knock Sensor for Tesla Model 3: Magnesium Alloy
This knock sensor for the Tesla Model 3 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 a supplier who changed material without saying so, or lead time that slipped twice before bulk started. Both are specification problems, and both are preventable.

Specification
| Product | Knock Sensor |
|---|---|
| Vehicle application | Tesla Model 3 |
| Material / finish | Magnesium Alloy |
| Typical use | Adventure Travel |
| MOQ | 500 pieces per specification |
| Sampling | 7 working days, 3 days per revision |
| Bulk lead time | 25-55 days after approval |
| Compliance | SAE J431 |
| Packing | 50 pieces per inner box, 1000 per carton |
Material options
- Anodised Aluminium — specified where the part sits close to a heat source
- Forged Aluminium — specified where the part sits close to a heat source
- Powder Coated Steel — the cost-effective default for volume programmes
- High Density Foam — selected when the part is exposed to weather and road salt
- Cast Iron — chosen where wear resistance comes first

Processes available
- anodising
- heat treatment
- powder coating
- die casting
- assembly line testing
- cold forging
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 adventure travel. Related applications include delivery fleets, off-road trails, track days, mountain roads, wet weather riding.
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 is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
How long does sampling take?
Samples leave the factory in 7 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 SAE J431-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 500 pieces per line.
Send the specification you are working to and we will confirm what we can match, what we would change and why.







