Knock Sensor for Audi A4: Forged Aluminium
This knock sensor for the Audi A4 is specified around forged aluminium, 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 reorders that did not match the approved sample. Both are specification problems, and both are preventable.
Specification
| Product | Knock Sensor |
|---|---|
| Vehicle application | Audi A4 |
| Material / finish | Forged Aluminium |
| Typical use | Food Delivery |
| MOQ | 500 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 15-30 days after approval |
| Compliance | SAE J431 |
| Packing | 50 pieces per inner box, 200 per carton |
Material options
- Forged Aluminium — preferred when weight matters more than rigidity
- Ceramic Composite — selected when the part is exposed to weather and road salt
- Chromed Steel — specified where the part sits close to a heat source
- EPDM Rubber — the cost-effective default for volume programmes
- PU Leather — used when the finish has to hold a coating
Processes available
- anodising
- ultrasonic cleaning
- heat treatment
- gravity casting
- surface grinding
- shot blasting
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 food delivery. Related applications include rental fleets, food delivery, roadside assistance, rural transport, heavy load hauling.
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.
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 SAE J431-compliant build instead of a fresh interpretation.
Ask for the current catalogue and the specification sheet for this line.
