Oxygen Sensor for BMW 3 Series: Bronze
This oxygen sensor for the BMW 3 Series is specified around bronze, 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 fitment that looked right on paper and failed on the bench, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.

Specification
| Product | Oxygen Sensor |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Bronze |
| Typical use | Weekend Riding |
| MOQ | 3,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 15-55 days after approval |
| Compliance | DOT |
| Packing | 50 pieces per inner box, 1000 per carton |
Material options
- Cast Iron — specified where the part sits close to a heat source
- Forged Aluminium — used when the finish has to hold a coating
- Aluminium Alloy — the cost-effective default for volume programmes
- ABS Plastic — preferred when weight matters more than rigidity
- Powder Coated Steel — used when the finish has to hold a coating

Processes available
- shot blasting
- precision stamping
- anodising
- gravity casting
- ultrasonic cleaning
- assembly line testing
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 weekend riding. Related applications include roadside assistance, night riding, delivery fleets, motocross, airport ground 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
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 3000 pieces per line.
What testing is included?
Standard lots ship with dimensional and hardness reports. DOT documentation is issued with the shipment when your market requires it.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the DOT-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.
Share a sample or a drawing and we will quote against a written specification, not against a photograph.







