Expansion Tank for Lexus RX: Magnesium Alloy
This expansion tank for the Lexus RX 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 inconsistent hardness between lots, or premature wear on the first batch. Both are specification problems, and both are preventable.

Specification
| Product | Expansion Tank |
|---|---|
| Vehicle application | Lexus RX |
| Material / finish | Magnesium Alloy |
| Typical use | Long-Distance Touring |
| MOQ | 500 pieces per specification |
| Sampling | 14 working days, 3 days per revision |
| Bulk lead time | 15-40 days after approval |
| Compliance | E-mark |
| Packing | 100 pieces per inner box, 200 per carton |
Material options
- EPDM Rubber — specified where the part sits close to a heat source
- Stainless Steel — selected when the part is exposed to weather and road salt
- Brass — selected when the part is exposed to weather and road salt
- Aluminium Alloy — selected when the part is exposed to weather and road salt
- Zinc Plated Steel — used when the finish has to hold a coating

Processes available
- ultrasonic cleaning
- rubber vulcanisation
- laser cutting
- anodising
- surface grinding
- electroplating
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 long-distance touring. Related applications include rental fleets, daily commuting, off-road trails, airport ground fleets, urban courier work.
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
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the E-mark-compliant build instead of a fresh interpretation.
How long does sampling take?
Samples leave the factory in 14 working days, and each revision round adds about 3 days once you have seen the first piece.
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.
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.







