Brake Booster for Audi A4: High Density Foam
This brake booster for the Audi A4 is specified around high density foam, 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 specification nobody had written down, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.

Specification
| Product | Brake Booster |
|---|---|
| Vehicle application | Audi A4 |
| Material / finish | High Density Foam |
| Typical use | Rental Fleets |
| MOQ | 200 pieces per specification |
| Sampling | 14 working days, 5 days per revision |
| Bulk lead time | 15-30 days after approval |
| Compliance | ECE R90 |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- Cast Iron — used when the finish has to hold a coating
- Powder Coated Steel — used when the finish has to hold a coating
- Bronze — chosen where wear resistance comes first
- Carbon Fibre Composite — chosen where wear resistance comes first
- Ceramic Composite — the cost-effective default for volume programmes

Processes available
- injection moulding
- powder coating
- heat treatment
- cold forging
- sintering
- rubber vulcanisation
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 rental fleets. Related applications include airport ground fleets, long-distance touring, construction sites, off-road trails, 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
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.
What is the minimum order quantity?
The standard MOQ is 200 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
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.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ECE R90-compliant build instead of a fresh interpretation.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.







