NHTSA Service Bulletin 11030744: Bendix Service Brakes Air
Official manufacturer communication context for model years not specified Bendix Service Brakes Air, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.
Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
Service Data - Bendix Reservoirs The reservoir is a storage tank; its function is to provide a volume of compressed air for braking which will be adequate in relation to the volume used by the brake chambers and auxiliary devices. If the vehicle is not equipped with an air dryer, reservoirs provide a location in the system where the air, heated by compression, may be cooled and the water vapor condensed. Bendix reservoirs are built in accordance with SAE Surface Vehicle Standard SAE J10. They are made from steel sheet, with stamped heads and rolled shells. The seams are electrically welded, and each reservoir is internally coated for corrosion resistance. Each reservoir is tested at 300 psi hydrostatic pressure. Reservoirs are supplied in various pipe ferrule arrangements and lengthsand in diameters from 31/2-in. to 14-in.having various volumes from approximately 100 to 7600 cubic inches for tractors and trailers. All ferrules are tapped to SAE dry-seal pipe thread standards. Reservoirs are also supplied in double- and triple-compartment configurations.
What this bulletin may mean before buying
Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.
Affected products listed in this communication
Buyer checklist
- Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
- Check recall campaign pages for safety actions that may require dealer repair.
- Compare this bulletin with common problem pages for the same model and component area.
- Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
- Use the used-car buying checklist and get an independent inspection.
Frequently asked questions
What is NHTSA service bulletin 11030744?
Service Data - Bendix Reservoirs The reservoir is a storage tank; its function is to provide a volume of compressed air for braking which will be adequate in relation to the volume used by the brake chambers and auxiliary devices. If the vehicle is not equipped with an air dryer, reservoirs provide a location in the system where the air, heated by compression, may be cooled and the water vapor condensed. Bendix.
Is a service bulletin the same as a recall?
No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.
How should a used-car buyer use this bulletin?
Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
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