NHTSA service bulletin

NHTSA Service Bulletin 10176392: Agility Fuel Systems Cng Fuel System

Official manufacturer communication context for model years not specified Agility Fuel Systems Cng Fuel System, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 10176392 summary graphic for model years not specified Agility Fuel Systems Cng Fuel System
10176392NHTSA document ID
Manufacturer communicationcommunication type
1affected product rows
1source rows grouped

Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.

Quick answer

Agility Fuel Solutions LLC (?Agility?) defueling procedure prepared for Gillig buses equipped with Type 4 fuel cylinders and electric solenoid cylinder valves and Maniflter fuel management modules (FMMs). On compressed natural gas (CNG) cylinders equipped with electric solenoid cylinder valves, verification that cylinder pressure is fully exhausted is required before any removal, replacement, tightening or loosening is performed on any valve, pressure transducer, PRD, tubing or fitting connected to the cylinders. This verification is required to confirm the electric solenoid cylinder valves opened properly during the defueling process and allowed the cylinder to be depressurized and defueled. This procedure describes two methods to defuel the cylinders, lines, and valves. Both methods include a procedure to verify the electric solenoid cylinder valves opened properly during defueling and that the cylinder pressures are fully exhausted. Either method can be used. 1.How to remove the solenoid valve components and then fully exhaust the pressure in the cylinder if the solenoid valve did not open properly when energized during defueling. 2.How to defuel the CNG system and cylinders if no battery power is available. ENP-729 is an update of ENP-164 REV H to reflect changes in FMM design and a transition to Type 4 fuel cylinders.

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

MakeModelModel yearsBuyer note
Agility Fuel SystemsCng Fuel Systemmodel years not specifiedAsk for service records and run the exact VIN before purchase.

Buyer checklist

  1. Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
  2. Check recall campaign pages for safety actions that may require dealer repair.
  3. Compare this bulletin with common problem pages for the same model and component area.
  4. Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
  5. Use the used-car buying checklist and get an independent inspection.

Frequently asked questions

What is NHTSA service bulletin 10176392?

Agility Fuel Solutions LLC (?Agility?) defueling procedure prepared for Gillig buses equipped with Type 4 fuel cylinders and electric solenoid cylinder valves and Maniflter fuel management modules (FMMs). On compressed natural gas (CNG) cylinders equipped with electric solenoid cylinder valves, verification that cylinder pressure is fully exhausted is required before any removal, replacement, tightening or.

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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