Recall 10V165 covers 11 2007, 2009 Westport Isx G vehicles for blocked LNG pump vent holes. Repair is free at any franchised Westport dealer.
Westport is recalling 11 2007, 2009 Isx G Class 8 vehicles because the liquefied natural gas pump pressure relief valve vent hole was covered during welding. A blocked vent can make the relief valve ineffective, allow high-pressure gas to leak within the tank shroud, and create risk of personal injury, vehicle damage, or property damage; the dealer repair will be free once available.
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What's wrong?
The liquefied natural gas pump on 2007, 2009 Westport Isx G Class 8 vehicles moves LNG through the fuel system so the engine can receive fuel at the right pressure. The pump also uses a pressure relief valve, a safety valve that vents excess pressure instead of letting gas collect inside the pump.
On the recalled trucks, a welding step during pump manufacturing covered the vent hole tied to that pressure relief valve. With the vent blocked, the valve cannot do its normal job. If the manual shut-off valve is closed, gas can build up inside the pump instead of venting through the relief path.
An owner is not expected to get a dashboard light, sound, smell, or drivability change that clearly points to this defect. There is no warning sign before failure.
Who's affected?
The scope is limited to two listed model years, both tied to the same fuel-system component.
| 2007 Westport Isx G | fuel system |
|---|---|
| 2009 Westport Isx G | fuel system |
| Units affected | 11 |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific vehicle is included.
What's the safety risk?
A sudden high pressure gas leak inside the tank shroud can release tank pressure and lead to personal injury, vehicle damage, or property damage. Keep away from the tank area and schedule the recall inspection. Repair will be free at any franchised Westport dealer once available.
What should I do?
- Check your VIN to confirm your 2007, 2009 Westport Isx G is included in this recall.
- Wait for Westport's owner letter before arranging recall work, since the remedy status is not listed as available in the source record.
- Contact Westport at 1-909-823-9955 after your VIN is confirmed, and reference recall number 10V165.
- Ask about the free automatic shut-off valve upgrade that fixes the pressure-relief-valve vent issue in the LNG pump.
- Avoid closing the manual shut-off valve until Westport gives repair or service guidance for your vehicle.
What happens at the repair
The remedy is an inspection of the LNG pump pressure relief valve area, followed by an upgrade to an automatic shut-off valve that does not rely on the vent hole. A Westport technician handles the inspection and valve upgrade under the recall. The final repair is not marked as available here, so confirm repair availability before bringing the truck in. Once the final dealer repair is available, the recall work is free. The filing said the safety recall was expected to begin during May 2010 and listed Inland Kenworth Fontana and Inland Kenworth Montebello as owner contacts.
Timeline
| April 23, 2010 | NHTSA published the recall |
|---|---|
| April 30, 2010 | Owner notification mailed |
Frequently asked questions
What is recall 10V165?
Recall 10V165 covers 11 2007, 2009 Westport Isx G Class 8 vehicles with liquefied natural gas pumps. A blocked vent hole can make the pump pressure relief valve ineffective, allowing gas pressure to build when the manual shut-off valve is closed.
What should I do if my 2007, 2009 Westport Isx G is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 10V165. If it is, contact Westport or the listed service contact to schedule the pump inspection and automatic shut-off valve upgrade. Reference recall number 10V165 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the defect remedy at no cost, and Westport's recall remedy states that the inspection and automatic shut-off valve upgrade will be performed free of charge.
What is the safety risk?
The safety risk is a sudden leak of high-pressure gas within the tank shroud and a slower leak of tank pressure. Westport says this can result in personal injury, vehicle damage, or property damage. The repair path is an inspection and valve upgrade at no cost.
What if I bought this Westport Isx G used?
The free recall repair still applies. Ownership history does not remove the vehicle from a safety recall. Check your VIN to confirm whether this Isx G is included, then call Westport or the listed service contact with recall number 10V165.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/10V165000 |
|---|---|
| Westport customer service | 1-909-823-9955 |
| NHTSA recall # | 10V165 |
| NHTSA recall # (full) | 10V165000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Defect / Noncompliance Notice (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 3, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →