Recall 15V329 covers 102 2015-2016 International Lonestar and 9900 trucks for a stack tail pipe that can separate. Free repair at a franchised International dealer.
International is recalling 102 2015-2016 Lonestar and 9900 trucks because an unsupported 6-inch stack tail pipe can crack the weld joint during normal operation. If the stack tail pipe separates, it can fall into the roadway and strike another vehicle, increasing crash risk; International dealers will complete the repair free of charge.
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What's wrong?
The 6-inch stack tail pipe on the 2015-2016 International Lonestar and 9900 trucks is the vertical exhaust outlet that carries exhaust gases up and away from the cab and body. It is part of the exhaust system, so it needs enough support to handle heat, vibration, and the weight of the upper pipe during normal operation.
On affected trucks, the upper stack tail pipe does not have enough support. The weld joint between the inlet pipe and the flare expansion can crack as the truck vibrates. Navistar traced the problem to a manual weld and grinding process that left the attachment incomplete on some pipes. If that joint breaks, the stack tail pipe can partly or fully separate from the vertical exhaust pipe.
The warning sign is a visible crack at the joint between the flare pipe and the vertical exhaust pipe. A service inspection should focus on that joint before the pipe separates.
Who's affected?
Covers both International truck lines across the 2015 and 2016 model years, all tied to the same exhaust system component.
| 2015 International Lonestar | Manifold/header/muffler/tail pipe |
|---|---|
| 2015 International 9900 | Manifold/header/muffler/tail pipe |
| 2016 International 9900 | Manifold/header/muffler/tail pipe |
| 2016 International Lonestar | Manifold/header/muffler/tail pipe |
| Units affected | 102 |
| Field incidents | NHTSA has logged 14 field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included in this recall.
What's the safety risk?
If the stack tail pipe separates from the exhaust pipe, it can fall into the roadway, hit another vehicle, and increase the risk of a crash. Cracks at the joint between the flare pipe and vertical exhaust pipe are the warning sign before separation, so schedule inspection and repair soon. Repair is free at any franchised International dealer.
What should I do?
- Check your VIN to confirm your 2015-2016 International Lonestar or 9900 is included in this recall.
- Contact a franchised International dealer to schedule the free one-piece stack tail pipe replacement that fixes the unsupported exhaust stack.
- Bring the owner letter if you have it, or reference recall number 15V329 when you call.
- Avoid putting the truck back in service if the stack tail pipe is cracked, loose, or partly separated. Contact the dealer before driving it again.
What happens at the repair
At the dealer, an International technician replaces the 6-inch stack tail pipe with a one-piece stack tail pipe that has the required support. The recall repair is free, including parts and labor. If you paid out of pocket for this exhaust repair before the owner notification, the manufacturer's standard reimbursement plan applies. Follow the reimbursement instructions included in the customer notification, and keep any repair invoice or payment documentation for the claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| May 29, 2015 | NHTSA published the recall |
|---|---|
| July 20, 2015 | Dealer notification began |
| July 20, 2015 | Dealer notification ended |
| July 20, 2015 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| July 20, 2015 | Interim owner notification (was planned for this date) |
| July 29, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 15V329?
Recall 15V329 covers 102 2015-2016 International Lonestar and 9900 trucks with a 6-inch stack tail pipe that lacks enough support. The weld joint can crack, letting the tail pipe separate from the vertical exhaust pipe. International dealers replace it with a one-piece stack tail pipe for free.
What should I do if my 2015-2016 International Lonestar or 9900 is on this recall?
Check your VIN to confirm your specific truck is included in recall 15V329. If it is, contact a franchised International dealer to schedule the stack tail pipe replacement. Reference recall number 15V329 and International recall number 15511 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and International dealers replace the affected stack tail pipe free of charge. The remedy uses a one-piece stack tail pipe to address the separation risk.
What is the safety risk?
The risk is a stack tail pipe separating from the exhaust pipe and falling into the roadway. If that happens, the pipe can hit another vehicle and increase crash risk. Confirm the VIN and arrange the free dealer repair if your truck is included.
When did the repair become available?
The recall repair began on July 20, 2015. International dealers replace the affected stack tail pipe with a one-piece stack tail pipe free of charge. Owners can contact International customer service at 1-800-448-7825 and reference recall number 15511.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V329000 |
|---|---|
| International customer service | 1-800-448-7825 |
| NHTSA recall # | 15V329 |
| NHTSA recall # (full) | 15V329000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 1, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →