Recall 24V645 affects 80 2022-2024 Autocar Legend vehicles for mispositioned exhaust near the CNG fuel tank. Repair is free at a franchised Autocar dealer.
Autocar is recalling 80 2022-2024 Legend vehicles because the horizontal exhaust diffuser can be positioned incorrectly and direct exhaust toward the CNG fuel tank. Exhaust heat can overheat the tank and increase fire risk, and Autocar dealers will complete the repair free of charge.
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What's wrong?
The horizontal exhaust diffuser on the 2022-2024 Autocar Legend is the outlet piece that spreads exhaust flow after it leaves the engine and tailpipe. On these CNG chassis, the diffuser is supposed to direct hot exhaust away from the compressed natural gas fuel tanks. That spacing matters because the tanks store fuel under pressure and should not sit in the exhaust path.
On affected trucks, an Autocar manufacturing error left the horizontal diffuser pointed toward the fuel tank area instead of away from it. That sends exhaust heat in the wrong direction. The recall repair is an inspection of the diffuser position, followed by repositioning when the diffuser is aimed at the tanks.
There is no warning sign before failure. The problem is the installed position of the diffuser, so an owner should not expect a dashboard light, noise, or smell before the exhaust is aimed incorrectly.
Who's affected?
Spans the 2022, 2023, and 2024 Legend model years, all using the same horizontal exhaust diffuser.
| 2023 Autocar Legend | Manifold/header/muffler/tail pipe |
|---|---|
| 2024 Autocar Legend | Manifold/header/muffler/tail pipe |
| 2022 Autocar Legend | Manifold/header/muffler/tail pipe |
| Units affected | 80 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
If your VIN is included, heat from exhaust fumes can overheat the fuel tank and increase the risk of a fire. There is no warning sign listed for this recall, so schedule the dealer inspection soon. Repair is free at any franchised Autocar dealer.
What should I do?
- Check your VIN to confirm your 2022-2024 Autocar Legend is included in this recall.
- Contact a franchised Autocar dealer to schedule the free exhaust-diffuser inspection and repositioning that redirects exhaust away from the CNG fuel tank.
- Bring the recall notice if Autocar mailed one. If not, reference recall number 24V645 when you call.
- Avoid extra operation until the dealer confirms the exhaust diffuser is positioned correctly.
- Call Autocar customer service at 1-888-218-3611 with questions and reference Autocar recall DC-2406.
What happens at the repair
At the dealer, an Autocar technician inspects the horizontal exhaust diffuser and repositions it if needed so it does not vent exhaust toward the CNG fuel tank. The recall repair is available now, and parts and labor are free. Autocar uses its standard reimbursement plan for this recall, so if you already paid out of pocket for a related diffuser repair, bring receipts or repair paperwork to the service desk and ask how to submit a claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| October 25, 2024 | Owner notification mailed |
|---|---|
| October 25, 2024 | Dealer notification began |
| October 25, 2024 | Interim owner notification (was planned for this date) |
| October 28, 2024 | Dealer notification ended |
| October 29, 2024 | NHTSA published the recall |
Frequently asked questions
What is recall 24V645?
Recall 24V645 covers 80 2022-2024 Autocar Legend vehicles with a horizontal exhaust diffuser that is improperly positioned. Exhaust fumes can vent toward the CNG fuel tank, overheat it, and increase the risk of a fire. Autocar dealers will inspect and reposition the diffuser for free.
What should I do if my 2022-2024 Autocar Legend is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 24V645. If it is, contact a franchised Autocar dealer to schedule the exhaust diffuser inspection and repositioning. Reference recall 24V645 or Autocar recall DC-2406 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 Autocar dealers will inspect and reposition the exhaust diffuser as needed free of charge. Parts and labor are covered for vehicles included in recall 24V645.
What is the safety risk?
The safety risk is fire. If the exhaust diffuser vents hot exhaust toward the CNG fuel tank, the tank can overheat. That condition increases the risk of a fire. The dealer repair fixes the diffuser position so exhaust is routed correctly.
When were owners notified about this Autocar recall?
Autocar mailed owner notification letters on October 25, 2024. If you own a 2022-2024 Autocar Legend and never received a letter, check your VIN and contact an Autocar dealer or Autocar customer service at 1-888-218-3611 with recall DC-2406.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/24V645000 |
|---|---|
| Autocar customer service | 1-888-218-3611 |
| NHTSA recall # | 24V645 |
| NHTSA recall # (full) | 24V645000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notification Letter (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Report (PDF)
- Download Owner Notice (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →