Recall 20V646 covers 4,294 2019-2021 Mitsubishi Fuso FEC7T, FEC9T, and Feczt trucks for loose exhaust studs. Repair is free at any franchised Mitsubishi Fuso dealer.
Mitsubishi Fuso is recalling 4,294 2019-2021 FEC7T, FEC9T, and Feczt trucks because exhaust pipe studs and nuts were not properly tightened. Loose exhaust mounting can let hot exhaust gases leak and increase the risk of fire; Mitsubishi Fuso dealers will tighten the exhaust pipe studs and nuts free of charge.
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What's wrong?
The exhaust manifold studs on 2019-2021 Mitsubishi Fuso FEC7T, FEC9T, and Feczt trucks are threaded fasteners that hold the exhaust pipe tight against the exhaust manifold. The manifold collects hot exhaust gases from the engine, and the pipe carries those gases away through the exhaust system. Those studs and nuts need the right clamping force to keep the joint sealed.
On the recalled trucks, the studs and nuts were not tightened enough during assembly. With normal engine vibration and heat, that loose joint can let exhaust gases escape near the manifold instead of staying inside the pipe. Hot exhaust leaking in that area creates a fire risk.
An owner can notice an engine warning lamp or hear an exhaust leak. The sound can be a ticking, puffing, or louder exhaust noise near the engine area, especially when the engine is running under load.
Who's affected?
Spans three Mitsubishi Fuso cabover truck models across the 2019-2021 model years, all tied to the exhaust pipe attaching stud in the exhaust manifold.
| 2020 Mitsubishi Fuso FEC7T | Manifold/header/muffler/tail pipe |
|---|---|
| 2021 Mitsubishi Fuso FEC9T | Manifold/header/muffler/tail pipe |
| 2020 Mitsubishi Fuso FEC9T | Manifold/header/muffler/tail pipe |
| 2021 Mitsubishi Fuso FEC7T | Manifold/header/muffler/tail pipe |
| 2019 Mitsubishi Fuso FEC7T | Manifold/header/muffler/tail pipe |
| 2020 Mitsubishi Fuso Feczt | Manifold/header/muffler/tail pipe |
| 2021 Mitsubishi Fuso Feczt | Manifold/header/muffler/tail pipe |
| 2019 Mitsubishi Fuso FEC9T | Manifold/header/muffler/tail pipe |
| 2019 Mitsubishi Fuso Feczt | Manifold/header/muffler/tail pipe |
| Units affected | 4,294 |
| 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?
Loose exhaust mounting lets hot exhaust gases leak and increases fire risk. An engine warning lamp or an audible exhaust leak is a reason to schedule service promptly and avoid unnecessary driving until the truck is checked. Repair is free at any franchised Mitsubishi Fuso dealer.
What should I do?
- Check your VIN to confirm your 2019-2021 Mitsubishi Fuso FEC7T, FEC9T, or Feczt is included in this recall.
- Contact a franchised Mitsubishi Fuso dealer to schedule the free exhaust-stud and nut torque repair that secures the exhaust mounting and stops hot exhaust gas leaks.
- Bring the recall notice if Mitsubishi Fuso mailed one. If not, reference recall number 20V646 when you call.
- Ask the dealer whether the truck is safe to drive before the repair if you suspect an exhaust leak.
What happens at the repair
At the dealer, a Mitsubishi Fuso technician checks the exhaust pipe studs and nuts and tightens them to the correct torque specification. The work addresses fasteners that were not tightened properly during assembly. Parts and labor are covered under the recall, so the dealer repair is free. Ask the service desk to document that recall 20V646 was completed on your truck before you leave.
Timeline
| October 19, 2020 | NHTSA published the recall |
|---|---|
| December 11, 2020 | Owner notification mailed |
| December 16, 2020 | Dealer notification began |
| December 16, 2020 | Dealer notification ended |
| December 18, 2020 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 20V646?
Recall 20V646 covers 4,294 2019-2021 Mitsubishi Fuso FEC7T, FEC9T, and Feczt trucks with exhaust pipe studs and nuts that were not tightened correctly. Loose exhaust mounting can let hot exhaust gases leak, which raises fire risk. Mitsubishi Fuso dealers tighten the studs and nuts for free.
What should I do if my 2019-2021 Mitsubishi Fuso FEC7T, FEC9T, or Feczt is on this recall?
Check your VIN to confirm your specific truck is included in recall 20V646. If it is, contact a franchised Mitsubishi Fuso dealer to schedule the exhaust stud and nut torque repair. Reference recall number 20V646 and Mitsubishi Fuso recall number C10114 when you call.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair the defect at no cost, and Mitsubishi Fuso dealers will tighten the exhaust studs and nuts to the correct torque specification free of charge. Parts and labor are covered for included vehicles.
What is the safety risk?
The safety risk is fire. If the exhaust mounting is loose, hot exhaust gases can leak from the exhaust system. That heat near truck components raises the risk of a fire, so owners with an included VIN should schedule the free dealer repair.
What if I bought my Mitsubishi Fuso truck used?
The free recall repair still applies. Recall eligibility follows the VIN, not the first owner. If you bought the truck used and never received the notice mailed after December 11, 2020, check your VIN and call a franchised Mitsubishi Fuso dealer with recall number 20V646.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V646000 |
|---|---|
| Mitsubishi Fuso customer service | 1-877-711-0707 |
| NHTSA recall # | 20V646 |
| NHTSA recall # (full) | 20V646000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →