Recall 21V080 covers 132 2021-2022 Peterbilt vehicles with Cummins X15 engines for loose flywheel capscrews. Repair is free at any franchised Peterbilt dealer.
Peterbilt is recalling 132 2021-2022 367, 579, 389, and 567 trucks because improperly torqued capscrews can let the flywheel detach from the crankshaft. A detached flywheel can cause loss of drive power and send driveline pieces out of the engine compartment, so Peterbilt dealers will complete the free repair.
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What's wrong?
The flywheel on affected 2021-2022 Peterbilt trucks with a Cummins X15 engine is a heavy rotating disc bolted to the crankshaft. It helps carry engine power smoothly from the crankshaft into the clutch and transmission. The capscrews are the bolts that clamp the flywheel to the crankshaft, so their clamping force matters every time the engine runs.
On these trucks, the flywheel-to-crankshaft capscrews were not tightened to the required torque during engine assembly. The assembly tool did not have the needed lower control limit, so an under-tightened capscrew left the flywheel connection loose. As the engine runs, that looseness can let the flywheel move and eventually detach from the crankshaft.
Before failure, drivers with manual transmissions can notice unusual noise, vibration, or difficult clutch operation. Trucks with automated transmissions can show a clutch fault lamp. Treat those signs as dealer-service issues, because they point to movement in a part that should stay firmly bolted in place.
Who's affected?
The listed trucks span the 2021 and 2022 model years and share the same Cummins X15 engine.
| 2022 Peterbilt 367 | Engine |
|---|---|
| 2022 Kenworth T680 | Engine |
| 2021 Peterbilt 367 | Engine |
| 2021 Kenworth T800B | Engine |
| 2021 Peterbilt 389 | Engine |
| 2021 Peterbilt 567 | Engine |
| 2021 Kenworth W990 | Engine |
| 2021 Kenworth T880 | Engine |
| 2022 Peterbilt 579 | Engine |
| 2021 Kenworth T680 | Engine |
| 2021 Peterbilt 579 | Engine |
| 2021 Kenworth W900 | Engine |
| 2022 Peterbilt 389 | Engine |
| 2022 Peterbilt 567 | Engine |
| 2022 Kenworth T800B | Engine |
| 2022 Kenworth W900 | Engine |
| 2022 Kenworth T880 | Engine |
| Units affected | 132 |
| 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?
A detached flywheel can cut drive power and increase crash risk. Driveline pieces can also eject from the engine compartment and injure people nearby. Noise, vibration, difficult clutch operation, or a clutch fault lamp are warning signs to stop and arrange service. Repair is free at any franchised Peterbilt dealer.
What should I do?
- Check your VIN to confirm your 2021-2022 Peterbilt truck is included in this recall.
- Contact a franchised Peterbilt dealer to schedule the free capscrew torque repair and engine inspection that secures the flywheel to the crankshaft.
- Bring the recall notice if Peterbilt mailed one. If not, reference recall number 21V080 when you call.
- Ask the dealer to inspect the engine for damage during the recall repair, with related damage repaired free of charge if needed.
- Drive cautiously until the repair is complete. Stop driving and contact the dealer if you notice loss of drive power or engine-area vibration.
What happens at the repair
At the dealer, a Peterbilt technician properly torques the capscrews that attach the flywheel to the crankshaft. The engine is also inspected for damage and repaired if damage is found. Parts and labor are covered under the recall. Out-of-pocket repairs already paid are handled through the manufacturer's limited warranty, not through a separate reimbursement program, because the source states a prior product failure would have been covered by warranty. Ask the service desk how that warranty coverage applies if you have prior repair paperwork.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| February 17, 2021 | NHTSA published the recall |
|---|---|
| March 29, 2021 | Owner notification mailed |
Frequently asked questions
What is recall 21V080?
Recall 21V080 covers 132 2021-2022 Peterbilt 367, T680, T800B, 389, 567, W990, T880, 579, and W900 vehicles with Cummins X15 engines. The flywheel capscrews were improperly torqued, which can let the flywheel detach. Peterbilt dealers will torque the capscrews and inspect the engine for damage for free.
What should I do if my 2021-2022 Peterbilt 367, T680, T800B, 389, 567, W990, T880, 579, or W900 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V080. If it is, contact a franchised Peterbilt dealer to schedule the flywheel capscrew torque inspection and any needed engine repair. Reference recall number 21V080 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and the remedy states that dealers will properly torque the capscrews, inspect the engine for damage, and complete any necessary repair free of charge.
What is the safety risk in recall 21V080?
The risk is loss of drive power if the flywheel detaches. NHTSA also states that driveline pieces can be ejected from the engine compartment, increasing injury risk. If your VIN is included, arrange the free dealer repair before putting the vehicle back into regular service.
When did the recall repair start?
The recall repair began on March 29, 2021. Because that date has passed, affected owners can contact a franchised Peterbilt dealer now to schedule the capscrew torque correction, engine inspection, and any damage repair covered by recall 21V080.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V080000 |
|---|---|
| Peterbilt customer service | 1-425-828-5888 |
| NHTSA recall # | 21V080 |
| NHTSA recall # (full) | 21V080000 |
Source documents
-
Download Quarterly Report (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 24, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →