Recall 15V330 affects 44 2012-2014 Oshkosh S-Series concrete mixer vehicles for an engine vent tube defect. Repair is free at any franchised Oshkosh dealer.
Oshkosh is recalling 44 2012-2014 S-Series front discharge concrete mixers because excessive crankcase pressure can detach a vent tube elbow and let engine oil reach hot surfaces. That oil contact raises the risk of fire, and Oshkosh dealers will complete the recall repair free of charge.
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What's wrong?
The crankcase ventilation breather on 2012-2014 Oshkosh S-Series concrete mixers helps manage pressure inside the engine crankcase, the lower part of the engine where oil and moving parts are housed. It routes crankcase pressure and oil vapor through a vent tube assembly so the engine can run without forcing oil or vapor out of place.
On affected mixers with Cummins Westport ISL G engines, excessive crankcase pressure can overwhelm that connection. The barbs on the breather exit tube do not hold the 90-degree elbow tightly enough under those conditions. A cracked piston was the main cause found in known incidents. When the elbow detaches, engine oil can reach hot engine surfaces.
Warning signs include a loss of engine power, amber or red engine diagnostic lamps on the instrument cluster, or erratic engine operation. Those signs mean the engine is building pressure or misfiring in a way that needs dealer attention.
Who's affected?
Covers 3 S-Series model years with the same engine component listed across the scope.
| 2014 Oshkosh S-Series | Engine |
|---|---|
| 2012 Oshkosh S-Series | Engine |
| 2013 Oshkosh S-Series | Engine |
| Units affected | 44 |
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?
Engine oil on a hot surface increases the risk of a fire. Watch for loss of engine power, amber or red engine warning lamps, or erratic engine operation, because those signs can point to the pressure condition tied to this recall. Schedule the repair soon. Repair is free at any franchised Oshkosh dealer.
What should I do?
- Check your VIN to confirm your 2012-2014 Oshkosh S-Series is included in this recall.
- Contact a franchised Oshkosh dealer to schedule the free repair: securing the 90-degree vent-tube elbow and reprogramming the ECM to limit crankcase pressure under misfire conditions.
- Bring the recall notice if Oshkosh or Cummins mailed one. If not, reference recall number 15V330 when you call.
- Call Oshkosh customer service at 1-888-686-7278 with questions about the repair or dealer scheduling.
- Avoid operating the mixer if you smell oil or see oil near hot engine surfaces; contact the dealer for guidance before moving it.
What happens at the repair
At the dealer, an Oshkosh technician secures the ends of the 90-degree elbow on the crankcase ventilation breather vent tube assembly. The technician also reprograms the ECM with software that adjusts engine output under misfire conditions to limit crankcase pressure. The recall repair is free, including parts and labor. If you already paid for a related repair before the recall work was done, Oshkosh has a general reimbursement plan on file. Contact Oshkosh customer service with repair invoices or other documentation for the claim process.
| Reimbursement | Reimbursement available |
|---|
Timeline
| June 1, 2015 | NHTSA published the recall |
|---|---|
| June 6, 2015 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| June 6, 2015 | Interim owner notification (was planned for this date) |
| June 12, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 15V330?
Recall 15V330 covers 44 2012-2014 Oshkosh S-Series front-discharge concrete mixer vehicles with Cummins Westport ISL G engines. Excessive crankcase pressure can detach the 90-degree vent tube elbow and let engine oil reach hot surfaces, increasing fire risk.
What should I do if my 2012-2014 Oshkosh S-Series is on this recall?
Check your VIN to confirm your specific concrete mixer is included in recall 15V330. If it is, contact an Oshkosh service dealer or Cummins customer service and reference recall 15V330. The repair secures the vent tube elbow and reprograms the engine control module.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and the remedy states that the vent tube elbow work and engine control module reprogramming are performed free of charge.
What is the safety risk?
The safety risk is fire. If the vent tube elbow detaches, engine oil can contact hot engine surfaces. Oshkosh reported that this condition increases the risk of a fire, so an included vehicle needs the free dealer repair.
When did the Oshkosh S-Series recall repair begin?
The recall repair began on June 12, 2015. Because the remedy is available, owners of included 2012-2014 Oshkosh S-Series vehicles can contact Oshkosh customer service at 1-888-686-7278 or Cummins customer service at 1-800-343-7357 for repair scheduling.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V330000 |
|---|---|
| Oshkosh customer service | 1-888-686-7278 |
| NHTSA recall # | 15V330 |
| NHTSA recall # (full) | 15V330000 |
Source documents
-
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 →