Recall 15V532 affects 33 2014-2015 Oshkosh S-Series concrete mixers for faulty CNG pressure relief devices. Repair is free at any franchised Oshkosh dealer.
Oshkosh is recalling 33 2014-2015 S-Series concrete mixers powered by compressed natural gas because their pressure relief devices can fail to vent pressure in the CNG tank. If pressure builds and the device does not activate, the tank can explode, which raises the risk of fire and injury; Oshkosh dealers will complete the recall repair free of charge.
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What's wrong?
The 2014-2015 Oshkosh S-Series concrete mixer uses compressed natural gas tanks, and each tank is protected by a pressure relief device. That device is designed to open when heat raises tank pressure, venting gas instead of letting pressure build inside the tank.
In recall 15V532, the concern is inside the thermal pressure relief device on affected CNG-equipped mixers. Some Emcara devices were made with a surface finish that did not meet specification, and that rough surface increases the force needed for the internal thermal trigger to move. If the tank is exposed to fire, the device can fail to activate and the pressure does not vent as designed.
This problem is not tied to a normal driving symptom, dash light, smell, or sound. There is no warning sign before failure. The difference is confirmed by checking the pressure relief device serial number against the recalled range.
Who's affected?
Covers the 2014 and 2015 S-Series model years, both tied to the fuel system pressure relief device.
| 2015 Oshkosh S-Series | fuel system |
|---|---|
| 2014 Oshkosh S-Series | fuel system |
| Units affected | 33 |
| 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?
The pressure relief device is meant to protect the CNG tank during pressure buildup. If it fails to activate, the tank is at risk of explosion, fire, and injury. Schedule the inspection and repair soon, and ask the dealer about safe handling. Repair is free at any franchised Oshkosh dealer.
What should I do?
- Check your VIN to confirm your 2014-2015 Oshkosh S-Series is included in this recall.
- Contact a franchised Oshkosh dealer to schedule the free PRD inspection and replacement that restores pressure relief for the CNG tank.
- Bring the recall notice if Oshkosh mailed one. If not, reference recall number 15V532 when you call.
- Avoid fire exposure around the CNG tank until the PRD inspection and repair is complete.
- Call Oshkosh customer service at 1-888-686-7278 with questions about scheduling or the Emcara 15E-059 recall.
What happens at the repair
The recall repair is available. At the dealer, an Oshkosh technician inspects the pressure relief devices on the CNG system and replaces any PRDs that need replacement. These devices are part of the tank pressure protection system, so the inspection checks whether the affected parts need replacement under campaign 15V532. Parts and labor are free under the recall. Oshkosh began the recall on September 25, 2015, so an included 2014-2015 S-Series concrete mixer should be handled through an Oshkosh dealer now.
Timeline
| August 20, 2015 | NHTSA published the recall |
|---|---|
| September 14, 2015 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| September 14, 2015 | Interim owner notification (was planned for this date) |
| September 25, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 15V532?
Recall 15V532 covers 33 2014-2015 Oshkosh S-Series concrete mixers powered by compressed natural gas. The pressure relief devices on the CNG tanks can fail to vent pressure during a fire exposure. Oshkosh dealers will inspect and replace the devices as needed for free.
What should I do if my 2014-2015 Oshkosh S-Series is on this recall?
Check your VIN to confirm your specific mixer is included in recall 15V532. If it is, contact an Oshkosh dealer to schedule the pressure relief device inspection and replacement as needed. Reference recall number 15V532 and Oshkosh recall number Emcara 15E-059 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Oshkosh dealers will inspect the pressure relief devices and replace them as needed free of charge.
What is the safety risk?
The safety risk is pressure buildup in a compressed natural gas tank that does not vent as designed. If the pressure relief device fails during fire exposure, the CNG tank can explode, increasing the risk of fire and injury. The dealer repair addresses that defect.
When did the Oshkosh S-Series recall begin?
The recall began on September 25, 2015. Oshkosh notified owners, and dealers were instructed to inspect the pressure relief devices and replace them as needed. If you own one of these mixers now, the VIN decides whether the free repair still applies.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V532000 |
|---|---|
| Oshkosh customer service | 1-888-686-7278 |
| NHTSA recall # | 15V532 |
| NHTSA recall # (full) | 15V532000 |
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 May 31, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →