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Campaign 14V088 Posted February 21, 2014 958 units

2010-2015 Mack Leu Recall 14V088: Exhaust Pipe Separation

RN
Reviewed by the RecallNotify editorial team
Published June 2, 2026

Recall 14V088 covers 958 2010-2015 Mack Leu vehicles for exhaust separation and carbon monoxide exposure. Free remedy through a franchised Mack dealer.

Mack is recalling 958 2010-2015 Leu vehicles equipped with Cummins ISL engines because the exhaust pipe can disconnect from the muffler or catalyst. On twin-steer trucks operated from the right side, separated exhaust hardware can expose the operator to carbon monoxide and cause personal injury; the Mack dealer repair will be free once available.

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What's wrong?

The exhaust system on 2010-2015 Mack Leu vehicles with a Cummins ISL engine routes hot exhaust gas out of the engine and through the muffler and catalyst. The muffler reduces noise, and the catalyst treats exhaust before it exits the truck. The exhaust pipe is the metal tube that keeps that flow contained and directed away from the cab and nearby components.

On affected vehicles, the exhaust pipe can disconnect from the muffler and catalyst. When that joint separates, exhaust no longer follows the designed path through the system. The truck can become louder, and hot exhaust can exit from the separated connection instead of the tailpipe.

There is no warning sign before failure. After the pipe separates, an owner or driver can notice a sudden exhaust noise, a change in exhaust smell around the truck, or visible movement at the exhaust connection during inspection.

Who's affected?

The same exhaust-system component applies across the 2010 through 2015 model years.

2011 Mack Leu Exhaust system
2015 Mack Leu Exhaust system
2014 Mack Leu Exhaust system
2012 Mack Leu Exhaust system
2010 Mack Leu Exhaust system
Units affected958

A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included.

What's the safety risk?

On affected twin-steer Mack Leu vehicles operated from the right side, a separated exhaust pipe can expose the operator to carbon monoxide and cause personal injury. If your VIN is included, schedule recall service soon and keep the operator area ventilated until the repair is complete. Repair will be free at any franchised Mack dealer once available.

What should I do?

  1. Check your VIN to confirm your 2010-2015 Mack Leu is included in this recall.
  2. Check for the owner notice Mack mailed on April 21, 2014, then contact Mack customer service for current repair instructions.
  3. Reference recall number 14V088 and Mack recall SC0376 when you call.
  4. Ask a franchised Mack dealer about the exhaust-pipe repair that keeps the pipe connected to the muffler and catalyst.
  5. Avoid right-side operation on affected twin-steer trucks until Mack confirms the exhaust repair path.

What happens at the repair

Mack's remedy notice does not name a specific inspection, replacement, or adjustment for the exhaust pipe connection. It says Mack notified owners after the recall began on April 21, 2014, and gives Mack recall number SC0376 for service coordination. Once the dealer repair is available, a Mack technician will complete the recall work at no charge. Parts and labor are covered under the recall. Ask the Mack service desk to confirm the open repair procedure for recall 14V088 before bringing the vehicle in.

Timeline

February 21, 2014 NHTSA published the recall
April 21, 2014 Owner notification mailed

Frequently asked questions

What is recall 14V088?

Recall 14V088 covers 958 2010-2015 Mack Leu vehicles with Cummins ISL engines. The exhaust pipe can disconnect from the muffler or catalyst, and on twin-steer vehicles operated from the right side, that separation creates a carbon monoxide exposure risk. Mack recall number SC0376 applies.

What should I do if my 2010-2015 Mack Leu is on this recall?

Check your VIN to confirm your specific vehicle is included in recall 14V088. If it is, contact a franchised Mack dealer and reference Mack recall number SC0376. Ask the service desk to confirm the repair path for the exhaust pipe and muffler connection.

Is the recall repair free?

Yes. Federal recall law requires the manufacturer to complete recall repairs at no cost to the owner. For recall 14V088, contact a franchised Mack dealer and reference Mack recall number SC0376 so the service desk can match your Leu to the campaign.

What is the safety risk in recall 14V088?

The safety risk is carbon monoxide exposure. If the exhaust pipe separates from the muffler on a twin-steer Mack Leu operated from the right side, the operator can be exposed to carbon monoxide levels that cause personal injury. Confirm your VIN and arrange dealer service.

What if I bought this Mack Leu used?

The free recall repair still applies. Federal recall obligations follow the vehicle, not the first owner. If you never received a Mack letter, check your VIN to confirm whether your specific Leu is included, then call a franchised Mack dealer with recall number 14V088 and Mack number SC0376.

More information

NHTSA campaign pagenhtsa.gov/vehicle-recalls/14V088000
Mack customer service1-336-393-2000
NHTSA recall #14V088
NHTSA recall # (full)14V088000

Source documents

This article is generated from NHTSA's primary recall filings and reviewed against the source on June 2, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →