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Campaign 16V634 Posted August 31, 2016 156 units

2014-2017 Western Star Recall 16V634: Axle Hub Defect

RN
Reviewed by the RecallNotify editorial team
Published May 31, 2026

Recall 16V634 covers 156 2014-2017 Western Star trucks with front axle hubs that can fail. Repair is free at a franchised Western Star dealer.

Western Star is recalling 156 2014-2017 trucks, including the 4800, 5700, and 4700, because some Conmet aluminum front hubs have a lower capacity than the stated front axle weight limit. The hub can fail and let a wheel separate from the axle, which increases crash risk; Western Star dealers will complete the recall repair free of charge.

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What's wrong?

The front axle hub is the metal center section that connects the wheel assembly to the axle and gives the wheel a supported surface to turn on. In these 2014-2017 Western Star trucks, the recalled part is a Conmet aluminum non-high capacity hub. That hub has to match the load rating of the front axle, because it carries the wheel load every mile the truck moves.

On affected trucks, the front axle configuration rating is greater than the hub capacity for trucks built with front axle ratings above 13,300 lbs. That mismatch puts more load on the hub than it is rated to handle. Under that load, the hub can fail, and the wheel can separate from the axle.

There is no warning sign before failure. A driver should not expect a dashboard light, noise, vibration, or steering change to appear before the hub gives way.

Who's affected?

Spans 8 truck models across the 2014-2017 model years, all tied to the same drive axle component.

2014 Western Star 4800 drive axle
2014 Western Star 5700 drive axle
2015 Freightliner 108SD drive axle
2015 Freightliner Cascadia drive axle
2014 Freightliner Cascadia drive axle
Units affected156
Field incidentsNHTSA has logged no field incidents to date.

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?

A wheel separating from the axle increases the risk of a crash for the driver and nearby traffic. Schedule the hub replacement soon, and ask the dealer whether the truck is safe to move before driving it in for service. Repair is free at any franchised Western Star dealer.

What should I do?

  1. Check your VIN to confirm your 2014-2017 Western Star truck is included in this recall.
  2. Contact a franchised Western Star dealer to schedule the free front axle hub replacement that addresses the hub capacity mismatch and wheel-separation risk.
  3. Bring the recall notice if you have it. If not, reference recall number 16V634 when you call.
  4. Avoid heavy front axle loads until the hubs are replaced.
  5. Call Western Star customer service at 1-800-547-0712 with questions about the free repair.

What happens at the repair

At the dealer, a Western Star technician replaces the front axle hubs covered by recall 16V634. The repair is available through authorized service facilities, and the replacement parts and labor are free under the recall. The service desk should confirm that the truck has the Conmet aluminum non high capacity hubs identified in the campaign, then replace the hubs before the truck returns to regular service. The source filing does not give a repair time, so plan the visit directly with the dealer.

Timeline

August 31, 2016 NHTSA published the recall
October 27, 2016 Dealer notification began
October 27, 2016 Dealer notification ended
October 27, 2016 Interim owner notification (was planned for this date)
November 1, 2016 Owner notification mailed

Frequently asked questions

What is recall 16V634?

Recall 16V634 covers 156 2014-2017 Western Star trucks with Conmet aluminum non-high capacity front axle hubs. The trucks list a front axle weight limit above the hub capacity, which can let a hub fail and allow a wheel to separate from the axle.

What should I do if my 2014-2017 Western Star 4800, 5700, 108SD, Cascadia, Coronado, Business Class M2, 114SD, or 4700 is on this recall?

Check your VIN to confirm your specific truck is included in recall 16V634. If it is, call a franchised Western Star dealer and ask for the front axle hub replacement. Reference recall number 16V634 and FL-718 when you schedule service.

Is the recall repair free?

Yes. Federal recall law requires the recall repair to be performed at no cost, and the remedy states that dealers will replace the front axle hubs free of charge. Parts and labor are covered at a franchised Western Star dealer.

What is the safety risk?

The safety risk is wheel separation. If the front axle hub fails, a wheel can separate from the axle, increasing the risk of a crash. The repair path is direct: the dealer replaces the affected front axle hubs for free.

What if I bought this truck used?

The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to confirm whether this specific truck is included, then contact a franchised Western Star dealer and reference recall 16V634 when you call.

More information

NHTSA campaign pagenhtsa.gov/vehicle-recalls/16V634000
Western Star customer service1-800-547-0712
NHTSA recall #16V634
NHTSA recall # (full)16V634000

Source documents

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 →