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Service bulletins for the 2020 Peterbilt 520

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

52 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Steering are shown. Show all

Bulletins, newest first
20PBD2020-09-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; STEERING; EQUIPMENT. Safety Recall: Model 520 vehicles with Right-Hand Stand-Up (“RHSU”) configuration built between February 15, 2019 and December 20, 2019 may have incorrect steering assist cylinder bracket bolts installed, which prevents proper retention of these bolts.The steering assist cylinder bracket attached to the right front spring bracket with these bolts may also be damaged. The bolts installed may not have the required thread lock and this could result in loose or missing hardware. This may cause the bracket to flex or break and cause damage to adjacent components or lock up steering. Resolution is to remove and reinstall the steering gear assist bracket bolts with thread locker.
19PBF2020-04-03. Service bulletin. STEERING. Safety Recall: Peterbilt Motors Company has decided a defect, which relates to motor vehicle safety, may exist in certain Model 520 vehicles with Right Hand Stand Up (RHSU) configuration built between June 15, 2018 and February 14, 2019. Vehicles may have an improperly supported steering gear assist bracket due to the incorrect spring bracket installed. The spring bracket may be missing 3 drilled and tapped holes which will provide additional support for the steering gear assist bracket. An improperly supported steering gear assist cylinder bracket may break and cause damage to surrounding components and/or lock up the steering, increasing the risk of a crash. Resolution is to inspect and verify the steering assist bracket is installed with 5 required bolts. If 5 bolts are not installed, a new bracket will be installed.
19PBF2020-02-05. Service bulletin. STEERING. Safety Related Campaign - Interim Notification: Peterbilt Motors Company has decided a defect, which relates to motor vehicle safety, may exist in certain Model 520 vehicles with Right Hand Stand Up (RHSU) configuration built between June 15, 2018 and February 14, 2019. Vehicles may have an improperly supported steering gear assist bracket due to the incorrect spring bracket installed. The spring bracket may be missing 3 drilled and tapped holes which will provide additional support for the steering gear assist bracket. An improperly supported steering gear assist bracket may flex or break and cause damage to other components or cause the steering to lock up. This bulletin will be updated as soon as parts become available for the repair.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.