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Service bulletins for the 2026 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.

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

By type

By component

Only bulletins with component: Steering are shown. Show all

Bulletins, newest first
24KWC/24PBC2026-08-20. Service bulletin. STEERING. Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
26PACA2026-06-03. Service bulletin. STEERING. Updated cross shaft and bearing installation steps have been added to the repair procedures.
46-0282026-06-03. Service campaign. STEERING. Certain Peterbilt Model 520 BEV chassis with an Accelera Power Control and Accessory System (PCAS) were manufactured without a check valve in the power steering system.
15-0342026-03-05. Service campaign. STEERING. Battery Electric Vehicle (BEV) de-energizing and re-energizing procedures have been added to the bulletin for Peterbilt Model 520 BEV.
26PACA2026-02-18. Service campaign. STEERING. KW: Certain Kenworth L770 chassis may have Right-Hand (RH) steering cross shaft bearing mounting holes that are misaligned, resulting in increased stress on the steering cross shaft on the Right-Hand Stand-Up (RHSU) controls configuration. Failure of the RH steering cross shaft could result in the loss of RH steering control which may increase the risk of a crash. PB: Certain Peterbilt Model 520 / 520 BEV chassis may have Right-Hand (RH) steering cross shaft bearing mounting holes that are misaligned, resulting in increased stress on the steering cross shaft on the Right-Hand Stand-Up (RHSU) controls configuration. Failure of the RH steering cross shaft could result in the loss of RH steering control which may increase the risk of a crash.
15-0342026-01-06. Service bulletin. STEERING. Certain Kenworth L770 and Peterbilt Model 520 chassis may encounter a slight increase in effort in the right-hand steering shaft when turning the wheel.

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