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Service bulletin 99-052

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11035095
Published by NHTSA2026-07-20
Manufacturer's number99-052
Manufacturer's date2026-07-02
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

There is an update to the Base Emissions Warranty Limits table [PR1.1]and general certification information in certain Engine Model Year (EMY) 2026 MX-11 and MX-13 Operator’s Manuals.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Vehicles listed
KENWORTH L7702026
KENWORTH T6802026, 2027
KENWORTH T8802026
KENWORTH W9902026
PETERBILT 5202026
PETERBILT 5672026
PETERBILT 5792026, 2027
PETERBILT 5892026

Listing a model year does not mean every vehicle of it is concerned: the document says which.