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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11035095 |
| Published by NHTSA | 2026-07-20 |
| Manufacturer's number | 99-052 |
| Manufacturer's date | 2026-07-02 |
| NHTSA component | UNKNOWN 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.
| KENWORTH L770 | 2026 |
|---|---|
| KENWORTH T680 | 2026, 2027 |
| KENWORTH T880 | 2026 |
| KENWORTH W990 | 2026 |
| PETERBILT 520 | 2026 |
| PETERBILT 567 | 2026 |
| PETERBILT 579 | 2026, 2027 |
| PETERBILT 589 | 2026 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.