Service bulletin D21M6REV1
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 | 10207303 |
| Published by NHTSA | 2022-02-05 |
| Manufacturer's number | D21M6REV1 |
| Manufacturer's date | 2022-01-26 |
| NHTSA component | ENGINE AND ENGINE COOLING |
NHTSA's summary
Gen 5 Customer Demo Unit (CDU) and Pre-Series Unit Retrofits. Specific 2021 Freightliner New Cascadia model vehicles, powered with DETROIT Gen 5 DD15 Engines manufactured February 3, 2020, through December 14, 2020
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.
Components
Engine
| FREIGHTLINER CASCADIA | 2021 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 21V073000 | 2021-02-12. ENGINE |
|---|
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| FleetCom_Heater Core | 2026-01-08. Other. Fleet Communications for Heater Core Plugging |
|---|---|
| FleetCom_SS 3163-FTL | 2025-12-06. Other. Fleet Communications for Power Steering Reservoir Fill Cap Venting |
| FleetCom_Low Coolant | 2025-12-05. Other. Fleet Communications for Low Coolant Sensor |
| CXA_10_25_Low Coolant | 2025-11-05. Other. CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings |
| CXA_10_25_Conmet Oil Pan | 2025-11-05. Other. CX Advocate for ConMet Oil Pan Insert Additional Issues |
| CXA_9_25_Tech Questions | 2025-10-03. Other. CX Advocate for technical questions/issues raised |
| CXA_8_25_Tech Questions | 2025-09-02. Other. CX Advocate for technical questions/issues raised |
| CXA 3_25_NOx | 2025-04-02. Other. CX Advocate for NOx conversion low faults |
| CXA 2_25_Turbo Oil Drain | 2025-03-04. Other. CX Advocate for turbo oil drain cracking |
| CXA 2_25_NOx | 2025-03-04. Other. CX Advocate for NOx conversion low faults |