Service bulletin 20TS-03REV2
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 | 10180503 |
| Published by NHTSA | 2020-10-01 |
| Manufacturer's number | 20TS-03REV2 |
| Manufacturer's date | 2020-09-29 |
| NHTSA component | ENGINE AND ENGINE COOLING |
NHTSA's summary
Revised Technical Service Letter for DD Heavy Duty Platform Belt Tensioner Change. A newly designed, dual-arm friction shoe damping tensioner was implemented for the DD Heavy Duty Platform. The revision includes additional information on retrofit and service kits.
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 114SD | 2018, 2019, 2020, 2021 |
|---|---|
| FREIGHTLINER 122SD | 2018 to 2021 |
| FREIGHTLINER BUSINESS CLASS M2 | 2018 to 2021 |
| FREIGHTLINER CASCADIA | 2018, 2019, 2020, 2021 |
| WESTERN STAR 4700 | 2018, 2019, 2020, 2021 |
| WESTERN STAR 4800 | 2018, 2019, 2020, 2021 |
| WESTERN STAR 4900 | 2018, 2019, 2020, 2021 |
| WESTERN STAR 5700 | 2018, 2019, 2020, 2021 |
| WESTERN STAR 6900 | 2018, 2019, 2020, 2021 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 21V073000 | 2021-02-12. ENGINE |
|---|---|
| 2020408 | 2020-09-01. Engine |
| 20V527000 | 2020-09-01. ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING |
| 18V581000 | 2018-08-30. ENGINE AND ENGINE COOLING:ENGINE:DIESEL |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| CXA 03_26_Surge Tank | 2026-04-02. Other. CX Advocate for discolored coolant surge tanks (24CSA-20) |
|---|---|
| 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 |
| 24CSA-19Rev | 2025-09-02. Other. Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks |
| CXA 3_25_NOx | 2025-04-02. Other. CX Advocate for NOx conversion low faults |