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Service bulletin SB4934

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 id10192960
Published by NHTSA2021-05-10
Manufacturer's numberSB4934
Manufacturer's date2014-02-01
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

DEF Tank Coolant Valve O-Ring Kit

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

Vehicles listed
FREIGHTLINER 108SD2000
FREIGHTLINER 108SD2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
FREIGHTLINER 114SD2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
FREIGHTLINER 122SD2004 to 2022
FREIGHTLINER CORONADO2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER M22004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021

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

Recalls for the same vehicles and component
20204082020-09-01. Engine
20V5270002020-09-01. ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING
18V5810002018-08-30. ENGINE AND ENGINE COOLING:ENGINE:DIESEL
15V6200002015-10-02. ELECTRICAL SYSTEM:IGNITION:MODULE; ENGINE AND ENGINE COOLING:ENGINE
20153362015-07-24. Engine
15V3430002015-06-03. ENGINE AND ENGINE COOLING:ENGINE
14V6800002014-10-29. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
20140502014-02-21. Engine
14V0800002014-02-21. ENGINE AND ENGINE COOLING:ENGINE
12V0740002012-02-28. 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.

Other bulletins for the same vehicles and component
CXA 03_26_Surge Tank2026-04-02. Other. CX Advocate for discolored coolant surge tanks (24CSA-20)
FleetCom_Heater Core2026-01-08. Other. Fleet Communications for Heater Core Plugging
TSB54-377-FTL2026-01-07. Service bulletin. Technical Service Bulletin Low Coolant Sensor
CXA_10_25_Conmet Oil Pan2025-11-05. Other. CX Advocate for ConMet Oil Pan Insert Additional Issues
24CSA-19Rev2025-09-02. Other. Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks
CXA 3_25_NOx2025-04-02. Other. CX Advocate for NOx conversion low faults
CXA 2_25_Turbo Oil Drain2025-03-04. Other. CX Advocate for turbo oil drain cracking
CXA 2_25_NOx2025-03-04. Other. CX Advocate for NOx conversion low faults
TSB01-002-DDC2025-03-04. Service bulletin. Technical Service Bulletin for Gen 5 DD13 Turbocharger Oil Return Line Cracks
CXA 1_16_Turbo Oil Drain2025-01-29. Other. CX Advocate for turbo oil drain cracking