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Service bulletins for the 2021 Freightliner Coronado

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.

30 on file from NHTSA, as of 2026-10-19.

By type

By component

Bulletins, newest first
CXA 2_25_Turbo Oil Drain2025-03-04. Other. ENGINE. CX Advocate for turbo oil drain cracking
CXA 1_16_Turbo Oil Drain2025-01-29. Other. ENGINE. CX Advocate for turbo oil drain cracking
CXA 1_16_GATS2.42025-01-29. Other. ENGINE. CX Advocate for GATS2.4 being expanding to DD15
CXA 1_16_DD13 Altitude2025-01-29. Other. ENGINE. CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
VSWP Customer Letter2024-06-22. Other. ENGINE. Customer letter regarding variable speed water pump.
ICI23-0102023-04-07. Service bulletin. STEERING. Important Campaign Information letter communicating that SF660 Field Service Campaign is Replaced by FL967.
SF660A2023-02-04. Service bulletin. STEERING. Revised Field Service Campaign for Drag Link Tapered Joint
SF6602023-01-06. Service bulletin. STEERING. Field Service Campaign for Drag Link Tapered Joint
SB49-0422022-03-03. Service bulletin. ENGINE AND ENGINE COOLING. Freightliner Service Bulletin for DEF Connector Reinforcement Caps.
SF6132021-11-03. Service bulletin. SERVICE BRAKES, HYDRAULIC. ConMet Front Hub to Rotor Fasteners. On certain vehicles, the front rotor nuts may not be torqued to manufacturer specification. Loose components could cause damage to the ABS tone rings, the ABS sensors, and the anchor plate mounting fasteners.
CALFTL31-0042021-06-26. Service bulletin. WHEELS. Customer Advisory Letter for 4-Hook Chain Hanger Replacement.
SS10329742021-06-09. Service bulletin. UNKNOWN OR OTHER. SS 1032974 High Oil Pressure on 2017 DTNA Vehicles Instrument Cluster Display
SS10330942021-06-09. Service bulletin. FUEL SYSTEM, GASOLINE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:MANIFOLD PRESSURE (MAP) SENSOR. Service Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform...
SB831332021-05-10. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. New H02 and H03 A/C lines.
SB49342021-05-10. Service bulletin. ENGINE AND ENGINE COOLING. DEF Tank Coolant Valve O-Ring Kit
SB54-3202021-05-03. Service bulletin. ELECTRICAL SYSTEM. Updated Service Bulletin for upgrading BHM software for switch expansion module fault SPN 698 FMI 7. This bulletin replaces the version dated 11/11/2019. Figure 3 has been updated with a new hardware part number. A procedure was added to the data download process.
SB35-0362020-12-30. Service bulletin. POWER TRAIN. Revised Freightliner Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Revision removed steps instructing removal and installation of wheels. Daimler Trucks North America has released a new axle shaft to hub rubber O-ring (part number 11-30728-000) as a replacement for the paper gasket (part number 11-14418-000). The new O-ring will provide better sealing and is reusable. It is quicker and easier to use compared to the paper gasket, because using a paper gasket requires cleaning the hub when the axle shaft is removed.
SB54-2782020-10-28. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Updated Freightliner Service Bulletin for Powernet Troubleshooting Guide - Batteries, Path, Alternator, and Starter. This bulletin replaces the version dated 5/31/2017. Information is added about the BCT-460DTNA PowerNet Assessment Tool. When troubleshooting Powernet issues, use the BCT-460DTNA PowerNet Assessment Tool. As of May 29, 2018, the AutoMeter® is the only Daimler-approved tool for troubleshooting vehicle Powernet issues.
SB35-0362020-10-12. Service bulletin. EQUIPMENT; POWER TRAIN. Freightliner Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Daimler Trucks North America has released a new axle shaft to hub rubber O-ring (part number 11-30728-000) as a replacement for the paper gasket (part number 11-14418-000). The new O-ring will provide better sealing and is reusable. It is quicker and easier to use compared to the paper gasket, because using a paper gasket requires cleaning the hub when the axle shaft is removed.
TechTalk76792020-10-01. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on repair verification for codes like 'low air flow' when a trailer is not available.
CONMET DISC BRAK2020-09-16. Service bulletin. SERVICE BRAKES, HYDRAULIC. ConMet Disc Brake Communication for vehicles with flat rotor disc brakes with aluminum hubs may have rotor mounting studs fracture due to hydrogen embrittlement. A hold has been placed on vehicles at plants and facilities to inspect before releasing for delivery.
CONMET HUB COMMU2020-09-16. Service bulletin. SERVICE BRAKES, HYDRAULIC. ConMet Hub Communication on rotor mounting studs installed on steer and drive hubs on vehicles with flat rotors may fracture due to hydrogen embrittlement. Inspection of vehicles may delay delivery of vehicles.
CONMET FLAT ROTO2020-09-16. Service bulletin. SERVICE BRAKES, HYDRAULIC. ConMet Work Instructions for Inspection of ConMet Disc Brake Rotor to Hub Fastener. Please see the attached instructions on inspecting the ConMet disc brake rotor to hub fastener. Rotor mounting studs installed on steer and drive hubs on vehicles with flat rotors may fracture due to hydrogen embrittlement.
CALFTL35-0012020-09-16. Service bulletin. SERVICE BRAKES, HYDRAULIC. Customer Advisory Letter for Inspection of ConMet Disc Brake Rotor to Hub Fastener. Our records indicate that you are the owner of certain vehicles and therefore DTNA is sharing the following documentation with you. Please see the attached instructions on inspecting the ConMet disc brake rotor to hub fastener.
TS10330142020-07-31. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP; ENGINE AND ENGINE COOLING. Training Solutions for Fuel Leak Found at High Pressure Fuel Pump Weep Hole for Heavy Duty DD Engines. Occasionally we see trucks come in with fuel leaking from the high pressure fuel pump weep hole. This is NOT a defect in the pump and further diagnostics need to be performed to find the root cause.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.