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Service bulletin 326-15

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 id10141952
Published by NHTSA2018-06-18
Manufacturer's number326-15
Manufacturer's date2015-03-26
NHTSA componentEQUIPMENT; ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:WHEEL SPEED SENSOR/TONE RING; EQUIPMENT:ELECTRICAL

NHTSA's summary

326-15 Main Shaft Speed Sensor

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

Brakes, Electrical system, Equipment and accessories, Anti-lock brakes, Wheel speed sensor

Vehicles listed
FREIGHTLINER 114SD2012, 2013, 2014, 2015, 2016, 2017
FREIGHTLINER 122SD2012 to 2017
FREIGHTLINER BUSINESS CLASS M22012 to 2017
FREIGHTLINER CASCADIA2012, 2013, 2014, 2015, 2016, 2017
FREIGHTLINER COLUMBIA2012, 2013, 2014, 2015, 2016, 2017
FREIGHTLINER CORONADO2012, 2013, 2014, 2015, 2016, 2017
WESTERN STAR 47002012, 2013, 2014, 2015, 2016, 2017
WESTERN STAR 49002012, 2013, 2014, 2015, 2016, 2017

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

Recalls for the same vehicles and component
23V0730002023-02-10. ELECTRONIC STABILITY CONTROL (ESC); SERVICE BRAKES, AIR:ANTILOCK:MODULATOR
22V8170002022-11-01. SERVICE BRAKES, AIR:ANTILOCK:MODULATOR; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
14V5270002014-09-03. SERVICE BRAKES, AIR:ANTILOCK

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
CALFTL54-010REV32021-03-26. Service bulletin. Revised Customer Advisory Letter for ABS Warning Light Illumination with ABS code SA 11, SPN 629, FMI 11. REVISED: This CAL revises the CAL issued August 10th, 2020. Western Star 49X vehicles have been added to the CAL scope and instructions for downloading and installing software to address the ABS warning light illumination with ABS code SA 11, SPN 629, FMI 11 have replaced the corrective action of the previous CAL.
CALFTL54-010REV2020-09-01. Service bulletin. Revised Customer Advisory Letter for New Cascadia ABS Warning Light Illumination work instructions. Due to the enhanced vigilance of the New Cascadia ABS controller, some fault codes and indicator lights do not necessarily require immediate maintenance attention. DTNA and WABCO are currently jointly working on a long-term corrective plan for the condition. REVISED: This CAL replaces the CAL issued June 17th, 2020. The phrase "if equipped" in reference to cab load disconnect switches has been removed.
CALFTL54-0102020-06-26. Service bulletin. Customer Advisory Letter for New Cascadia ABS Warning Light Illumination work instructions. Due to the enhanced vigilance of the New Cascadia ABS controller, some fault codes and indicator lights do not necessarily require immediate maintenance attention. DTNA and WABCO are currently jointly working on a long-term corrective plan for the condition.
FL7992019-04-01. Service bulletin. Honeywell Brake Light Pressure Switches Recall Bulletin
603-132018-06-18. Service bulletin. 603-13 SPN 84 -FMI 6 - EPA07-GHG14
13TS72018-06-11. Service bulletin. 13TS7 GHG14 CPC4 Vehicle Speed Sensor Code SPN 84-FMI 6
102-132018-06-11. Service bulletin. 102-13 SPN 84-FMI 13, 19, 21 (MCM) EPA10-GHG14
DOC-10333222018-06-11. Service bulletin. SS 1033322 ABS light illuminating in ICU, ABS solenoids will not self-check
326-152018-03-05. Service bulletin. 326-15 Main Shaft Speed Sensor