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Service bulletin BS3973E

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 id10110103
Published by NHTSA2017-08-03
Manufacturer's numberBS3973E
Manufacturer's date2017-05-12
NHTSA componentSERVICE BRAKES

NHTSA's summary

Valves balancing braking power needs to be updated to meet customer specifications.

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

Vehicles listed
NOVA BUS LFS2016

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

Recalls for the same vehicles and component
26V3550002026-06-02. SERVICE BRAKES, AIR:SUPPLY:LOW PRESSURE WARNING:SWITCH
20244252024-07-25. Brakes
24V5580002024-07-25. SERVICE BRAKES, AIR:DISC:CHAMBER
20182572018-05-14. Brakes
18V2990002018-05-07. SERVICE BRAKES, AIR:DISC:CALIPER

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
BS5119E2021-08-02. Service bulletin. Brake chambers may fail and cause the drive axle brakes to overheat
PC10202021-04-02. Service bulletin. brakes standard repair
LI4388ER12019-07-08. Service bulletin. Cummins code 1242 for throttle pedal sensor circuit
LI4462ER12019-07-08. Service bulletin. Cummins code 1242 for throttle pedal sensor circuit
LI4512E2019-01-07. Service bulletin. Brake wear signal reads 0% or fluctuates
BS4051ER32017-10-12. Service bulletin. Interlock brake is activated when the B-bus network is disconnected or lost.
LI4114E2017-09-14. Service bulletin. Articulation hydraulic cylinder pin is required to be maintained at W2 (60,000mi,100,000Km) maintenance of the articulation system to ease removal at a later time.
BS4051ER22017-08-16. Service bulletin. Interlock brake is activated when the B-bus network is disconnected or lost.
BS4051E2017-08-03. Service bulletin. Interlock brake is activated when the B-bus network is disconnected or lost