WenmarOpen by Wenmar Pro

Service bulletins for the 2023 NovaBUS LFS

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.

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

By type

By component

Bulletins, newest first
BS5571E2024-04-30. Service bulletin. ENGINE AND ENGINE COOLING. The HVAC generator engine pulley has bolts that are too long.
BS5578E2024-04-30. Service bulletin. STRUCTURE. The rear door operator is missing one bolt and washer.
BS5580E2024-04-30. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. One fire suppression system pipe may be installed backwards and interfere with an alternator cable, creating friction that could damage one or both components.
FT5575E2024-04-30. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE. Rear Door Electrical Operator. Incorrectly adjusted door stops could mislead the system by indicating incomplete closure of the door.
BS5572E2024-03-29. Service bulletin. ENGINE AND ENGINE COOLING; UNKNOWN OR OTHER. Water Sensor in E-Steering Compartment.
BS5572E2024-03-29. Service bulletin. UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING. Water Sensor in E-Steering Compartment.
BS5438E2024-03-29. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM:PROPULSION SYSTEM: CABLES:FASTENER/CONNECTOR; POWER TRAIN. Restricted access to the Modular Propulsion Control System (MPCS) makes decommissioning difficult and presents a risk of damaging the HV cables during handling or testing.
BS5562E2024-03-29. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT. The transmission oil sampler line might be routed above the transmission oil dipstick tube, bringing it too close to the turbo. Heat from the turbo can damage the sample line.
BS5561E2024-03-29. Service bulletin. ELECTRICAL SYSTEM. Non-conforming Exterior speakers.
FT55672024-03-29. Service bulletin. ELECTRICAL SYSTEM. Battery Unbalanced Light Logic with AGM Battery.
FT55452024-03-29. Service bulletin. STRUCTURE; VISIBILITY. The Driver’s Barrier stationary glass is breaking in service due to possible metal to glass contact on the lower supports.
BS5551E2024-03-04. Service bulletin. EXTERIOR LIGHTING. Headlight bezel adjustment screw may interfere with HIVIS frame.
FT55542024-03-04. Service bulletin. ENGINE AND ENGINE COOLING. The Cabin Coolant Level Sensors for the LOW and HIGH levels are swapped.
BS5559E2024-02-24. Service bulletin. ELECTRICAL SYSTEM. Power cable needs blue heat shrink to indicate live power all the time. Connect cable to the correct location.
BS5506E2024-02-24. Service bulletin. ELECTRICAL SYSTEM. Battery door slam latch, due to a shortage, N620000263 was installed as an alternative to temporarily replace N81288.
BS5450E2024-02-24. Service bulletin. ELECTRICAL SYSTEM. LED strip (N105390) was installed without seals in the plug.
FT5531R12024-02-24. Service bulletin. ENGINE AND ENGINE COOLING. Oil level creating different issues, Cummins recommendation following few parts issues.
FT55392024-02-24. Service bulletin. ENGINE AND ENGINE COOLING. Buses logging cabin and engine coolant pressure codes as reported by Clever Device.
FT55342024-02-01. Service bulletin. ELECTRICAL SYSTEM. The ground of the IVN unit (Intelligent Vehicle Network) could be connected to the wrong place.
FT55472024-01-31. Service bulletin. ELECTRICAL SYSTEM. Alternator cable hardware may loosen in service cause by an assembly fault in production.
BS5532E2024-01-31. Service bulletin. ENGINE AND ENGINE COOLING. Grid heater cable loose due to workmanship issues.
FT55312024-01-31. Service bulletin. ENGINE AND ENGINE COOLING. Oil level creating different issues in service. Cummins recommendation following few parts issues in service.
BS5490E2024-01-20. Service bulletin. ENGINE AND ENGINE COOLING. Fuse holder for the electric cooling fans require an improve protection against road debris.
FT55092024-01-02. Service bulletin. STRUCTURE; VISIBILITY:GLASS, SIDE/REAR. The Driver’s Barrier stationary glass is breaking in service due to possible metal to glass contact on the lower supports. The glass must have a minimum of 3mm gap all around the supports.
FT55172023-12-23. Service bulletin. ENGINE AND ENGINE COOLING. Grid heater cable loose due to workmanship issues.

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