# 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 bulletins from NHTSA, as of 2026-10-19. - [BS5571E](/bulletins/10253694.md), 2024-04-30, Service bulletin: ENGINE AND ENGINE COOLING. The HVAC generator engine pulley has bolts that are too long. - [BS5578E](/bulletins/10253693.md), 2024-04-30, Service bulletin: STRUCTURE. The rear door operator is missing one bolt and washer. - [BS5580E](/bulletins/10253692.md), 2024-04-30, 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. - [FT5575E](/bulletins/10253691.md), 2024-04-30, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE. Rear Door Electrical Operator. Incorrectly adjusted door stops could mislead the system by indicating incomplete closure of the door. - [BS5572E](/bulletins/10252145.md), 2024-03-29, Service bulletin: ENGINE AND ENGINE COOLING; UNKNOWN OR OTHER. Water Sensor in E\-Steering Compartment. - [BS5572E](/bulletins/10252144.md), 2024-03-29, Service bulletin: UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING. Water Sensor in E\-Steering Compartment. - [BS5438E](/bulletins/10252143.md), 2024-03-29, 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. - [BS5562E](/bulletins/10252142.md), 2024-03-29, 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. - [BS5561E](/bulletins/10252141.md), 2024-03-29, Service bulletin: ELECTRICAL SYSTEM. Non\-conforming Exterior speakers. - [FT5567](/bulletins/10252140.md), 2024-03-29, Service bulletin: ELECTRICAL SYSTEM. Battery Unbalanced Light Logic with AGM Battery. - [FT5545](/bulletins/10252138.md), 2024-03-29, 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. - [BS5551E](/bulletins/10251117.md), 2024-03-04, Service bulletin: EXTERIOR LIGHTING. Headlight bezel adjustment screw may interfere with HIVIS frame. - [FT5554](/bulletins/10251113.md), 2024-03-04, Service bulletin: ENGINE AND ENGINE COOLING. The Cabin Coolant Level Sensors for the LOW and HIGH levels are swapped. - [BS5559E](/bulletins/10250592.md), 2024-02-24, Service bulletin: ELECTRICAL SYSTEM. Power cable needs blue heat shrink to indicate live power all the time. Connect cable to the correct location. - [BS5506E](/bulletins/10250591.md), 2024-02-24, Service bulletin: ELECTRICAL SYSTEM. Battery door slam latch, due to a shortage, N620000263 was installed as an alternative to temporarily replace N81288. - [BS5450E](/bulletins/10250589.md), 2024-02-24, Service bulletin: ELECTRICAL SYSTEM. LED strip \(N105390\) was installed without seals in the plug. - [FT5531R1](/bulletins/10250588.md), 2024-02-24, Service bulletin: ENGINE AND ENGINE COOLING. Oil level creating different issues, Cummins recommendation following few parts issues. - [FT5539](/bulletins/10250584.md), 2024-02-24, Service bulletin: ENGINE AND ENGINE COOLING. Buses logging cabin and engine coolant pressure codes as reported by Clever Device. - [FT5534](/bulletins/10249471.md), 2024-02-01, Service bulletin: ELECTRICAL SYSTEM. The ground of the IVN unit \(Intelligent Vehicle Network\) could be connected to the wrong place. - [FT5547](/bulletins/10249457.md), 2024-01-31, Service bulletin: ELECTRICAL SYSTEM. Alternator cable hardware may loosen in service cause by an assembly fault in production. - [BS5532E](/bulletins/10249456.md), 2024-01-31, Service bulletin: ENGINE AND ENGINE COOLING. Grid heater cable loose due to workmanship issues. - [FT5531](/bulletins/10249455.md), 2024-01-31, Service bulletin: ENGINE AND ENGINE COOLING. Oil level creating different issues in service. Cummins recommendation following few parts issues in service. - [BS5490E](/bulletins/10249039.md), 2024-01-20, Service bulletin: ENGINE AND ENGINE COOLING. Fuse holder for the electric cooling fans require an improve protection against road debris. - [FT5509](/bulletins/10248056.md), 2024-01-02, 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. - [FT5517](/bulletins/10247630.md), 2023-12-23, Service bulletin: ENGINE AND ENGINE COOLING. Grid heater cable loose due to workmanship issues. 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