# Service bulletin SIB640423

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.

- Type: Service bulletin
- NHTSA id: 10236235
- Published by NHTSA: 2023\-05\-15
- Manufacturer's number: SIB640423
- Manufacturer's date: 2023\-04\-01
- NHTSA component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

## NHTSA's summary

A noise can briefly be heard from the front left of the engine compartment near the air conditioning refrigerant line. The noise can be heard in the passenger compartment with the hood closed.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10236235-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10236235-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Glass, wipers and mirrors, Heating and air conditioning

## Vehicles listed

- 2023 BMW 740I
- 2023 BMW 760I
- 2023 BMW I7

## Recalls for the same vehicles and component

- [2023519](/recalls/tc/2023519.md), 2023-09-21: Visual System
- [23V644000](/recalls/nhtsa/23V644000.md), 2023-09-20: VISIBILITY/WIPER

## Other bulletins for the same vehicles and component

- [B640124](/bulletins/10250603.md), 2024-03-02, Service bulletin: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; UNKNOWN OR OTHER. A drumming noise is heard when the air conditioning system is operating.
- [B510819](/bulletins/10249437.md), 2024-02-01, Service bulletin: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. The basic conditions for initializing the power windows are not met.
- [B612823](/bulletins/10245378.md), 2023-12-06, Service bulletin: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. A thumping sound is heard when the window reaches the closing end stop.
- [B510323](/bulletins/10233161.md), 2023-03-20, Service bulletin: VISIBILITY:WINDSHIELD. On the G70 vehicles, all panes are installed as laminated safety glass panes when SA 0356 Climate comfort laminated glass is ordered.

JSON: [/v1/bulletins/10236235](/v1/bulletins/10236235)

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