The air conditioning cycles from cold to warm air while driving or while at a stand still
BMW technical service bulletin SIB640821 for 2019-2023 BMW X7, 2000-2022 BMW X6 and 2017-2021 BMW M550I and others.
- Bulletin number
- SIB640821
- Component
- Visibility: defroster/defogger/HVAC system
- Summary
- The air conditioning cycles from cold to warm air while driving or while at a stand still. The vent outlet temperatures vary by 25 degrees Fahrenheit or more (38 F to 60 F +) without changing any climate control settings. In some cases the air conditioning may have stopped blowing cold air altogether.
Owners of these vehicles have filed 12 complaints in the visibility category.
Vehicles covered
- BMW X7 2019-2023 20192020202120222023
- BMW X6 2000-2022 20152016201720182019202020212022
- BMW M550I 2017-2021 20172018201920202021
- BMW 640I 2012-2020 20132014201520162017201820192020
- BMW 840I 2019-2022 2019202020212022
- BMW M8 2019-2022 2019202020212022
- BMW X6 M 2008-2012, 2015-2020 20112012201520162017201820192020
- BMW M850I 2018-2021 2018201920202021
- BMW M760I 2017-2021 20172018201920202021
- BMW M8 Gran Coupe 2020 2020
- BMW Alpina Xb7 2021-2023 202120222023
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