# Service bulletin B640324

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: 10249419
- Published by NHTSA: 2024\-02\-01
- Manufacturer's number: B640324
- Manufacturer's date: 2024\-01\-26
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

The coolant changeover valve may develop a coolant leak when the outside temperatures go below 19°F \(\-7°C\). The vehicles operating systems would also need to be at that same low temperature \(example: being parked outside, overnight in low temperatures\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249419-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249419-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2023 to 2024 BMW IX

## Other bulletins for the same vehicles and component

- [B170124](/bulletins/11029046.md), 2026-02-26, Service bulletin: ENGINE. There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” \(ID49\) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high\-voltage battery unit: Undervoltage or internal communication fault 8049AA \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 224111 \- Cooling system for power electronics: Coolant loss detected 224107 \- Cooling system for high\-voltage battery unit, component protection: Detection of coolant loss
- [B170124](/bulletins/11016419.md), 2025-04-03, Service bulletin: ENGINE. There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” \(ID49\) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high\-voltage battery unit: Undervoltage or internal communication fault 8049AA \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 224111 \- Cooling system for power electronics: Coolant loss detected 224107 \- Cooling system for high\-voltage battery unit, component protection: Detection of coolant loss
- [B170124](/bulletins/11014422.md), 2025-02-24, Service bulletin: ENGINE. There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” \(ID49\) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high\-voltage battery unit: Undervoltage or internal communication fault 8049AA \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 224111 \- Cooling system for power electronics: Coolant loss detected 224107 \- Cooling system for high\-voltage battery unit, component protection: Detection of coolant loss
- [B170124](/bulletins/11014035.md), 2025-02-10, Service bulletin: ENGINE. There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” \(ID49\) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high\-voltage battery unit: Undervoltage or internalcommunication fault 8049AA \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or linedisconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or linedisconnection 224111 \- Cooling system for power electronics: Coolant loss detected 224107 \- Cooling system for high\-voltage battery unit, component protection: Detection of coolantloss
- [B641324](/bulletins/11012094.md), 2024-12-31, Service campaign: ENGINE. Quality checks have determined that the coolant changeover valve may develop a coolant leak under verylow outside temperatures \(significantly lower than 32º F \(0 C\)\).
- [B640724](/bulletins/11005237.md), 2024-07-25, Service campaign: ENGINE. Quality checks have determined that the coolant changeover valve may develop a coolant leak under very low outside temperatures \(significantly lower than 32º F \(0 C\)\).
- [B640724](/bulletins/11000514.md), 2024-05-29, Service campaign: ENGINE. Quality checks have determined that the coolant changeover valve may develop a coolant leak under ver ylow outside temperatures \(significantly lower than 32º F \(0 C\)\).
- [B640324](/bulletins/11000511.md), 2024-05-29, Service bulletin: ENGINE. DELIVERY STOP: COOLANT CHANGEOVER VALVE
- [B170124](/bulletins/10253344.md), 2024-05-03, Service bulletin: ENGINE AND ENGINE COOLING. There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” \(ID49\) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high\-voltage battery unit: Undervoltage or internal communication fault 8049AA \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 \- Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 224111 \- Cooling system for power electronics: Coolant loss detected 224107 \- Cooling system for high\-voltage battery unit, component protection: Detection of coolant loss
- [B640324](/bulletins/10250368.md), 2024-03-02, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM; ELECTRICAL SYSTEM. The coolant changeover valve may develop a coolant leak when the outside temperatures go below 19°F \(\-7°C\). The vehicles operating systems would also need to be at that same low temperature \(example: being parked outside, overnight in low temperatures\).

JSON: [/v1/bulletins/10249419](/v1/bulletins/10249419)

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