How did Borgwarner's revenue and expenses shift in Q4 2024?

Borgwarner's revenue and expenses in Q4 2024 showed a notable shift, with a significant decline in net income accompanied by varying trends in revenue segments.

1. **Revenue Segments Analysis**:
- **Turbos & Thermal Technologies**: Contributed $5.89 billion, highlighting its strong performance.
- **Drivetrain & Morse Systems**: Generated $5.58 billion, indicating a robust segment.
- **Battery & Charging Systems**: Reported $729 million and $567 million in revenue, showing growth in this segment.

|code|Ticker|Name|Date|Business Composition|Revenue By Business|market_code|
|---|---|---|---|---|---|---|
|BWA|BWA.N|Borgwarner|20240101-2024|Inter-Segment Eliminations|-4.4E7|169|
|BWA|BWA.N|Borgwarner|20240101-2024|Inter-Segment Eliminations|-3.3E7|169|
|BWA|BWA.N|Borgwarner|20240101-2024|Inter-Segment Eliminations|-6.1E7|169|
|BWA|BWA.N|Borgwarner|20240101-2024|Inter-Segment Eliminations|-3.0E7|169|
|BWA|BWA.N|Borgwarner|20240101-2024|Epropulsion|4.36E8|169|
|BWA|BWA.N|Borgwarner|20240101-2024|Inter-Segment Eliminations|-3.0E7|169|
|BWA|BWA.N|Borgwarner|20240101-2024|Drivetrain & Battery Systems|1.159E9|169|
|BWA|BWA.N|Borgwarner|20240101-2024|Engine|2.03E9|169|

2. **Net Income and Gross Margin**:
- Borgwarner experienced a **net loss of $388 million** in Q4 2024, primarily due to a **gross margin of 18.8%**, which suggests that despite revenue growth in certain segments, the company faced significant cost challenges, leading to a negative net income.

The data indicates that while Borgwarner's revenue streams are diverse and robust in terms of revenue generation, particularly in Turbos & Thermal Technologies and Drivetrain & Morse Systems, the company's net profitability was negatively impacted by factors such as operational costs, likely related to the Battery & Charging Systems segment, which showed the least revenue among the business segments.