2003 BMW 325i Engine Specifications
The 2003 BMW 325i is part of the E46 generation, which is known for its balance of performance and luxury. The engine specifications are crucial for understanding the vehicle’s capabilities and maintenance needs. Below is a detailed overview of the engine specifications for the 2003 BMW 325i.
| Specification | Details |
|---|---|
| Engine Type | Inline-6 |
| Displacement | 2.5 liters (152 cubic inches) |
| Power Output | 184 horsepower at 6,000 RPM |
| Torque | 175 lb-ft at 3,500 RPM |
| Compression Ratio | 10.5:1 |
| Fuel System | Electronic fuel injection |
| Fuel Type | Premium unleaded (91 octane or higher) |
| Transmission Options | 5-speed manual, 5-speed automatic |
| Drivetrain | Rear-wheel drive (RWD) |
Engine Configuration
The engine configuration of the 2003 BMW 325i is designed to provide a smooth and responsive driving experience. The inline-6 engine layout is known for its balance and refinement, contributing to the vehicle’s overall performance.
Key Features of the Engine Configuration
- Inline-6 design provides smooth power delivery.
- Aluminum alloy construction for reduced weight and improved efficiency.
- Double overhead camshafts (DOHC) for better airflow and performance.
- Variable valve timing (VANOS) enhances engine efficiency and power across the RPM range.
Engine Oil Specifications
Proper engine oil selection and maintenance are vital for the longevity and performance of the 2003 BMW 325i. The right oil ensures optimal lubrication, cooling, and protection against wear.
Recommended Engine Oil
- Viscosity: 5W-30 or 10W-30
- Type: Synthetic or synthetic blend
- API Rating: API SN or higher
Oil Capacity
| Specification | Details |
|---|---|
| Oil Capacity (with filter) | 6.9 quarts (6.5 liters) |
| Oil Filter Type | BMW OEM filter or equivalent |
Service Intervals
Regular maintenance is essential for keeping the 2003 BMW 325i running smoothly. Adhering to service intervals helps prevent issues and prolongs the life of the vehicle.
Oil Change Intervals
- Every 7,500 miles (12,000 km) or 12 months, whichever comes first.
- More frequent changes may be necessary if driving in severe conditions (e.g., extreme temperatures, heavy traffic).
Other Maintenance Intervals
- Air Filter: Replace every 30,000 miles (48,000 km).
- Fuel Filter: Replace every 60,000 miles (96,000 km).
- Spark Plugs: Replace every 60,000 miles (96,000 km).
- Coolant: Flush and replace every 2 years.
Conclusion
The 2003 BMW 325i is a well-engineered vehicle that combines performance and luxury. Understanding its engine specifications, configuration, oil requirements, and service intervals is essential for maintaining its performance and reliability. Regular maintenance and using the recommended engine oil will ensure that this classic BMW continues to deliver an enjoyable driving experience for years to come.
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