Overview of the BMW N47 Engine
The BMW N47 engine is a 2.0-liter inline four-cylinder diesel engine that has garnered attention for its blend of performance and efficiency. Introduced in 2007, this engine was part of BMW’s new generation of diesel powerplants, designed to meet the growing demand for fuel-efficient and environmentally friendly vehicles. The N47 engine employs common rail direct injection technology, enabling precise control of fuel delivery and improving combustion efficiency. This results in impressive torque delivery across a broad range of RPMs, making it a popular choice for various BMW models.
One of the standout features of the N47 engine is its compact design, which allows for a lightweight build without sacrificing structural integrity. The engine block is made from cast iron, contributing to its durability, while the aluminum cylinder head helps reduce overall weight. This combination not only enhances performance but also contributes to better fuel economy, which is a significant consideration for modern consumers.
The N47 engine is equipped with a variable geometry turbocharger, which optimizes power output and responsiveness, especially at lower RPMs. This technology allows for a more dynamic driving experience, appealing to both enthusiasts and everyday drivers. The engine is also designed to meet Euro 5 emissions standards, showcasing BMW’s commitment to reducing environmental impact without compromising on performance.
Applications in BMW Models
The N47 engine has been utilized in a variety of BMW models across different segments, highlighting its versatility and adaptability. Here’s a list of some notable vehicles that feature this engine:
- BMW 1 Series: Used in models like the 114d and 116d, the N47 engine provides a balance of power and efficiency in this compact hatchback.
- BMW 3 Series: Found in the 316d and 318d variants, the N47 engine enhances the driving experience of this popular sedan.
- BMW 5 Series: The 520d model benefits from the engine’s performance characteristics, making it an excellent choice for business and luxury travel.
- BMW X1: In this compact SUV, the N47 engine offers a blend of practicality and driving pleasure, appealing to families and adventure seekers alike.
- BMW X3: The 2.0-liter diesel engine is also featured in the X3, providing ample power for both urban commuting and off-road excursions.
- BMW 6 Series: Certain models like the 620d utilize the N47 engine, delivering a sporty yet refined driving experience.
Overall, the BMW N47 engine represents a significant advancement in diesel technology, appealing to a wide range of drivers who prioritize both performance and efficiency. Its application across various models demonstrates BMW’s commitment to providing a diverse lineup that meets the needs of different consumers while maintaining the brand’s signature driving dynamics.
Specifications of the BMW N47 Engine
The BMW N47 engine is designed to deliver robust performance while maintaining fuel efficiency. The following specifications provide a detailed overview of its capabilities and features.
General Engine Specifications
| Specification | Details |
|---|---|
| Engine Type | Inline 4-cylinder, Diesel |
| Displacement | 1995 cc |
| Fuel System | Common Rail Direct Injection |
| Turbocharger | Variable Geometry Turbocharger |
| Maximum Power | 143 hp (105 kW) @ 4000 RPM |
| Maximum Torque | 320 Nm @ 1750-2500 RPM |
| Compression Ratio | 16.5:1 |
| Fuel Type | Diesel (EN590) |
Performance Specifications
| Specification | Details |
|---|---|
| 0-100 km/h (0-62 mph) | 8.5 seconds (approx.) |
| Top Speed | 210 km/h (130 mph) |
| Fuel Economy (Combined) | 4.5 – 5.5 L/100 km (approx.) |
| CO2 Emissions | 120-140 g/km (approx.) |
Oil Capacity and Recommendations
| Specification | Details |
|---|---|
| Oil Capacity (with filter) | 5.5 liters |
| Recommended Oil Type | 5W-30 or 5W-40 Synthetic Oil |
| Oil Change Interval | 15,000 km or 12 months (whichever comes first) |
The specifications of the BMW N47 engine illustrate its engineering excellence. With a strong focus on performance, efficiency, and environmental compliance, this engine has become a staple in BMW’s lineup of diesel offerings. The careful balance of power and torque ensures a dynamic driving experience, while the recommended oil specifications support the engine’s longevity and reliability.
Common Problems and Reliability of the BMW N47 Engine
The BMW N47 engine, while generally regarded as a solid performer, is not without its share of issues. Understanding these common problems can help owners maintain their vehicles and avoid costly repairs down the line.
Common Issues
Despite its engineering prowess, the N47 engine has been associated with several notable problems:
1. Timing Chain Failure
One of the most serious issues reported with the N47 engine is timing chain failure. This problem can lead to catastrophic engine damage if not addressed promptly. Key points include:
– Symptoms: Rattling noises from the engine, especially during cold starts.
– Causes: Poor lubrication and wear over time can contribute to chain stretch and eventual failure.
– Prevention: Regular oil changes and using high-quality oil can help mitigate this risk.
2. Turbocharger Problems
The variable geometry turbocharger is a hallmark of the N47 engine’s performance, but it can also be a source of trouble:
– Symptoms: Loss of power, increased exhaust smoke, and unusual noises.
– Causes: Carbon build-up and oil contamination can impair turbo function.
– Prevention: Regular maintenance and using the correct oil can help keep the turbo in good condition.
3. EGR Valve Issues
The exhaust gas recirculation (EGR) system can sometimes malfunction:
– Symptoms: Rough idling, increased emissions, and warning lights on the dashboard.
– Causes: Carbon deposits can clog the EGR valve, leading to improper operation.
– Prevention: Regular cleaning and inspections can help maintain EGR functionality.
4. Fuel Injector Problems
Fuel injectors in the N47 engine are crucial for optimal performance, but they can fail:
– Symptoms: Poor fuel economy, rough running, and engine misfires.
– Causes: Contaminated fuel and wear over time can lead to injector failure.
– Prevention: Using high-quality fuel and regular maintenance checks can help extend injector life.
Reliability Factors
When it comes to reliability, the N47 engine has its strengths and weaknesses. Here are some factors to consider:
- Build Quality: Generally well-engineered, the N47 engine is built to last, but the timing chain issue can be a significant reliability concern.
- Maintenance: Regular maintenance is crucial for reliability. Following the recommended service intervals can prevent many common issues.
- Driving Style: Gentle driving and allowing the engine to warm up can extend its lifespan and reduce the likelihood of problems.
- Aftermarket Modifications: Modifications can impact reliability. It’s essential to choose reputable parts and services if upgrades are desired.
Overall, while the BMW N47 engine has proven to be a capable and efficient powerplant, potential owners and current drivers should be aware of its common issues. Proactive maintenance and attention to detail can significantly enhance the engine’s reliability and longevity.