fits make: Bmw. year: 2019–2020.

( Brand: Autopart Premium ), ( Manufacturer Part Number: 57DYSH ), ( Part Type: Crank Sensor ), ( Engine: 4.4l V8 ), ( Trim: Coupe, Convertible, Base ), ( Compatible Make/model: Bmw M850i Xdrive ), ( Compatible Years: 2019 2020 19 20 ), ( Fitment Info: Crank Position Sensor ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )
The **BMW 57DYSH Crank Position Sensor** is a precision-engineered component essential for the seamless operation of the **2019 2020 4.4L TwinPower Turbo V8** found in the **M850i xDrive** a high-performance luxury sedan renowned for its exhilarating acceleration, refined handling, and cutting-edge BMW M Division engineering. This sensor, part of the vehicle s advanced ignition and fuel injection system, plays a critical role in accurately monitoring the crankshaft s rotational position and speed, enabling the engine control unit (ECU) to precisely time fuel delivery, ignition spark, and turbocharger boost control. Crafted from high-grade materials, the **57DYSH** is designed to withstand the extreme demands of the M850i s high-revving V8, which produces over **600 horsepower** and **575 lb-ft of torque** in its most potent form, ensuring reliable performance even under aggressive driving conditions.
The sensor features a robust **Hall-effect-based detection system**, which provides real-time feedback to the ECU with exceptional accuracy, allowing for optimal engine tuning and power output. Its compact yet durable housing is engineered to resist vibration, heat, and oil contamination critical factors in maintaining long-term reliability in a high-performance application. The **57DYSH** is specifically calibrated for BMW s **N74** engine platform, which powers the M850i, and is compatible with both the **xDrive** (AWD) and rear-wheel-drive configurations. Whether installed in a meticulously maintained showroom specimen or a performance-focused enthusiast s project car, this sensor ensures that the M850i s legendary V8 delivers its signature blend of torque, responsiveness, and efficiency even under the most demanding driving scenarios.
For owners and mechanics seeking the highest level of authenticity and performance, this **OEM-replacement crank position sensor** is the ideal choice, offering the same level of precision and durability as the factory-equipped component. Its seamless integration with BMW s advanced engine management system guarantees that the M850i s **TwinScroll turbochargers**, **direct fuel injection**, and **variable valve timing** all operate in perfect harmony, delivering the kind of effortless power and refinement that defines the M Division. Whether addressing a diagnostic trouble code (DTC) related to **P0335 (Crankshaft Position Sensor Circuit Malfunction)** or performing a routine maintenance upgrade, this sensor ensures that the M850i s legendary V8 continues to roar with authority, proving that even in the world of high-performance luxury, every detail matters.
### **Pros and Cons of buying a Autopart 57DYS-H Crank Position Sensor for a BMW M850i XDrive (2019-2020, 4.4L V8)**
#### **Pros:**1. **OEM-Quality Compatibility** The sensor is designed to match the original BMW specification, ensuring proper fitment and functionality without modification. It uses the same connector and mounting points as the factory part, reducing the risk of installation issues.
2. **Reliability and Durability** Autopart sources high-quality components, often from reputable manufacturers, which means the sensor should perform reliably for the expected lifespan of the vehicle. The 4.4L V8 engine in the M850i is performance-oriented, and a reliable crank sensor is critical for smooth operation and fuel delivery.
3. **Direct Replacement** No additional wiring or software updates are typically required, as the sensor is a direct drop-in replacement for the stock unit. This simplifies the replacement process and reduces labor costs if installing it yourself.
4. **Warranty and Support** Autopart offers warranties on their parts, providing some assurance against defects. Customer support is generally available to assist with installation questions or issues, though response times can vary.
5. **Cost-Effective Alternative to OEM** While not an OEM part, it is often priced significantly lower than a new BMW dealer part, making it a budget-friendly option without sacrificing quality.
6. **Easy Availability** Autopart is a well-known aftermarket supplier with a wide distribution network, meaning the sensor is likely to be in stock and quickly shipable, avoiding long wait times for OEM parts.
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#### **Cons:**1. **Aftermarket vs. OEM Quality** While Autopart sensors are generally reliable, they are not original BMW parts. There is a slight risk of inferior materials or manufacturing inconsistencies compared to the factory unit, though this is rare with reputable suppliers like Autopart.
2. **Potential Fitment Issues** In rare cases, aftermarket sensors may not align perfectly with the vehicle s wiring harness or mounting bracket due to minor design differences. However, the 57DYS-H is specifically listed for the M850i, so this risk is minimized.
3. **No BMW Warranty Coverage** If the sensor fails prematurely, it will not be covered under the vehicle s factory warranty, unlike an OEM replacement. This could be a concern if the sensor is critical to the engine s operation.
4. **Limited Long-Term Data** While Autopart has a good reputation, long-term performance data on this specific sensor for the M850i may not be as extensive as that of OEM parts, which have been tested extensively by BMW.
5. **Installation Complexity** Replacing a crank position sensor requires some mechanical skill, as it involves working near the engine s timing components. Improper handling could lead to damage to the sensor, harness, or engine parts. If unsure, professional installation is recommended.
6. **Compatibility with Modifications** If the vehicle has been modified (e.g., tuning, forced induction, or custom wiring), the aftermarket sensor may not integrate perfectly with those changes. Always verify compatibility with any aftermarket modifications.
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### **Conclusion:**The **Autopart 57DYS-H crank position sensor** is a strong aftermarket alternative to an OEM BMW part for the 2019-2020 M850i s 4.4L V8 engine. It offers OEM-level compatibility, reliability, and cost savings while maintaining accessibility. For most owners, this sensor will perform just as well as the original, provided it is installed correctly and comes from a trusted supplier like Autopart.
However, if budget is not a concern and you prefer the absolute highest level of assurance, an **OEM BMW crank position sensor** (part number 57DYS-H or equivalent) from a dealer or authorized BMW parts supplier may be preferable. The OEM part comes with warranty coverage and has been rigorously tested for the M850i s specific requirements.
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### **Recommendation:** - **Buy the Autopart 57DYS-H sensor if:**- You prioritize cost savings without sacrificing quality.
- You are comfortable with aftermarket parts and have verified the sensor s compatibility with your vehicle.
- You plan to install it yourself or have a trusted mechanic perform the replacement.
- The sensor is sourced from a well-reviewed seller (e.g., Autopart s official website or a reputable online retailer).
- **Consider an OEM sensor if:**- You want the full warranty coverage and peace of mind of a factory part.
- Your vehicle has extensive modifications that could affect sensor performance.
- You are unsure about the reliability of aftermarket sensors in your specific application.
For the vast majority of M850i owners, the **Autopart 57DYS-H sensor is an excellent choice**, offering a balance of quality, affordability, and ease of acquisition. Always cross-reference the part number with your vehicle s specifications to ensure it matches exactly.
Terminal Type: Blade. Connector Type: Plug In. Connector Shape: Oval. Terminal Gender: Male.
Type: Crankshaft Position Sensor. Detailed Applications Years: Vehicle: Sub model: Engine: 2019 - 2020 BMW M850i xDriveCoupe4.4L V8, xDriveConvertible4.4L xDriveBase4.4L V8. Crank Position Sensor fits BMW M850i xDrive 2019 - 2020 4.4L V8 57DYSH: Brand: Autopart Premium condition: New Notes: Detailed Crankshaft for F10 550i F90 M6 Gran Coupe M5 F15 X5 G07, Specifications Terminal Quantity: 3.