Replacing a Crankshaft Position Sensor (CKP) is important for your BMW. You may be considering an affordable aftermarket option like Duralast. We compare Duralast Crankshaft sensors with BMW-specific ones. We focus on quality, performance, and compatibility.
What Happens When a Crankshaft Sensor Fails in Your BMW?
The Crankshaft sensor is crucial for engine performance. It tracks the Crankshaft‘s position and speed. It sends data to the engine control unit (ECU) to manage fuel injection and ignition timing. If the sensor fails, your BMW may have:
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Engine Stalling or No Start: The engine may fail to start or may stall while driving.
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Check Engine Light (CEL): Error codes like P0335 often indicate Crankshaft sensor issues.
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Poor Engine Performance: Misfires, rough idling, and sluggish acceleration may occur.
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Erratic RPM Behavior: A faulty sensor can cause inconsistent RPM readings.
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Limp Mode: Some BMW models may enter limp mode if the sensor fails. This limits engine power to prevent damage.
Compatibility of Duralast Sensors with BMW Models
Model-Specific Considerations
Duralast offers Crankshaft position sensors for many BMW models. They work with popular engines, including the N51, N52, N53, N54, and N55. For example, the Duralast part SU10773 is designed for use in a wide range of BMW vehicles. However, not all Aftermarket Sensors are a perfect fit for every model. Compatibility is critical. Using the wrong sensor can cause poor performance or errors. Always consult your vehicle’s manual or check the exact part number to ensure the sensor will work seamlessly.
OEM vs. Aftermarket Sensors
OEM sensors are made to BMW’s exacting standards. They ensure the best compatibility and performance. BMW Crankshaft position sensors are crafted specifically for each model, resulting in a precise fit and function.
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Cost: OEM sensors generally cost between $130 to $200, depending on the model. In contrast, Duralast Crankshaft sensors are available for $50 to $100, making them a more affordable alternative.
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Compatibility: While OEM sensors guarantee compatibility, aftermarket brands like Duralast may not always be a perfect match. Despite this, many users report that Duralast sensors offer adequate performance at a fraction of the price.
Performance Metrics: Duralast vs. OEM Crankshaft Sensors
To evaluate Crankshaft sensors, use key metrics. They can show their effectiveness and reliability. We compare Duralast sensors to OEM sensors. We use data on their error rates, response times, and accuracy in detecting Crankshaft positions.
Key Performance Metrics
Error Rate
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OEM Sensors: They have low error rates. This is due to their precise manufacturing and rigorous testing. They meet specific OEM specs. This ensures reliable performance in various conditions.
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Duralast Sensors: Duralast aims to match OEM performance. But, users report more failures than with OEM parts. Some users report Duralast sensors failing within a year. This raises concerns about their reliability and error rates in critical applications.
Response Time
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OEM Sensors: They usually have faster response times. They are engineered for optimal integration with the vehicle’s engine management system. This quick response is crucial for maintaining engine timing and performance.
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Duralast Sensors: Duralast says their sensors have improved designs. They can react faster than OEMs in some cases. However, specific quantifiable data on response times compared to OEM sensors is limited.
Accuracy
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OEM Sensors: They are very accurate at detecting the Crankshaft position. This is vital for fuel injection and ignition timing. Their design usually includes advanced materials and tech. They improve signal clarity and reduce noise.
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Duralast Sensors: Incorporate Hall-effect technology, which can provide good accuracy; however, some users have reported inconsistencies in performance over time. The accuracy may diminish if the sensor experiences environmental stresses or if it fails prematurely.
Impact on Engine Performance
The differences in performance metrics between Duralast and OEM sensors can significantly affect engine operation:
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Engine Timing: A Crankshaft sensor that provides inaccurate readings can lead to improper timing of fuel injection and ignition, resulting in poor engine performance, misfires, or stalling.
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Fuel Efficiency: An unreliable sensor may cause the ECM to adjust incorrectly, hurting fuel economy.
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Overall Reliability: Users note that Duralast sensors are cheaper. But, they may be less reliable. This could raise maintenance costs due to failures and replacements.
Duralast sensors are a cheaper alternative to OEM parts. However, they may have higher error rates and variable performance. So buyers should weigh these risks before purchasing. Readers should weigh reliability and accuracy against cost. This is when choosing between Duralast and OEM Crankshaft position sensors for their BMWs.
Quality and Performance of Duralast Sensors
Warranty and Durability
One of the appealing aspects of Duralast sensors is their limited lifetime warranty, which offers peace of mind for many buyers. This warranty suggests that Duralast is confident in the quality of its products. Some BMW owners prefer OEM sensors for their durability. This is especially true for critical engine components. OEM sensors are more precise and reliable. So, they are safer for those who want things to last.
Installation Process: OEM vs. Aftermarket
Installing a Crankshaft position sensor on a BMW can take 2 to 3 hours, depending on your model’s engine layout and accessibility. The installation process for a Duralast sensor is similar to that of an OEM sensor, so there’s no significant difference in difficulty.
Here’s a basic outline of the installation steps:
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Disconnect the Battery: To prevent any electrical issues during the process.
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Locate the Sensor: It’s typically near the bottom of the engine block.
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Remove the Old Sensor: Unscrew the retaining bolts and disconnect the wiring harness.
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Install the New Sensor: Position the new Duralast sensor, secure it with bolts, and reconnect the harness.
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Clear Diagnostic Codes: After installation, clear any existing codes and perform a test drive to ensure the issue is resolved.
Are They a Cost-Effective Alternative for Your BMW?
The most compelling reason to choose a Duralast sensor is its lower cost. To save on repairs, Duralast is a good choice. It is cheap but of decent quality.
However, many experts still recommend OEM parts for critical components, like Crankshaft sensors. OEM sensors are more reliable. Their precision manufacturing ensures accurate engine control. Aftermarket Sensors like Duralast may have slight quality issues. This could affect engine performance over time.
Customer Reviews and Feedback on Duralast Crankshaft Sensors
BMW owners’ feedback on Duralast Crankshaft sensors is mixed. It highlights both positive aspects and major concerns. Below are summarized reviews based on real-world use. They focus on compatibility, performance, durability, and ease of installation.
Compatibility
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Positive Feedback: Some users found that the Duralast Crankshaft sensors fit and worked with their BMWs. One user, initially skeptical of Duralast products, noted the sensors were labeled with BMW and Siemens branding. This suggested they were as good as OEM parts.
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Negative Feedback: Some users, however, had concerns about compatibility. This was especially true when using Duralast sensors in older models. Some felt that Aftermarket Sensors did not match the reliability of OEM components.
Performance
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Mixed Reviews: Performance ratings vary significantly among users. Some reported no issues after installation. Others had problems soon after. One user said their Duralast sensor failed in two days. It caused performance issues and triggered error codes.
Durability
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Concerns About Longevity: A common theme in reviews is the durability of Duralast sensors. Many users reported that these sensors had shorter lifespans compared to OEM parts. One person said their Duralast sensor lasted only a year before needing a replacement. Another user said their new sensor failed after just a few weeks.
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Warranty Issues: Users also highlighted challenges with warranty claims. One reviewer was frustrated by unclear warranty coverage for Duralast’s electrical parts. It showed a lack of clarity from Autozone on the warranty’s duration.
Ease of Installation
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Most users found the Duralast Crankshaft sensor installation easy. They did not need professional help. The design typically allows for easy access to the sensor location, making it feasible for DIY enthusiasts.
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Installation Challenges: Some users warned of pitfalls during installation. They stressed the need for proper alignment and secure connections to avoid failures later.
Summary of Ratings
Based on user feedback:
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Compatibility: 4/5 (generally compatible but some concerns)
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Performance: 3/5 (mixed reviews; some failures reported)
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Durability: 2/5 (frequent reports of short lifespan)
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Ease of Installation: 4/5 (generally easy but potential installation pitfalls)
Monitoring After Installation
After installing a new Crankshaft Position Sensor, it’s crucial to monitor your vehicle’s performance closely. If the Check Engine Light returns, or if you notice rough idling, stalling, or starting problems, recheck the sensor installation or consult a mechanic.
In most cases, Crankshaft Position Sensors don’t need programming. Some BMW models may need an ECU reset after sensor replacement. This is to ensure proper engine timing.
Should You Use a Duralast Crankshaft Position Sensor in Your BMW?
Duralast Crankshaft Position Sensors offer a cost-effective alternative to BMW’s OEM parts. They are especially appealing to those seeking a budget-friendly option for repairs. However, ensure your new parts are compatible with your BMW. Also, check your engine’s performance after installation. Duralast sensors are cheaper. But, OEM sensors are more reliable and precise.
For key engine parts like the Crankshaft Position Sensor, it’s best to consult a BMW specialist or a qualified mechanic. This will ensure you make the right choice. In some cases, the added assurance of an OEM part is worth the higher price for long-term peace of mind.