Your Professional NOx Sensor (For BMW) Supplier!
Wenzhou Yili Automotive parts Technology Co., Ltd. is a modern company specializing in R&D and production of oxygen sensors, temperature control switches, ABS wheel speed sensors, camshaft position sensors, crankshaft position sensors, water temperature sensors, oil pans, and intake manifolds. And has a complete and scientific quality management system, advanced testing platform and strong R&D team.
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NOx Sensor For BMW 5WK9 6621J/7 587 130 05
Connector Type:Flat 5-pin black. Probe type:Small Head. Insulating sleeve:Black. Add to Inquiry -
NOx Sensor For BMW 5WK9 6621H/7 587 130 03
Insulating sleeve:Black. Applicable voltage:12V. Mounting hole type:Round ears. Add to Inquiry -
NOx Sensor For BMW 5WK9 6621G/7 587 130 02
Connector Type:Flat 5-pin black. Probe type:Small Head. Insulating sleeve:Black. Add to Inquiry
Why Choose Us
Professional team
We have a professional R&D team composed of experienced engineers and scientific researchers. The team can continuously invest resources to carry out the research and development of new technologies and new materials, and continuously launch products with better performance and better market demand.
Advanced equipment
We are equipped with a full set of automated production equipment, a complete sensor R&D platform and dedicated test bench testing equipment to provide solid technical support for product development and quality assurance.
Quality control
From raw material procurement to product production, assembly, testing, packaging and other links, we have established detailed quality standards and inspection processes. Through strict quality control, we ensure that every product shipped meets high quality requirements.
OEM&ODM service
We have a complete and scientific quality management system, advanced testing platform and strong R&D capabilities, and can provide customers with high-quality OEM and ODM service solutions.
NOx Sensor (For BMW) Specification
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Applicable Model |
5WK9 6621J 7 587 130 05 |
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Connector Type |
Flat 5-pin black |
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Probe type |
Small Head |
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Insulating sleeve |
Black |
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Applicable voltage |
12V |
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Mounting hole type |
Round ears |
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Back cover type |
Metal |

The benefits of having a functional NOx sensor in a vehicle are manifold.
They play a critical role in reducing environmental pollution. By controlling the emission of nitrogen oxides, these sensors help mitigate the formation of ground-level ozone and fine particulate matter, both of which have severe implications for environmental and human health.
NOx sensors are vital for the economic performance of the vehicle. They help in optimizing fuel usage, which can lead to significant savings on fuel over time, especially for heavy-duty vehicles and fleets. This optimization is achieved by ensuring that the engine does not use more fuel than necessary and that it operates at peak efficiency.
NOx sensors operate on advanced electrochemical principles involving two electrodes made from specially designed materials that interact with nitrogen oxides. When these gases contact the electrodes, they trigger a chemical reaction that generates an electrical signal.
This signal varies in intensity proportionally to the NOx levels present in the exhaust gases. The sensor's processor interprets this signal and converts it into a form that can be used by the ECU to make real-time adjustments to the vehicle’s emission control strategies, thereby maintaining optimal performance and compliance with emission standards.

Knowing When to Replace NOx Sensor
There are several signs that a NOx sensor is failing or has failed. The most obvious is the illumination of the check engine light on the dashboard. This can be accompanied by specific diagnostic trouble codes (DTCs) related to the NOx sensor, which can be read using a vehicle diagnostic tool.
Another sign that a NOx sensor may need to be replaced is a noticeable decrease in fuel efficiency. If the sensor is not accurately monitoring NOx levels, the engine may not optimize its fuel use, resulting in higher than normal fuel consumption. If the vehicle fails an emissions test, it could be due to a faulty NOx sensor that is not adequately regulating or reporting the emissions levels.
It is also advisable to consider the age and mileage of the vehicle. NOx sensors operate in harsh conditions and are subject to wear and degradation over time. Adhering to these recommendations can prevent sudden failures.
Our Services
Pre-Sale Service
Provide detailed introductions of our products, assist customers in selecting appropriate options, and recommend products that best meet their needs.
In-Sale Service
Deliver high-quality products with efficient shipping processes while keeping customers informed throughout all stages of production.
After-Sale Service
Ensure prompt responses to any inquiries or issues that may arise.
Packaging and Shipping
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Packaging |
Neutral packaging, if you want to design packaging, please feel free to contact us. |
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Transportation methods |
Road transport, rail transport, sea transport, air transport |
Advantage








Our Certificate
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We're professional nox sensor(for bmw ) manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy high-grade nox sensor(for bmw ) made in China here from our factory.
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