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Delphi puts its NOx sensors to the test

Tuesday 30 Jun 2026

Delphi has put its NOx sensors to the test against the original manufacturer (OE) and three leading competitors, to find out how the brand’s offering compares in reliability, durability, and performance.

 

The test saw each NOx sensor evaluated in four key performance areas: probe leakage, sensor accuracy, high temperature leakage and real-world driving, with the brand’s leading NOx Sensors range coming out on top!

 

Probe Leakage

 

Delphi’s probe scored an exceptional 0.02 ml, the lowest leakage of all parts tested. This result is not only 30 times tighter than the standard limit, but also significantly better than the three KDC brands, whose leakage values ranged from 0.3 ml to 0.5 ml.

 

Sensor Accuracy

 

Across all test stages of the sensor accuracy test, Delphi’s sensors closely matched OE data, demonstrating consistent, predictable performance even at elevated ranges that make them ideal for high-performance application.

 

Sensor accuracy is critical for effective emissions control and system performance. This test has shown Delphi has proven that its sensors have the key characteristics needed to match the performance levels set by OE parts

 

High Temperature Leakage

 

Even when put through high temperatures, Delphi’s NOx sensors showed outstanding stability, with O₂ readings remaining consistent throughout the test.

 

The seal held firm to ensure reliable data through considerable thermal stress, while the accuracy of other brand’s sensors were compromised due to fluctuation.

 

Real-world Driving

 

Delphi’s NOx sensor tracked closest to OE data across all simulated conditions, factoring in different load sizes, speeds and temperatures and delivering stable, consistent readings in both urban and highway environments.

 

Real-world driving is the ultimate test of sensor reliability. While other brands’ sensors showed  greater deviation under dynamic urban loads, Delphi’s consistent responsiveness and durability throughout all conditions, and precision engineered for real-world reliability.

 

Delphi’s best-in-class performance has been engineered with the future in mind. Displaying a clear commitment to innovation that sees accurate, durable sensors manufactured on a consistent basis.

 

For more information about Delphi’s full product range, visit https://www.delphiautoparts.com/