NTK 25175 Oxygen Sensor - Downstream Left or Downstream Right

Direct Fit Oxygen Sensor for Kia Sorento

NTK 25175 is a direct fit heated oxygen sensor built for specific applications on the 2003-2006 Kia Sorento. It is engineered for downstream left and downstream right positions, with OE-style fit, form, and function for emission control service.

Key Features

• Direct fit oxygen sensor for specific vehicle applications
• Heated sensor design for faster operating response
• 4-wire configuration with a 28.5 in. wiring harness
• 18 mm threaded mounting type
• Built to meet or exceed OE specifications through manufacturing testing
• Compatible with 2003-2006 Kia Sorento downstream left and downstream right locations

Product Details

NTK Direct Fit Oxygen Sensor 25175 is part of the NTK Sensor Specialist line, focused on OE-style replacement coverage for import and domestic vehicles. NTK uses ceramic-based sensor manufacturing expertise and controlled production processes to deliver consistent sensor performance and application-specific fitment. For drivers servicing a Kia Sorento oxygen sensor fault, this part supports downstream emissions monitoring in the B1S2 and B2S2 locations.

This part cross-references Bosch 15657 and DENSO Auto Parts 234-4166 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Fault codes tied to downstream sensor response
• Incorrect air-fuel feedback readings in the exhaust system
• Emissions test failure caused by a worn sensor
• Reduced sensor reliability from age, heat, and contamination

Installation Notes and Tips

Verify the sensor position before installation: this application covers downstream left and downstream right on the 2003-2006 Kia Sorento. Confirm the 4-wire connector, 18 mm thread diameter, and harness length match the original sensor before replacement. Use proper exhaust sensor removal practices to avoid damaging the threads or wiring.

Quality Assurance

NTK manufactures oxygen sensors with extensive testing during production to help ensure quality and reliability that meet or exceed OE specifications. As the largest supplier and manufacturer of original equipment oxygen sensors worldwide, NTK supports OE application coverage with direct fit replacement parts like the 25175.