NTK 25592 Oxygen Sensor

Direct Fit Oxygen Sensor for Volvo and Saab

NTK 25592 is a direct fit heated oxygen sensor built for specific downstream and upstream applications across Volvo, Saab, and Saturn vehicles. It uses an OE-equivalent threaded design with a 4-wire configuration and a 30.25-inch harness length for a factory-style replacement.

As part of NTK’s Direct Fit Oxygen Sensor line, this sensor reflects the brand’s focus on OE application coverage and ceramic sensor manufacturing. NTK 25592 is engineered for precise fit, form, and function in import and domestic emission control service.

Key Features

• Heated oxygen sensor with specific fitment
• 4-wire design for OE-style signal and heater operation
• 30.25-inch wiring harness length
• 18 mm thread diameter with threaded mounting type
• Direct fit replacement for downstream and upstream applications
• Built by NTK, a major OE oxygen sensor manufacturer

Detailed Description

NTK 25592 is a direct fit oxygen sensor for vehicles including Volvo C30, Volvo S60, Volvo S80, Volvo XC90, Saab 9-3, Saab 9-5, and Saturn L300 applications. It is listed for downstream positions on many Volvo models and upstream positions on select Saab 9-3 and 9-5 applications, including Bank 1 Sensor 1 and left/right upstream locations where specified. This part number is also referenced in OE-style replacement catalogs for the same applications, including Bosch 16146 and DENSO Auto Parts 234-4822.

NTK uses ceramic sensor manufacturing expertise and extensive production testing to help ensure the sensor meets or exceeds OE specifications. For drivers searching for a Volvo C70 downstream oxygen sensor, a Saab 9-5 upstream oxygen sensor, or a Volvo S40 direct fit replacement, NTK 25592 provides a factory-style service part with the correct connector and mounting style.

Common Problems This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn sensor
• Slow sensor response during closed-loop fuel control
• Emissions test failures tied to downstream or upstream sensor faults
• Rough idle or drivability issues caused by inaccurate exhaust feedback

Installation Notes and Tips

Confirm the vehicle’s year, make, model, and sensor position before ordering. This part is listed for specific downstream and upstream locations, so match the original sensor placement and connector style to the application. The threaded mounting design and 4-wire harness support OE-style installation on listed Volvo, Saab, and Saturn vehicles.

For fitment searches, this part is commonly selected for 2007-2013 Volvo C30 downstream oxygen sensor service, 2000-2003 Saab 9-3 upstream oxygen sensor replacement, and 2005-2007 Volvo XC70 downstream applications. It also covers additional Volvo S70, S80, V50, V70, XC90, and Saturn L300/LW300/LW2/LS2 positions shown in the fitment data.

Quality Assurance

NTK is a long-standing OE oxygen sensor manufacturer with manufacturing controls focused on ceramic sensor quality and application accuracy. Each sensor is tested during production to support reliable operation and OE-level fitment for the listed vehicles.