NTK 25569 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Direct Fit Oxygen Sensor for BMW and Land Rover

NTK 25569 is a heated, direct fit oxygen sensor built for specific upstream applications on select BMW and Land Rover vehicles. It is designed with OE-equivalent form and function for accurate air-fuel ratio feedback and straightforward replacement on the correct bank and sensor location.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit design for direct replacement
• 4-wire configuration with a 13.75 in. wiring harness
• 18 mm threaded mounting type
• OE-equivalent design for upstream sensor locations
• Built by NTK, the Sensor Specialist and a major OE oxygen sensor supplier

Product Details

NTK Direct Fit Oxygen Sensor 25569 is engineered for import applications that require precise exhaust feedback and exact connector and thread matching. This sensor supports upstream monitoring on BMW X3, X5, 320i, 325xi, 330xi, Z4, 525i, 530i, 540i, M5, Z3, and related models, as well as select Land Rover Range Rover applications. For shoppers searching for a BMW X5 upstream oxygen sensor, BMW 330i Bank 1 Sensor 1 replacement, or a Land Rover Range Rover upstream right oxygen sensor, this part number is built for those exact service needs.

NTK uses ceramic manufacturing expertise and OE application technology to control sensor quality from raw material through finished product. The result is a replacement oxygen sensor designed to match the original mounting style, wiring layout, and sensor response expected in the vehicle’s emission control system. Part number 25569 also cross-references Bosch 13477 for the same application.

What This Sensor Helps Address

• Check engine light caused by oxygen sensor fault codes
• Incorrect air-fuel ratio readings from a worn upstream sensor
• Reduced fuel control accuracy in the emission system
• Slow sensor response during closed-loop operation
• Service replacement for damaged wiring or failed heater circuit

Installation Notes and Tips

Confirm the exact position before ordering, since this listing covers multiple upstream locations including Bank 1 Sensor 1, Bank 2 Sensor 1, upstream left, and upstream right depending on vehicle application. Match the 4-wire connector, 18 mm thread diameter, and 13.75 in. harness length to the original sensor before installation. Verify the vehicle’s year, engine, and sensor location against the fitment list for BMW 320i, BMW X3, BMW X5, and other listed applications.

Quality Assurance

NTK manufactures oxygen sensors with extensive testing during production to help ensure quality and reliability that meet or exceed OE specifications. As part of the NGK family of products, NTK supports import and domestic emission control applications with OE-focused sensor technology.