HomeEmission Control > SensorsNTK 25648 Oxygen Sensor - Downstream or Upstream
Part #: 25648

NTK 25648 Oxygen Sensor - Downstream or Upstream

Direct Fit Oxygen Sensor, Downstream
14 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Direct Fit Oxygen Sensor, Downstream
Fitment: Mini, Cooper
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of NTK Direct Fit Oxygen Sensor 25648

The NTK Direct Fit Oxygen Sensor 25648 is designed specifically for Mini Cooper models, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a 24.5-inch wiring harness for straightforward installation.

  • Heated oxygen sensor for faster response times
  • Specific fit for Mini Cooper vehicles
  • 24.5-inch wiring harness length for flexible routing
  • Threaded mounting with 18mm thread diameter
  • Four-wire configuration for accurate signal transmission

Detailed Product Description

The NTK Direct Fit Oxygen Sensor 25648 is engineered to meet the exact specifications of Mini Cooper models, providing reliable and accurate oxygen level readings. This sensor is heated, which helps it reach operating temperature quickly, improving fuel efficiency and reducing emissions. The four-wire design supports both the sensor signal and heater circuit, ensuring consistent performance. With a threaded mounting type and an 18mm thread diameter, installation is secure and compatible with the vehicle’s exhaust system. The 24.5-inch wiring harness length offers sufficient reach for proper connection without excess slack.

About the NTK Direct Fit Oxygen Sensor Line

The Direct Fit Oxygen Sensor line by NTK is developed to provide vehicle-specific sensors that match OEM specifications. This product line focuses on delivering sensors that require no modifications during installation, maintaining factory fit and function. The 25648 sensor is part of this line, designed to fit Mini Cooper models precisely, ensuring compatibility and reliable emission control.

Common Applications and Issues Addressed

  • Restores accurate air-fuel mixture readings for Mini Cooper engines
  • Helps resolve check engine light triggers related to oxygen sensor faults
  • Improves fuel economy by providing precise feedback to the engine control unit
  • Reduces harmful emissions by maintaining proper combustion
  • Prevents rough idling and engine performance issues caused by faulty sensors

Installation Notes and Tips

  • Ensure the vehicle is cool before sensor replacement to avoid burns
  • Use appropriate tools for threaded sensor removal and installation
  • Verify the wiring harness length and connector compatibility before installation
  • Do not over-tighten the sensor; follow manufacturer torque specifications
  • Check for exhaust leaks after installation to maintain sensor accuracy

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. The Direct Fit Oxygen Sensor 25648 undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the product documentation or supplier.

BrandNTK
Part Number25648
PositionDirect Fit Oxygen Sensor, Downstream
Mounting TypeThreaded
Sensor TypeHeated
Thread Diameter18.000
Universal Or Specific FitSpecific
Wire Quantity4
Wiring Harness Length24.5000

This part fits 14 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2008MiniCooper1.6LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
2008MiniCooper1.6LL4DownstreamB1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor
2007MiniCooper1.6LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
2007MiniCooper1.6LL4DownstreamB1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor
2006MiniCooper1.6LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
2006MiniCooper1.6LL4DownstreamB1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor
2005MiniCooper1.6LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
2005MiniCooper1.6LL4DownstreamB1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor
2004MiniCooper1.6LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
2004MiniCooper1.6LL4DownstreamB1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor
2003MiniCooper1.6LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
2003MiniCooper1.6LL4DownstreamB1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor
2002MiniCooper1.6LL4UpstreamBank 1 Sensor 1 Oxygen Sensor; Direct Fit Oxygen Sensor
2002MiniCooper1.6LL4DownstreamB1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1178087267413878234-445775-3397ES20222

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.