NTK 25682 Oxygen Sensor - Downstream
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NTK
 Direct Fit Oxygen Sensor

NTK 25682 Oxygen Sensor - Downstream

Brand NTK 25682
Position Downstream
Wiring Harness Length 33.5000
Sensor Type Heated
Universal Or Specific Fit Specific
Wire Quantity 4
Thread Diameter 18.000
Mounting Type Threaded
Product line Direct Fit Oxygen Sensor
Fits Audi and Porsche · 11 vehicles

Direct fit design. Application-specific replacement for streamlined installation and OE-style fit.

Heated sensor. Helps maintain signal response as exhaust temperatures change.

OE-tested quality. Extensively tested during manufacturing to meet or exceed OE specifications.

Cross-references BBB Industries 16893, Bosch 16986 and URO 95860613710 for the same application. See all 7.

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Direct Fit Oxygen Sensor

NTK 25682 is a specific-fit heated oxygen sensor built for downstream applications with threaded mounting and a 4-wire design. It uses a 33.5-inch harness and an 18 mm thread diameter for applications that call for an OE-style direct fit.

NTK 25682 is part of the Direct Fit Oxygen Sensor line, which focuses on streamlined coverage and application-specific replacement parts. For Porsche Cayenne and Audi S6 applications, this sensor supports accurate exhaust feedback with the fit, form, and function expected from an OE replacement oxygen sensor.

Key Features

  • Heated oxygen sensor for downstream exhaust monitoring
  • Specific-fit design for direct replacement applications
  • Threaded mounting with 18 mm thread diameter
  • 4-wire configuration with 33.5-inch harness length
  • OE-equivalent design for select Porsche Cayenne and Audi S6 applications

Detailed Description

This NTK oxygen sensor is engineered for direct-fit replacement in downstream positions on select Porsche Cayenne and Audi S6 models. The heated sensor design helps maintain signal response as exhaust temperatures change, while the threaded body and application-specific harness length support a clean installation on the intended exhaust location. Part number 25682 is built to match the original equipment style used in these applications, making it a practical choice when replacing a worn or failing sensor.

NTK 25682 is backed by NTK's focus on original equipment oxygen sensor manufacturing and extensive production testing. The brand's Direct Fit Oxygen Sensor line is developed to simplify part selection while maintaining OE-level application coverage. This part cross-references Bosch 16986 for the same application.

What It Is Used For

  • Replacing a failed downstream oxygen sensor
  • Restoring exhaust feedback for engine management systems
  • Addressing check engine light conditions related to sensor performance
  • Correcting drivability issues caused by inaccurate oxygen readings
  • Replacing a sensor with damaged wiring or worn threaded mounting

Installation Notes and Tips

Verify the downstream position, wire count, and thread diameter before installation. Confirm the harness length and connector routing match the original sensor layout on the vehicle. Use the fitment notes for cylinder-bank identification on Porsche Cayenne and Audi S6 applications, and compare the old sensor to part number 25682 before installation.

Quality Assurance

NTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand is part of the NGK family of products and is recognized as a major original equipment oxygen sensor supplier.

Related reading

This part fits 11 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2017PorscheCayenne3.6LV6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2016PorscheCayenne3.6LV6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2014PorscheCayenne3.6LV6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2013PorscheCayenne3.6LV6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2012PorscheCayenne3.6LV6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2011AudiS65.2LV10DownstreamCyls. 9, 10; B4S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2011PorscheCayenne3.6LV6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2010AudiS65.2LV10DownstreamCyls. 9, 10; B4S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2009AudiS65.2LV10DownstreamCyls. 9, 10; B4S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2008AudiS65.2LV10DownstreamCyls. 9, 10; B4S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2007AudiS65.2LV10DownstreamCyls. 9, 10; B4S2; OE Equivalent Design; Direct Fit Oxygen Sensor
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 16893Bosch — 16986URO — 9586061371007L906265J75-3852234-4499234-4871