NTK 23538 Oxygen Sensor - Upstream

Direct Fit Oxygen Sensor for OE Replacement

NTK 23538 is a direct fit heated oxygen sensor built for specific applications in Chrysler, Dodge, and Voyager/Town & Country fitments. It uses OE-style threaded mounting, a 4-wire design, and a 15.2500-inch wiring harness length to match the original sensor layout for upstream air/fuel ratio monitoring.

As part of NTK’s Direct Fit Oxygen Sensor line, this sensor is engineered for import and domestic coverage with application-specific fitment and OE-style form, helping simplify replacement on the correct bank and sensor location.

Key Features

• NTK part number 23538
• Heated oxygen sensor for upstream use
• Specific fit design for direct replacement
• 4-wire configuration with threaded mounting
• 18.000 thread diameter
• 15.2500-inch wiring harness length
• OE-style replacement for air/fuel ratio monitoring

Detailed Product Overview

NTK is a major original equipment oxygen sensor manufacturer, and this sensor reflects that OE-focused approach with controlled ceramic technology and manufacturing validation. The result is a replacement oxygen sensor built to match the original application’s fit, form, and function requirements. NTK 23538 is listed for 2001-2003 Chrysler Town & Country, 2001-2003 Chrysler Voyager, 2001-2003 Dodge Caravan, and 2001-2003 Dodge Grand Caravan in the upstream position. This part cross-references Bosch 13709 for the same application.

What This Sensor Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air/fuel ratio feedback to the engine control system
• Slow or inaccurate sensor response during closed-loop operation
• Replacement needs on Chrysler Town & Country, Voyager, Caravan, and Grand Caravan models
• OE-style sensor replacement for Bank 1 Sensor 1 applications

Installation Notes and Tips

Confirm the vehicle year, make, model, and upstream sensor location before installation. This sensor uses a threaded mounting style and a specific-fit harness, so matching the original routing and connector position is important for proper installation. Verify the application against the vehicle’s emissions system layout, especially on 2001-2003 Chrysler Town & Country and 2001-2003 Dodge Caravan platforms.

Quality Assurance

NTK manufactures oxygen sensors with OE-level application coverage and extensive production testing to support quality and reliability that meets or exceeds original equipment specifications. The brand’s OE manufacturing background and ceramics expertise support consistent sensor performance across direct-fit replacement applications.