NTK 23549 Oxygen Sensor

Direct-Fit Oxygen Sensor

NTK oxygen sensor 23549 is a specific-fit, heated sensor built for emission control applications that require OE-style form and function. It uses a threaded mounting design and a 4-wire configuration with a 19-inch harness for direct replacement service.

Compatible with Mitsubishi Mirage, Mitsubishi 3000GT, Dodge Stealth, Mitsubishi Diamante, and Mitsubishi Montero applications listed below, this NTK oxygen sensor 23549 supports accurate exhaust feedback for vehicles with federal or California emissions configurations. The Direct Fit Oxygen Sensor line is built to streamline coverage while maintaining application-specific fitment.

Key Features

• Heated oxygen sensor design for faster operating response.
• Specific-fit construction for application-matched replacement.
• Threaded mounting type for OE-style installation.
• 4-wire layout with 19-inch harness length.
• 18 mm thread diameter.

Application Details

Fits 2001-2002 Mitsubishi Mirage, Downstream. Fits 1997-2000 Mitsubishi Mirage, Upstream. Fits 1997-2000 Mitsubishi Mirage, Downstream. Fits 1997 Mitsubishi Mirage, Upstream. Fits 1993-1999 Mitsubishi 3000GT, Upstream Left. Fits 1997-1999 Mitsubishi 3000GT, Downstream Right. Fits 1994-1997 Mitsubishi 3000GT, Downstream Left. Fits 1993-1996 Dodge Stealth, Upstream Left. Fits 1994-1996 Dodge Stealth, Downstream Left. Fits 1994-1995 Dodge Stealth, Downstream Left. Fits 1994-1996 Mitsubishi Diamante, Downstream Left. Fits 1995 Mitsubishi Montero, Downstream Left. Fits 1991-1992 Dodge Stealth, Upstream Left. Fits 1991-1992 Mitsubishi 3000GT, Upstream Left.

What It Helps Address

• Faulty oxygen sensor readings.
• Check engine light concerns related to sensor performance.
• Incorrect air-fuel feedback to the engine control system.
• Emission control issues tied to worn sensor response.

Installation Notes and Quality

Verify the listed year, make, model, and sensor position before installation. Match the threaded mounting style, wire count, and harness length to the original unit for proper fitment. NTK states these oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. Part number 23549 is part of NTK's Direct Fit Oxygen Sensor line, and 23549 is cross-referenced to Delphi ES20146 for the same application.

NTK is a major original equipment oxygen sensor supplier and uses ceramic-focused manufacturing expertise to support fit, form, and function across its sensor range.