NTK 27098 OE Type 5-Wire Wideband Air/Fuel Ratio Sensor

The NTK 27098 is an OE-type 5-wire wideband air/fuel ratio (AFR) sensor — also commonly referred to as a wideband oxygen sensor or A/F sensor — engineered to deliver precise, linear exhaust gas measurement for optimal engine management. As the world's largest OEM oxygen sensor manufacturer, NTK produces this sensor using the same ceramic technology and specifications found in original equipment applications.

Unlike conventional narrowband switching oxygen sensors that only signal rich or lean, this wideband sensor generates a continuous linear output signal that allows the ECU to determine the exact air-fuel mixture and make real-time, precise adjustments to maintain stoichiometric combustion — maximizing fuel efficiency and minimizing harmful emissions.

Key Features:

• 5-Wire Wideband Planar Design — Compact planar element fits in tighter, more space-restricted exhaust locations
• OE-Identical Construction — Built to the same specifications as the original factory sensor for true direct-fit replacement
• OEM-Specified Connector & Hardware — Includes factory-matched connector and attaching hardware for straightforward installation
• Advanced Ceramic Technology — NTK controls ceramic composition from raw material to finished product for consistent, reliable sensor performance
• Extensively Tested — Undergoes vibration and thermal shock testing during OE development, plus manufacturing-stage quality verification to meet or exceed OE specifications
• Heated Sensor Element — Integrated heater circuit ensures rapid sensor warm-up and accurate readings across all operating conditions

NTK oxygen sensors are designed to protect expensive catalytic converters by ensuring the engine runs at the correct air-fuel ratio. Replacing a failed or degraded wideband AFR sensor promptly helps prevent premature catalytic converter failure and keeps the vehicle's on-board diagnostic system functioning correctly.