NTK 27074 OE Type 5-Wire Wideband Air/Fuel Ratio Sensor

The NTK 27074 is an OE-type, 5-wire wideband air/fuel ratio (A/F) sensor engineered to deliver precise, real-time feedback to your vehicle's engine control unit (ECU). As a direct-fit replacement, it is manufactured to meet or exceed original equipment specifications for dependable, plug-and-play installation.

Unlike conventional narrow-band switching oxygen sensors that simply toggle between rich and lean signals, this wideband A/F sensor produces a continuous linear output signal, enabling the ECU to determine the exact air-fuel mixture ratio and make immediate, precise adjustments. The result is optimized combustion efficiency, improved fuel economy, and reduced harmful exhaust emissions.

Key Features:

• 5-wire wideband design for accurate, linear air-fuel ratio measurement across a broad operating range
• OE-type construction ensures direct fitment with no modifications required
• Manufactured by NTK — the world's largest OEM oxygen sensor supplier and manufacturer
• Proprietary ceramic sensing element produced in-house from raw material to finished product for consistent quality control
• Extensively tested during production to guarantee reliability that meets or exceeds OE specifications
• Engineered for both import and domestic applications
• Part of the NGK/NTK family of sensor products, backed by decades of OEM expertise

Oxygen sensors are a critical component of a vehicle's on-board diagnostic system. A failed or degraded A/F sensor — often signaled by an illuminated check engine light — can lead to poor fuel economy, increased emissions, and premature failure of the catalytic converter. Replacing a faulty sensor promptly with a quality OE-type unit like the NTK 27074 helps protect downstream components and maintain peak engine performance.