Replacement REPH960919 Upstream Oxygen Sensor 4-Wire K24Z1 Engine

The Replacement REPH960919 is a direct-fit, upstream (pre-catalytic converter) oxygen sensor designed for the Honda K24Z1 2.4L four-cylinder engine. This O2 sensor monitors exhaust oxygen content before the catalytic converter, delivering accurate air-fuel ratio feedback to the engine control module (ECM) to maintain optimal combustion efficiency and fuel economy.

Key Features:

• 4-Wire Design: Heated oxygen sensor (HO2S) with dedicated heater circuit for fast warm-up and accurate readings
• Direct Fit: Threaded-in mounting with OEM-matched connector for hassle-free installation — no splicing or adapters required
• Upstream Position: Installs before the catalytic converter (Bank 1, Sensor 1) for precise air-fuel ratio control
• OEM-Quality Construction: Meets original equipment specifications for reliable, long-lasting performance
• Sold Individually: Single sensor included

Specifications:

• Wire Count: 4-wire
• Mounting Type: Threaded
• Position: Upstream / Before Catalytic Converter
• Engine: K24Z1 2.4L I4 DOHC
• Interchange Part Number: 25054065

Replacing a faulty upstream oxygen sensor restores proper closed-loop fuel management, eliminates rough idle, improves fuel efficiency, and clears related diagnostic trouble codes (DTCs). The REPH960919 is sold individually and is a reliable OEM-replacement solution for the Honda CR-V and compatible Acura ILX applications.