Bosch 0258030520 OE-Style Heated Oxygen Sensor (O2 Sensor)

The Bosch 0258030520 is an OE-equivalent heated oxygen sensor (O2 sensor) engineered to deliver precise air-fuel ratio feedback to the engine control unit (ECU). Designed to meet or exceed original equipment specifications, this sensor helps maintain optimal combustion efficiency, supports closed-loop fuel control, and contributes to reduced exhaust emissions.

Key Features:

• OE-Quality Construction: Built to the same standards as sensors supplied to vehicle manufacturers, ensuring a direct-fit replacement experience
• Heated Design: Integrated heater element accelerates sensor warm-up for faster closed-loop operation, reducing emissions during cold starts
• Zirconia Ceramic Sensing Element: Provides accurate and stable lambda (air-fuel ratio) readings across a wide range of operating temperatures
• High-Temperature Resistant Materials: Protective housing and wiring are engineered to withstand extreme underhood and exhaust heat and vibration
• Bosch OE Lineage: Bosch invented the automotive oxygen sensor and began production in 1976, bringing over five decades of OE sensor development to every replacement part

The Bosch 0258030520 oxygen sensor installs directly onto the exhaust system in the designated upstream or downstream bung location. Proper O2 sensor function is critical to avoiding a check engine light (MIL), maintaining fuel economy, and passing emissions inspections. Replacing a failed or degraded sensor with a genuine Bosch unit restores factory-level performance and reliability.