Aisin OXSH-00048 Upstream Narrowband Oxygen (O2) Sensor OE Replacement

The Aisin OXSH-00048 is an upstream, narrowband oxygen (O2) sensor engineered as a direct OEM-quality replacement. Aisin has been a trusted supplier to global vehicle manufacturers since 1965, and this sensor is built to the same exacting standards as original equipment parts, delivering seamless fit and dependable long-term performance.

This upstream O2 sensor monitors exhaust gases before the catalytic converter, providing critical feedback to the engine control unit (ECU) to optimize the air-fuel mixture for efficient combustion, reduced emissions, and proper fuel economy. A failing upstream oxygen sensor can trigger check engine lights and cause rough running or increased fuel consumption — this direct-fit replacement restores proper operation without modification.

Key Features:

• Position: Upstream (before catalytic converter)
• Sensor Type: Narrowband
• Overall Length: 21.65 inches
• Thread Size: M18
• Terminal Quantity: 4
• Terminal Gender: Female
• Connector Shape: Square
• Wire Quantity: 4
• Sensor Quantity: 1
• Plug-and-play design — no modifications required for installation
• Installation manual included

Backed by Aisin's reputation as an OE supplier, the OXSH-00048 oxygen sensor provides a reliable, cost-effective alternative to dealer parts. Engineered using advanced original equipment technology for lasting quality and a precise fit.