Goss Oxygen Sensor OX503 – Lambda O2 Exhaust Sensor

PRODUCT OVERVIEW

The Goss OX503 oxygen sensor (lambda / O2 sensor) measures oxygen content in exhaust gases to help maintain the correct air/fuel ratio. This supports efficient combustion, stable idle and reduced emissions.

KEY FEATURES

• Precise oxygen measurement for accurate air/fuel ratio control
• Designed as an OEM-style replacement sensor
• Supports smooth running, power and fuel efficiency
• Helps reduce exhaust emissions when operating correctly

FUNCTION & BENEFITS

Mounted in the exhaust, the OX503 sensor continuously feeds data to the engine control unit. By monitoring oxygen levels in the exhaust stream, it enables the ECU to adjust fueling in real time. A correctly functioning oxygen sensor can assist with:

• Improved fuel economy
• Consistent engine performance
• Reduced likelihood of rough idle or hesitation
• Lower emissions compared with a faulty sensor

WHEN TO REPLACE

Oxygen sensors operate in harsh exhaust conditions and can degrade over time. Replacement is typically recommended when you experience symptoms such as:

• Illuminated check engine light relating to mixture control
• Noticeable increase in fuel consumption
• Poor performance or hesitation under load
• Failed or marginal emissions test results

DIAGNOSTIC NOTE

Before replacement, confirm sensor condition using appropriate diagnostic tools (scan tool or multimeter, where applicable) to check for correct response, continuity, voltage and resistance. Always diagnose the full fuel and ignition system to rule out related faults.

PART DETAILS

• Brand: Goss
• Part Number: OX503
• Category: Oxygen / Lambda / O2 exhaust sensor

FITMENT INFORMATION

This is a vehicle-specific component. Always verify compatibility using the vehicle fitment guide or by cross-checking the part number against your vehicle details before purchase and installation.