Delphi ES10581 Heated Oxygen Sensor Sensor - 4-Wire O2

The Delphi ES10581 is a heated 4-wire oxygen sensor (O2 sensor / lambda sensor) engineered to deliver accurate exhaust gas monitoring and emissions control. Designed as a direct OE-quality replacement, this sensor features a heated element that reaches operating temperature rapidly, improving closed-loop fuel management and reducing cold-start emissions.

As a global OE manufacturer, Delphi builds every aftermarket oxygen sensor to the same specifications used on the original production line. The ES10581 features a 4-wire configuration — two wires dedicated to the sensor signal and two for the heater circuit — ensuring consistent, accurate oxygen level readings throughout the sensor's service life.

Key Features:

• Heated sensor element for fast warm-up and accurate readings from cold start
• 4-wire design with dedicated signal and heater circuit wires
• 18 x 1.5 mm thread size for proper OE fitment
• 820 mm (approx. 32.3 in) overall cable length for front/front-left sensor positions
• Round connector for secure, proper mating to OE wiring harness
• Patented protective sensor coating resists contamination from silicone, phosphorous, and fuel/oil additives
• Manufactured and tested to OE standards for fit, form, and function
• Validated for use with ethanol-blend fuels including E85
• Includes oxygen sensor and installation instruction sheet

OEM Cross-Reference Numbers: BMW 11781405324, BMW 11781743994, Mercedes-Benz 0005407517, Mercedes-Benz A0005407517

The Delphi ES10581 is built to restore proper air-fuel mixture feedback to the engine control module, helping maintain peak fuel efficiency, reduce harmful emissions, and keep the check engine light off.