Delphi ES10353 Heated Oxygen Sensor 4-Wire Front O2 Sensor

The Delphi ES10353 is a direct-fit, heated oxygen sensor (O2 sensor) engineered to OE specifications for precise air-fuel ratio monitoring. Built by Delphi — one of the original equipment suppliers to the world's leading automakers — this sensor delivers the same quality and accuracy as the part your vehicle was originally built with.

Key Features:

• Heated 4-wire design with an 18 x 1.5 mm thread size and 360 mm overall length for a precise, direct-fit installation
• Patented planar sensor construction for long-lasting, reliable operation and faster closed-loop activation compared to older conical-style sensors
• Unique protective sensor coating guards against silicone, phosphorous, and other fuel and oil additive contaminants that can trigger check engine lights and cause premature sensor failure
• OE-matching connectors and wire lengths for a faster, hassle-free installation straight out of the box
• High-temperature water seal resists water intrusion, extreme heat, vibration damage, and wire corrosion to preserve long-term signal accuracy
• Anti-seize compound pre-applied or included to prevent the sensor from welding into the threads over time
• Validated for all fuel types, including ethanol blends such as E85
• OE tested to 150,000 miles and 2,000 hours of severe thermal testing

Cross-reference part numbers include: 234-4671, 234-4680, OS667, OS673, SG109, SG251, SU5708, SU5717, REA1350, REA1390, 138-392, 156-4069, 156-4405, 13453, 13522, 25560, and OEM BMW numbers 11 78 1 247 409, 11 78 1 247 475, 11 78 1 704 259, and 11 78 1 741 317.